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1770-6.2.2

1. PLC 3 i To Data Highway Plus PLC 2 Pyramid Integrator 1771 KA2 a T 5130 RM1 m ml ENY 3 008 1 ole af daja z o T a oe P Jo 8 1785 KA z U HH o 0 ii i i GW el a NUN iil 2 ololololo j g mf o o Data Highway gt 1770 KF2 i 5 ojoo o 00000 i i a po j C 3 i aldia y af Siulai 5 1771 KEIKF f A o AL Paih D loff P LI I 1774 PLC ojo 5 olo Mi 3 Eee 1774KA S x PLC 3 Pyramid Integrator 1775 S5 Sid z AHI o Computer m Personal Computer 18661 How Nodes Communicate on DH A DH network uses peer to peer communication through a modified token passing scheme called floating master The master controls access to the network and can initiate messages at any time With this arrangement nodesbid for temporary mastership based on their need to send information In this way each node has equal access to become the master Chapter 1 DH and DH Overview Unlike a master slave relationship a floating master relati
2. ohe 2 Oe 12646 O O O on O O E O O on OOO O Put cap on ce dropline jack 12647 Prepare the Trunkline Cable for Installation Chapter 6 Constructing a DH II Cable System The cap helps prevent electrical noise It also prevents contaminants from getting into the tap Store the unused dropline cable for future use After installing the taps the next step is to prepare the trunkline segments for installation Refer to the next procedure for instructions There are two parts to preparing the trunkline cable for installation cut the cable attach cables plugs to the trunkline Cut the Cable The trunkline is constructed of RG 11 type coaxial cable When cutting the cable segments make them long enough to route from one tap to the next with sufficient slack so that the bend radius is not less than 6 inches 15 2 cm See Chapter 5 for more information about the trunkline bend limit Make sure that the cable segments are at least 30 feet 9 2 meters long between taps Attach the Cable Plugs to the Trunkline After cutting the trunkline segments to the desired lengths you must attach a cable plug to each end of the segment These plugs connect the trunkline segment to the tap To attach the cable plugs to trunkline segments follo
3. Trunkline Segment Plug Connector T Connector z W N E A A Dropline of l s Node you want to disconnect 4g dg Jack 2 Terminator 11623 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System 3 Plug the terminator into the end of the trunkline segment that you disconnected from the T connector n n T Connector f H R IN H a CEAN T B iral Dropline of discarded Trunkline node Segment Jack Terminatortor Plug Gonnectorr a ae f ia ay Reconnect You may also remove Terminator here unneeded Trunkline Segment 11622 4 If possible remove the T connector and dropline from the site and store them for future use 3 39 Chapter Overview The DH Il Cable System Chapter Data Highway II Overview Read this chapter for information on the DH II cable system how nodes communicate on DH II communication between networks communication with synchronous and asynchronous devices related products and publications
4. 1 o0 oo 0000 w N Dropline E 12651 Secure each cable in place with some form of strain relief device to help make sure that you adhere to the bend radius of the cable the cable is not accidentally pulled out of its plug Install the Dro plines When you connect a dropline to an interface module make sure that the bend radius is not less than 3 inches 7 6 cm If there is not enough room to adhere to the bend radius specification you must remount the tap following the instructions provided earlier in this chapter 6 9 Chapter 6 Constructing a DH II Cable System Plug the right angle plug of the dropline into the DH II port on your interface module Then plug the other end of the dropline into the jack on the front of the tap Interface Module or O Trunkline 70 f i cs Wg K E i Tap gt B Cap and Chain 7 re NG 7 ee 7 VG Jp o 1 5 A t 5 o 1 FY o Dropline Right angle plug 12650 For more information on mounting and grounding a DH II interface module refer to your interface module user s manual Chapter Data Highway 485 Overview Chapter Overview This chapter explains the following the DH 485 cable system how nodes communic
5. O YY O Q j e 6mm O y 0 2 in O AN Clearance Depth 79mm 77mm 5 in 12644 6 2 Chapter 6 Constructing a DH II Cable System Figure 6 2 shows a tap mounted below an interface module The trunkline runs straight through the side wall of the enclosure Figure 6 2 A tap mounted below an interface module Interface Module O E O g 8 g gt j O me i o e m E ad Ra Qc S Q ss 8 18 eg B S lo o E Q Hoy O Kon O Enclosure Wall sacl lees Dropline a cag EN wy C i fs i Eat Tap 12645 6 3 Chapter 6 Constructing a DH II Cable System Figure 6 3 shows taps mounted on the side of an interface module The trunkline cables run straight through the top of the enclosure Figure 6 3 Taps mounted on the side of an interface module Top of Enclosure Redundant Interface Module O O ooo J 000 000 000 J ao ao OO I lu 8889 9 000 000 0000 Tap Dropline K gt Dropline Le If you do not connect a dropline to the tap place the cap over the dropline jack on the front of the tap
6. 00 cece eee eee eee eee 8 1 Components of a DH 485 Network 0 cee eae 8 2 Necessary Tools 0 0 ccc ccc tence eens 8 3 Guidelines for Determining Cable Length 8 3 Selecting the Number of Link Couplers 0 8 4 I O Raceway Layout Considerations 05 8 4 Constructing a Data Highway 485 Cable System 9 1 Chapter Overview goceciccdicuas chee oneddadweedes debs _9 1 Install the Trunkline and DH 485 Nodes 1 Table of Contents Constructing RS 232 C and Longline Cables Chapter Overview 00 0 eee eee nee eee eee RS 232 C Connections Less than 50 Cable Feet Longline Connections up to 7 000 Cable Feet Who Should Read this Manual How this Manual Is Organized Preface Using this Manual Using this Manual Read this manual if you are planning and or installing a Data Highway DH Data Highway Plus DH Data Highway II DH ID or Data Highway 485 DH 485 cable network We assume that you have a fundamental understanding of electronics and electrical codes This manual explains how to plan and install a DH DH DH II and DH 485 cable system Since the cable systems for the different networks are not alike there are separate instructions For information on the planning and construction of the different cable systems refer to the following chapters If installing a See Chapter Titled Dat
7. RS 232 C 1 1 aa RS 232 C Connector of A Connector of DTE 1771KE 2 3 BB 1771F or 1771KG Module _ 2 BA 4 4 CA RS 032 5 5 cB Pin Assignments 6 e 20 cc AA Protective Ground AB Signal Ground 7 o 7 AB BA Transmitted Data 8 11 BB Received Data CA Request to Send 11 rs 6 cp CB Clear to Send CC Data Set Ready 13 8 CF CD Data Terminal Ready 15 pin Male 25 pin Male CF Received Line Signal Detector Connector Connector A 4 12532 Appendix A Constructing RS 232 C and Longline Cables Figure A 3 Connecting a module to data communication equipment DCE without handshaking RS 232 C 1 1 aA RS232 Connector of A Connector or DCE 1771KE 2 2 BA E g a modem 1771 KF or 1771 KG Module 3 BB i 4 CA Rs 232 5 5 cB Pin Assignments 6 6 cp AA Protective Ground AB Signal Ground 7 7 AB BA Transmitted Data BB Received Data Te 78 CF ca Request to Send 11 20 cc CB Clear to Send CC Data Set Ready 13 25 pin Male CD Data Terminal Ready Connector CF Received Line Signal Detector 15 pin Male Connector 12533 Figure A 4 Connecting a module to data communication equipment DCE with handshaking 1770 CP Cable 16 5 ft RS 232 0 RS 232 0 1 AA Connector of A Connector or DCE 1771KE BA E g a modem 1771KF or B
8. Personal Computer 18662 Chapter 1 DH and DH Overview How Nodes Communicate on DH DH uses token passing protocol to allow nodes on the network to transmit messages over the cable With token passing protocol only the node possessing the token can transmit messages As long as a node possesses the token it is the master This is rotation of link mastership When a node has sent all of its messages or used all of its token hold time it passes the token to the node with the next highest address Token passing continues in this manner until the token is passed to the node with the lowest address When the node with the lowest address is finished with the token the cycle begins again On DH the interface modules control access to the network locally This means if one module faults the other modules continue to communicate on the network Through interface modules nodes on a DH network can communicate with nodes on both DH and DH II networks To communicate with Use this module nodes on DH and Refer to this publication DH 1785 KA Data Highway Data Highway Data Highway Local Area Network Overview pub Plus Communication Adapter Module no 1770 2 39 DH Il 1779 KP5 Data Highway II Data Highway Data Highway II Local Area Network Overview Plus Interface Module pub no 1779 2 10 A message from a node on one network to a node on another network uses message transmission time in both networks To
9. 15 socket Connector 11607 2 7 Chapter 2 Planning a Data Highway or Data Highway Plus Cable System Table 2 A lists the part numbers and manufacturers for the components in the 1770 XG connector kit Table 2 A Manufacturers and part numbers for the 1770 XG connector kit Part Manufacturer Manufacturer Part Number T connector Trompeter BN 73 Jack connector BJ79 9 Plug connector Trompeter PL75 9 15 socket connector ITT Cannon DA 15S Connector and right angle hood DA 51211 Hood 1170F A15S Connector Jack terminator Trompeter TNGB1 1 150 Plug terminator Trompeter TNG1 1 150 The manufacturers listed in Table 2 A may be contacted at the addresses listed below Trompeter Electronics Inc 31186 Labaya Drive Westlake Village CA 91311 ITT Cannon Electric A Division of International Telephone and Telegraph Corporation 666 East Dyer Road Santa Ana CA 92702 Amphenol 4300 Commerce Ct Lisle IL 60532 The 1770 XG connector kit contains a T connector to link one dropline to the trunkline and to connect two trunkline segments together The kit also contains a 15 socket connector which connects the dropline to an interface module on a node Terminators are also included in the kit 2 8 Chapter 2 Planning a Data Highway or Data Highway Plus Cable System Figure 2 4 shows how a network can be constructed using the components of a 1770 XG connector kit Figure 2
10. EN N _h Table of Contents Data Highway Il Overview 00eeeee eens 4 1 Chapter Overview 0 0 c eee eect eee eee 4 i The DH II Cable System 0 eee eee 41 How Nodes Communicate on DH Il 00 000 eee 4 4 Communication Between Networks 000ee aes 4 4 Communication with Synchronous and Asynchronous Devices 4 4 Planning a Data Highway Il Cable System 5 1 Chapter Overview 6c snws tureet atau dee ai cuwedee oaks 5 1 Components of a DH II Network 0 0c e eee eae 5 1 Necessary Tools 0 0 ccc ccc eee eee eens 5 7 Guidelines for Determining Cable Length 5 8 Selecting the Number of Taps 00 cece eeaee 5 10 I O Raceway Layout Considerations 00 5 1 Constructing a Data Highway Il Cable System 6 1 Chapter Overview sc c 0 0eeccge4 anaana 6 1 Installthe Taps 0 eee eee eens 6 1 Prepare the Trunkline Cable for Installation 6 5 Attach the Trunkline Cables and Terminators to the Tap 6 7 Install the DroplineS 00 0 cece cee ees 6 9 Data Highway 485 Overview 200eeee eens 7 1 Chapter Overview ccc eee eee eee eee TA The DH 485 Cable System 0 0 cece eee eee TA How Nodes Communicate on DH 485 00 005 71 2 Planning a Data Highway 485 Cable System 8 1 Chapter Overview
11. Route Conductors To guard against coupling noise from one conductor to another follow the general guidelines shown in Table 5 D when routing wires and cables both inside and outside of an enclosure Where it is stated that cables must be in separate raceways they can be routed in the same ladder or trough if barriers are used as required and defined by NEC to provide the separation specified in Table 5 D Use the spacing given in these general guidelines with the following exceptions where connection points for conductors of different categories on end devices are closer together than the specified spacing application specific configurations for which the spacing is described in a publication for that specific application Route this category of conductor cables Category 1 Category 2 Category 3 Chapter 5 Planning a DH II Cable System Table 5 D Follow these guidelines for routing cables According to these guidelines These conductors can be routed with machine power conductors of up to 600V ac feeding up to 100 hp devices if this does not violate local codes General guidelines these guidelines apply in all cases e If it must cross power feed lines it should do so at right angles e Route at least 5 ft from high voltage enclosures or sources of rf microwave radiation e Ifthe conductor is in a metal wireway or conduit each segment of that wireway or conduit must be bonded to each adjacent s
12. 8888 8888 8 89 E Link 7 j Coupler SLC 500 1747 AIC Controller Personal Computer with 1784 KR Installed 1747 C11 Cable 17680 Trunkline Nodes on the trunkline are interconnected in a daisy chain fashion The length of your trunkline depends upon the location of the nodes in your network however the maximum length is 4 000 feet 1220 meters Your cable system has the capability of interconnecting up to 32 devices 8 2 Necessary Tools Guidelines for Determining Cable Length Chapter 8 Planning a DH 485 Cable System The trunkline is constructed of Belden 9842 cable This cable is jacketed and shielded and consists of two twisted wire pairs and a drain wire One pair of twisted wires provides a balanced signal line and one wire of the other pair serves as a common reference line between all nodes on the link The shield reduces the effect of electromagnetic noise from the industrial environment on the link communications The drain wire provides a shield connection point Refer to Chapter 9 for information on installing the trunkline Link Couplers Link couplers connect devices to the DH 485 network You must install a link coupler for each non isolated node on the network The type of coupler depends upon the device that you are connecting to the DH 485 network Refer to Chapter 9 for information on installing link couplers To install a DH 485 network you need the following tools for connecting the d
13. 1 Remove 3 inches 7 6 cm of the outer jacket foil shield braided shield and filler cords from the mating ends of two trunkline segments 2 Using wire cutters trim the drain wire to a length of 2 inches 5 0 cm 3 Using wire strippers remove 0 5 inch 12 7 mm of insulation from the end of each conductor wire 4 Guide the end of each trunkline segment through one of the cable clamps at the top of the station connector wire to contact the metal box If any of these components contact the A ATTENTION Do not allow the foil shield braid shield or drain metal box the reliability of the link could be significantly reduced 5 Make the following connections on the terminal block 3 13 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System 3 14 Attach these wires To this terminal number Two blue conductor wires one from each trunkline segment Two drain wires one from each 2 trunkline segment Two clear conductor wires one 3 from each trunkline segment 6 Secure the trunkline segments by tightening the cable clamps around them After all of the droplines and trunkline segments have been connected together you must install a 150 ohm terminating resistor at each end of the trunkline Refer to the next section for instructions Terminate the Trunkline To minimize signal reflections from the ends of the trunkline you must attach a 150 ohm 1 2 watt terminating resistor on the
14. Connect this wire To this pin number Blue conductor wire 5 Drain wire 7 Clear conductor wire 1 Blue 5 Twinaxial Cable Drain 7 Clear 1 18767 Go to step 15 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System 13 Attach the dropline to the 15 socket connector and secure each wire with a bead of solder Important In this step take care so that you do not heat the shrink tubing when soldering Connect this wire To this pin number Blue conductor wire 6 Clear conductor wire 8 Drain wire 7 Right angle Hood Clear Small diameter Conductor Shrink Tubing Wire Large diameter TE Shrink Tubing Drain Wire Conductor Wire 15 socket Connector Dropline 10805 Go to step 15 3 6 14 15 16 17 18 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System Attach the dropline to the 62 pin connector Connect this wire To this pin number Blue conductor wire 34 Clear conductor wire 36 Drain wire 35 Slide all three pieces of the small diameter shrink tubing over the solder points at the connector Using a heat gun heat the tubing until the pieces fit snugly on the conductor wires and the drain wire Slide the large diameter shrink tubing as close as possible to the electrical connector Using a heat gun heat the tubing until it fits snugly around the end of the dropline If y
15. trunkline droplines station connectors terminators Use Figure 2 1 for reference when reading about these components Figure 2 1 A DH or DH network PLC2 PLC 3 MiniPLC2 Station Station Station Dropline Dropline Dropline Station Trunkline Station Connector SS lt Connector and Terminator and Terminator Dropline Dropline PLC Computer Station Station Connector Station 19597 2 2 Chapter 2 Planning a Data Highway or Data Highway Plus Cable System Trunkline The trunkline is the bus or the central part of the network cable system The length of the trunkline depends upon the location of the nodes in your network however the maximum length for the trunkline is 10 000 feet 3050 meters The trunkline is constructed of Belden 9463 twinaxial cable Figure 2 2 This cable consists of a twisted pair of conductors wrapped in two layers of shielding and a drain wire Figure 2 2 The trunkline and droplines are constructed of Belden 9463 Twinaxial Cable Filler Cord Braided Shield Foil Shield Insulation Clear Conductor Wire Blue Conductor Wire Insulation Outer Jacket Wire Filler Cord 11606 You can order Belden 9463 twinaxial cable from Allen Bradley in increments of 100 feet 30 5 meters The catalog number is 1770 CD For information on installing the trunkline refer to Chapter 3 Droplines Droplines con
16. test the connector for electrical continuity test the connector for electrical shorts install a 1770 XG connector kit Attach an Electrical Connector to the Dropline Refer to the procedure explained in the section Construct a Network Using 1770 SC Station Connectors and Droplines earlier in this chapter Test the Connector for Electrical Continuity Refer to the procedure explained in the section Construct a Network Using 1770 SC Station Connectors and Droplines earlier in this chapter Test the Connector for Electrical Shorts Refer to the procedure explained in the section Construct a Network Using 1770 SC Station Connectors and Droplines earlier in this chapter Install a 1770 XG Connector Kit Here is a brief outline of the steps you will follow as you install a 1770 XG connector kit solder the jack or plug connector to a cable segment test the connector for electrical continuity connect the cable segments terminate the trunkline Solder the Jack or Plug Connector to a Cable Segment The 1770 XG connector kit comes with a jack connector and two plug connectors Although the internal components of a jack connector and a plug connector differ in appearance the internal components perform the same functions and have the same names Figure 3 5 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System Figure 3 5 The internal components of a jack connector and a plug
17. 3 1 determining cable length 2 12 necessary tools 2 12 using 1770 XG connector kits 3 17 using daisy chain configuration _3 32 devices used on 1 4 dropline specifications of _2 3 overview of _1 4 planning 2 1 raceway layout considerations 2 14 station connector 2 4 trunkline 2 3 Data Highway 485 communication on _7 2 Index components of 8 2 conductors categories 8 4 routing 8 5 construction of _9 1 determining cable length 8 3 necessary tools 8 3 link coupler 8 3 overview of 7 1 planning 8 1 raceway layout considerations 8 4 trunkline 8 2 _9 1 DH See data highway DH Il See data highway II DH See data highway plus DH 485 See data highway 485 Dropline data highway construction of _3 2 specifications of _2 3 testing of 3 7 data highway Il specifications of _5 5 data highway plus construction of _3 2 specifications of 2 3 5 5 testing of _3 7 E Electrical Testing of data highway dropline 3 7 of data highway plus dropline _3 7 G Glossary See terms I O module placement considerations 2 14 5 10 0 8 4 I O raceway layout conductor categories 2 14 5 10 8 4 routing categories 2 15 5 12 8 5 Installing dropline data highway 3 2 data highway plus 3 2 link coupler _ 9 1 station connector data highway 3 9 3 17 data highway plus 3 9 3 17 terminators data highway 3 14 3 30 3 30 data highway plus data highway 485 trunkline dat
18. 4 ra e 4 6 2 a 2 7 o 5 3 3 13 B 4 7 5 8 6 D sub 9 pin g IBM PC AT 11 D sub 15 pin 1785 KE 14936 Figure A 14 A Longline connection between 1771 KE 1771 KF and 1771 KG modules Connect the shield at one end only RS 232 C RS 232 C PORT Connector PORT Connector 1 1 of 1771 E 2 3 of 1771 KE 1771KF or 14 f i 13 1771 KF or 1771KG i i i i 1771KG Module 3 i i lt 2 Module 13 14 4 a 4 5 User supplied cable 5 6 Belden 8723 or Equivalent 6 7000 ft max 8 8 11 11 15 pin Male NOTE User supplied male connectors 15 pin Male Connector Connector 12540 Important For cables longer than 50 feet conductors 2 and 14 and 3 and 13 must be twisted pairs Appendix A Constructing RS 232 C and Longline Cables Figure A 15 A longline connection from a 1771 KE 1771 KF or 1771 KG module to a 1773 KA or 1775 KA module Connect the shield at one end only 1 RS232 C PORT Connector PORT Connector RS 232 C 1 of 1771 KE 2 3 of 1773 KA 1771 KF or 14 l t 25 or 1775KA 1771KG i i i i Module Module 3 lt 2 13 7 4 i w 4 5 User supplied cable 5 6 Belden 8723 or Equivale
19. 3 of the National Electrical Code requires that all conductors ac and or dc in the same raceway must be insulated for the highest voltage applied to any one of the conductors in the raceway Chapter Overview Chapter Constructing a Data Highway or Data Highway Plus Cable System Use this chapter to construct a DH and DH cable system It includes how to construct a network using 1770 SC station connectors and droplines construct a network using 1770 XG connector kits and droplines construct a network using a daisy chain configuration DH only reconfigure a network constructed with droplines and station connectors if necessary Important Before you begin any procedure explained in this chapter read Chapter 2 Planning a Data Highway or Data Highway Plus Cable System for important specifications guidelines and precautions to consider when installing your cable network To Refer to Page Attach an electrical connector tothe dropine 32 Test the connector for electrical shorts 3 7 configuration DH only AddanodetoDHandDHt 33 3 1 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System 3 2 Construct a Network Using 1770 Station Connectors and Droplines Here is a brief outline of the procedures you will follow as you construct your network using 1770 SC station connectors and droplines attach an electrical connector to the dropline test the connector for e
20. Cable a CI i To Data Highway or Data Highway Plus 11276 3 Guide the end of the dropline through the cable clamp on the station connector ATTENTION Do not allow the foil shield braid shield or drain wire to contact the metal box If any of these components contact the metal box the reliability of the link could be significantly reduced Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System 4 Using wire cutters trim the drain wire to the following specifications If the dropline cable is Then 10 100 feet 3 0 30 5 meters in length Trim the dropline cable drain wire to 1 5 inches 3 8 cm and secure it to terminal 7 Less than 10 feet 3 0 meters in length Trim the dropline cable drain wire so it is even with the outer jacket 5 Make the following connections Secure this wire To this terminal number Blue conductor wire 6 Clear conductor wire 8 6 Secure the dropline cable by tightening the cable clamp around it After the dropline is attached to the station connector you must attach the trunkline segments to the station connector Refer to the next section for instructions Connect the Trunkline Segments to the Station Connector After attaching the dropline to the station connector connect a trunkline segment to a station connector by following these steps Important In the next step do not cut the drain wire or conductor wires
21. Connector of A Connector or DTE 1773 KA or 2 3 BB 1775 KA Module 2 BA 4 E E 4 CA Rg 932 5 5 cB Pin Assignments 6 6 cp AA Protective Ground AB Signal Ground 7 ay 7 AB BA Transmitted Data BB Received Data Mite Pi BONE ca Request to Send 20 20 cc CB Clear to Send CC Data Set Ready 25 pin Male CD Data Terminal Ready Connector CF Received Line Signal Detector 25 pin Male Connector A 6 12536 Important For the 1775 KA module you do not have to ground pin 25 as long as switch 3 on the module is turned on closed Appendix A Constructing RS 232 C and Longline Cables Figure A 7 Connecting a module to data terminal equipment DTE with handshaking RS 232 C 1 1 AA RS 232 C Connector of A Connector or DTE 1773 KA or 2 3 BB 1775KA Module 2 BA 5 CB Rs 232 5 4 ca Pin Assignments 6 Le 20 cc AA Protective Ground AB Signal Ground 7 o o 7 AB BA Transmitted Data 8 11 BB Received Data CA Request to Send 20 o 6 cp CB Clear to Send WTA CC Data Set Ready 25 8 CF CD Data Terminal Ready CF Received Line Signal Detector 25 pin Male 25 pin Male Connector Connector 12537 Important For the 1775 KA module you do not have to ground pin 25 as long as switch 3 on the module is turned on closed Figure A 8 Connecting a module to data communication equipment
22. DCE without handshaking RS 2320 1 RS 232 0 1 AA Connector of AN Connector or DCE 1773 KA or BA E g a modem 1775KA BB Module CA RS 232 C cB Pin Assignments cp AA Protective Ground AB Signal Ground AB BA Transmitted Data BB Received Data CF CA Request to Send 20 20 cc CB Clear to Send CC Data Set Ready oo NI OD oOo AJ w N OINI OD oO AJ Ww N 25 25 pin Male CD Data Terminal Ready Connector CF Received Line Signal Detector 25 pin Male Connector 12538 Important For the 1775 KA module you do not have to ground pin 25 as long as switch 3 on the module is turned on closed Appendix A Constructing RS 232 C and Longline Cables RS232 C Connector of 1773 KA or 1775KA Module RS 232 C Connector or DCE E g a modem RS 232 C Pin Assignments AA Protective Ground AB Signal Ground BA Transmitted Data BB Received Data CA Request to Send CB Clear to Send CC Data Set Ready CD Data Terminal Ready CE Ring Indicator CF Received Line Signal Detector Figure A 9 Connecting a module to data communication equipment DCE with handshaking 1 a 1 AA 2 2 BA 3 3 BB 4 4 CA 5 5 CB 6 6 CD 7 be 7 AB 8 8 CF 9 22 CE 20 20 cC 25 11
23. Planning a DH II Cable System 5 4 You must order RG 11 type coaxial cable through the following manufacturers Table 5 A Manufacturers and part numbers for RG 11 type coaxial cable Manufacturer Part Number Allen Bradley 94082901 Carol Astro C0996 20 111 E Alpha 9825C Times AA 5066 For extremely harsh environments order cable with a HALAR jacket through the following manufacturers Manufacturer Part Number Allen Bradley 400037401 Carol Astro 20 111 H HALAR is a registered trademark of Ausimont Chemical These manufacturers can be contacted at the following addresses Allen Bradley Company 747 Alpha Drive Highland Heights OH 44143 Alpha Wire Corp 711 Lidgerwood Ave Elizabeth NJ 07207 Carol Astro Wire amp Cable Corp 50 Gardner St P O Box 246 Worchester MA 01613 Times Fiber Communications Inc 358 Hall Ave P O Box 384 Wallingford CT 06492 For information on installing the trunkline refer to Chapter 6 Chapter 5 Planning a DH II Cable System Droplines and Taps Droplines connect individual nodes to the trunkline They are two feet long and connect directly to the node interface module The catalog number is 1779 XP Important The droplines on your DH II network must be 2 feet 61 cm in length Taps connect the droplines to the trunkline and are supplied with the droplines A trunkline segment must be at least 30 feet 9 2 meters long between taps When yo
24. The Allen Bradley Data Highway II system is a Local Area Network LAN It connects programmable controllers computers and other devices so they can communicate and exchange data with one another Cables are the physical means of transmitting this data between nodes On a DH II network a node is a hardware interface 4 1 Chapter 4 DH II Overview Figure 4 1 shows an example of a DH II network Figure 4 1 A typical DH Il cable system PLC 2 1779 KP2 KP2R PLC 3 1779 KP3 KP3R Data Highway Il 1779 KFL KFLR 1779 KMF KMFR 1779 KP5 KP5R Computer Robot IBM PC To Data Highway Plus An R in the product name denotes a redundant module 18770 You can also order your DH II interface modules with a redundant cabling option To use redundant cabling you must choose this option for all the interface modules on your network Redundant cabling modules allow you to run a second trunkline cable between your modules DH II redundant interface modules send signals down both cables The receiving module determines which of the two signals is a better signal By comparing the quality of the signals on each cable the module can use the best signal possible There will also be a backup cable should one cable fail Chapter 4 DH II Overview Figure 4 2 shows a typical redundan
25. a bend radius of less than 3 inches 7 6 cm Bending the cable more than the recommended bend radius may decrease the reliability of the network Selecting the shortest path for routing the cable helps minimize the amount of cable you need The specific details of planning such a cable route depends upon the needs of your network A ATTENTION When determining cable lengths do not allow tension to be exerted on the cable Tension on the cable can damage the cable and connectors To minimize tension allow sufficient slack in the cable 5 9 Chapter 5 Planning a DH II Cable System Selecting the Number of Taps I O Raceway Layout Considerations You must install a tap for each node on the network In addition if you plan to add nodes at a later date you should install taps for these additional nodes when you install the initial cable system This will help avoid the disruption of recabling after the network is in operation The I O raceway layout of a system is reflective of where the different types of T O modules are placed in an I O chassis Therefore you should determine I O module placement prior to any layout and routing of wires However when planning your I O module placement segregate the modules based upon the conductor categories published for each I O module so that you can follow these guidelines These guidelines coincide with the guidelines for the installation of electrical equipment to minimize elect
26. achieve the best network performance configure each network so that a minimum of messages cross between them You can do this by grouping stations that need to frequently communicate with each other on the same network In many applications nodes on a DH network need to communicate with devices such as computers color graphic terminals dumb terminals robots computerized numerical controls CNC motion controllers Chapter 1 DH and DH Overview To connect these devices to a DH interface module you must provide your own cable The interface module and cable you use depends upon the type of device you are connecting In this chapter we provided you with a general overview of the DH and DH cable systems You are now ready to plan your network Refer to Chapter 2 Important Chapter 2 provides important specifications guidelines and precautions that you need to know before you construct your DH or DH network Be sure to read Chapter 2 before beginning any construction of your cable system Chapter Overview Chapter Planning a Data Highway or Data Highway Plus Cable System The Data Highway and Data Highway Plus cable systems give you flexibility to design a communication network that is tailored to your particular needs To take full advantage of this flexibility you should spend sufficient time planning how to install your cable system before assembling any of the hardware Important This cha
27. acts as an antenna for network noise Important Remember that a DH or DH network can have no more than 64 nodes Each station connector on the trunkline counts as one of those nodes even if no dropline or device is connected to that station connector Chapter 2 Planning a Data Highway or Data Highway Plus Cable System I O Raceway Layout Considerations 2 14 Control amp ac Power high power conductors that are more Signal amp Communication low power conductors that are The I O raceway layout of a system is reflective of where the different types of I O modules are placed in an I O chassis Therefore you should determine I O module placement prior to any layout and routing of wires However when planning your I O module placement segregate the modules based upon the conductor categories published for each I O module so that you can follow these guidelines These guidelines coincide with the guidelines for the installation of electrical equipment to minimize electrical noise inputs to controllers from external sources in IEEE standard 518 1982 Categorize Conductors Segregate all wires and cables into the three categories shown in Table 2 B Refer to the publication for each I O module for the conductor category classification of each I O line Table 2 B Follow these guidelines for grouping conductors Into this category Group conductor cables fitting this description Category 1 tolerant
28. adding _3 33 choosing number of data highway 2 13 Index 1 3 data highway plus 2 13 choosing type of data highway 2 4 data highway plus 2 4 removing 3 34 T Tap choosing number of 5 10 components of 5 5 ordering 5 6 Terminator for data highway 2 11 for data highway plus 2 11 Terminators for data highway 3 14 3 30 for data highway II 5 6 ordering 5 7 for data highway plus for data highway 485 Terms definition of _ii Tools for constructing network data highway 2 12 data highway II 5 7 ordering _5 7 data highway plus 2 12 data highway 485 8 3 3 14 3 30 9 5 Trunkline installation of data highway 485 _9 1 specifications of data highway 2 3 data highway II 5 3 data highway plus 2 3 data highway 485 8 2 W Wires and cables categories 2 14 5 10 8 4 routing 2 15 5 12 8 5 PLC is a registered trademark of Allen Bradley Company Inc The following are trademarks of Allen Bradley Company Inc Pyramid Integrator CVIM SLC SMC RediPANEL PHOTOSWITCH Advisor VIM EXPERT Multiprogramming Pro Spec DataMyte FAN FANLINK and DataTruck are registered trademarks of DataMyte Corporation DEC MicroVAX VAX VAXcluster VMS DECnet PDP and RSX are trademarks of Digital Equipment Corporation IBM is a registered trademark of International Business Machines Corporation Ethernet is a trademark of Intel Corporation Xerox Corporation and Digital Equipment Corporatio
29. class 1 e corresponds to IEEE levels 3 low susceptibility amp 4 power Signal amp Communication low power conductors that are Category 2 less tolerant of electrical noise than category 1 conductors and should also cause less noise to be picked up by adjacent conductors they connect to sensors and actuators relatively close to the I O modules e corresponds to NEC article 725 classes 2 amp 3 e corresponds to IEEE levels 1 high susceptibility amp 2 medium susceptibility Category 3 Intra enclosure Interconnect the system components within an enclosure e corresponds to NEC article 725 classes 2 amp 3 e corresponds to IEEE levels 1 high susceptibility amp 2 medium susceptibility Examples ac power lines high power digital ac I O lines to connect ac I O modules rated for high power and high noise immunity high power digital dc I O lines to connect dc I O modules rated for high power or with input circuits with long time constant filters for high noise rejection They typically connect devices such as hard contact switches relays and solenoids analog I O lines and dc power lines for analog circuits low power digital ac dc I O lines to connect to I O modules that are rated for low power such as low power contact output modules low power digital dc I O lines to connect dc I O modules that are rated for low power and have input circuits with short time constant filters to detect s
30. node with the lowest address is finished with the token the cycle begins again On DH II the interface modules control access to the network locally This means if one module faults the other modules continue to communicate on the network Through interface modules nodes on a DH II network can communicate with nodes on a DH network To communicate between nodes on a DH II network and a DH network use 1779 KP5 Data Highway I Data Highway Plus Interface Module Refer to the Data Highway II Local Area Network Overview publication 1779 2 10 for more information A message from a node on one network to a node on another network uses message transmission time in both networks To achieve the best network performance configure each network so that a minimum of messages cross between them You can do this by grouping stations that need to frequently communicate with each other on the same network In many applications nodes on a DH H network need to communicate with devices such as computers color graphic terminals dumb terminals robots computerized numerical controls CNC motion controllers Chapter 4 DH II Overview To connect these devices to a DH II interface module you must provide your own cable The interface module and cable you use depends upon the type of device you are connecting For example an asynchronous device that communicates through an RS 232 C port would use RS 232 C cable to
31. of electrical noise than category 2 conductors and may also cause more noise to be picked up by adjacent conductors e corresponds to NEC article 725 class 1 e corresponds to IEEE levels 3 low susceptibility amp 4 power Category 2 less tolerant of electrical noise than category 1 conductors and should also cause less noise to be picked up by adjacent conductors they connect to sensors and actuators relatively close to the I O modules e corresponds to NEC article 725 classes 2 amp 3 e corresponds to IEEE levels 1 high susceptibility amp 2 medium susceptibility Examples e ac power lines e high power digital ac I O lines to connect ac I O modules rated for high power and high noise immunity e high power digital dc I O lines to connect dc I O modules rated for high power or with input circuits with long time constant filters for high noise rejection They typically connect devices such as hard contact switches relays and solenoids e analog I O lines and dc power lines for analog circuits e low power digital ac dc I O lines to connect to I O modules that are rated for low power such as low power contact output modules e low power digital dc I O lines to connect dc I O modules that are rated for low power and have input circuits with short time constant filters to detect short pulses They typically connect to devices such as proximity switches photo electric sensors TTL devices and encoders e
32. of the cone cut off the excess drain wire Cone Assembly l a E d 18740 c Slide the insulating washer over the conductor wires and seat the washer so it is flat against the cone dielectric 3 22 Cone Assembly lee Insulating Washer a IC Conductor Wires 18739 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System d Cut the blue conductor wire and the clear conductor wire to approximately 0 35 inch 8 9 mm as measured from the outside surface of the insulating washer 8 89mm Cone ms 0 35 Conductor Wires Insulating Washer 18741 e Using wire strippers strip approximately 0 10 inch 2 5 mm of insulation off the end of the blue conductor wire f Using wire strippers strip approximately 0 20 inch 5 0 mm of insulation off the end of the clear conductor wire 5 0mm Cone Dey Assembly N t gt Clear Conductor Wire H e U ees Blue Conductor Wire Insulating a al Washer Somm Insulation 0 1 10807B 3 Solder the connector wires a Bend the clear conductor wire so that it is at a right angle to the blue conductor wire Clear Conductor Wire ts h Blue l Conductor Wire TTT y Cone Assem
33. the actual cable path as it is routed in your network Be sure to consider vertical dimensions as well as horizontal dimensions You should always calculate the three dimensional path distance when determining cable lengths How you configure your network determines the lengths of all trunkline segments Important Remember that the maximum cable length of the trunkline is 8 000 feet 2440 meters and that each node on the trunkline reduces the 8 000 feet 2440 meters of available cable by 75 feet 22 9 Also remember that cable segments must be at least 30 feet 9 2 meters in length between taps You should also plan your trunkline cable routing so that the cable bend radius is not less than 6 inches 15 2 cm Figure 5 5 The bend radius for the trunkline cable should not be less than 6 inches 15 2 cm 6 inch 12642 A Chapter 5 Planning a DH II Cable System ATTENTION Do not bend the trunkline cable so that it has a bend radius of less than 6 inches 15 2 cm Bending the cable more than the recommended bend radius may decrease the reliability of the network You should plan your dropline cable routing so that the bend radius for the dropline cable is not less than 3 inches 7 6 cm Figure 5 6 The bend radius for the dropline cable should not be less than 3 inches 7 6 cm 3 inch Ne A IN 12643 ATTENTION Do not bend the dropline cable so that it has
34. the separation specified in the following items e If in a contiguous metallic wireway or conduit route at least 0 08m 3 in from category 1 conductors of less than 20A 0 15m 6 in from ac power lines of 20A or more but only up to 100 kVA 0 3m 1 ft from ac power lines of greater than 100 kVA e f notin a contiguous metallic wireway or conduit route at least 0 15m 6 in from category 1 conductors of less than 20A 0 3m 1 ft from ac power lines of 20A or more but only up to 100 kVA 0 6m 2 ft from ac power lines of greater than 100 kVA For Restricted Applications remote I O DH DH and DH 485 cables can be bundled together with category 1 conductors in a molded composite cable if the application can meet these guidelines e All category 2 conductors must be bundled together inside a common grounded 95 braided shield with 100 aluminum tape shield to separate them from the category 1 conductors in the larger bundle e Category 1 conductors must carry no more than 15A maximum at 120V maximum to power supply loads I O circuit non inductive loads or I O circuit inductive loads that are not switched by hard contacts e The total cable length of the remote I O DH DH or DH 485 link must be limited to 456 meters 1 500 ft maximum Route conductors external to all raceways in the enclosure or in a raceway separate from any category 1 conductors with the same spacing listed for category 2 conductors where possible Article 300
35. to the T connector Figure 3 7 Attachments to the T connecior CN ETT WF A Plug Leg Jack Connector Jack l Jack Plug Connector Plug Connector Trunkline Segment 1 Attach the jack connector of one trunkline segment to the plug leg of the T connector 11618 2 Attach the plug connector of the other trunkline segment to one of the jack legs of the T connector 3 Attach the plug connector of the dropline to the other jack leg of the T connector 4 Repeat steps through 3 for other droplines and trunkline segments After all of the droplines and trunkline segments have been connected together you must install a terminator at each end of the trunkline Refer to the next procedure for instructions Terminate the Trunkline The T connectors on the ends of the trunkline have a dropline and only one trunkline segment connected to each of them This leaves two open or unterminated ends on the trunkline Signals transmitted along the DH cable could reflect off these unterminated ends and interfere with transmissions To minimize signal reflections from the ends of the trunkline you must attach terminators Figure 3 8 to the first and last T connectors on the trunkline The terms first and last refer to the physical location along the trunkline 3 30 Chapt
36. 2 000 to 4 000 feet 610 1220 meters 4 000 to 6 000 feet 1220 1830 meters 6 000 to 7 000 feet 1830 2135 meters The illustrations on the following pages show the pin outs for connecting various devices A 3 Appendix A Constructing RS 232 C and Longline Cables Figure A 1 Connecting a module to an advisor system or other data terminal equipment DTE without handshaking 6171 DHC1 Cable 10 ft RS 232 C 1 oe Connector of AN 1771 KE 2 z eB 1771 KF or 1771KG Module 2 BA i 4 CA 3 5 cB 6 cD 7 AB ed 8 8 CF 11 20 cc 13 25 pin Male 15 pin Male Connector Connector NOTE Depending on your DTE you might have to jumper pins 4 5 and 6 8 20 at the 25 pin connector RS232 C Connector of Advisor System or Other DTE RS 2320 Pin Assignments AA Protective Ground AB Signal Ground BA Transmitted Data BB Received Data CA Request to Send CB Clear to Send CC Data Set Ready CD Data Terminal Ready CF Received Line Signal Detector 12531 Important Depending on your DTE you might have to jumper pins 4 5 and 6 8 20 at the 25 pin connector Figure A 2 Connecting a module to data terminal equipment DTE with handshaking 1770 CG Cable 16 5 ft
37. 25 pin Male 25 pin Male Connector Connector 12539 Important For the 1775 KA module you do not have to ground pin 25 as long as switch 3 on the module is turned on closed Figure A 10 Connecting a 1770 KF2 to an IBM AT without handshaking 2 7 3 RTS 4 cTs 5 DSR 6 DCD 8 DTR 20 25 pin Female 1770 KF2 2 RXD 5 GND 3 TXD 1 DCD 4 DTR 6 DSR 7 RTS 8 CTS 9 socket IBM AT 18771 Appendix A Constructing RS 232 C and Longline Cables Figure A 11 Connecting a 1771 KG KE KF or 1785 KE to a 6121 AAS with handshaking 2 2 3 3 6 4 8 1 11 6 f 5 13 7 4 8 2 9 pin Female 15 pin Male 6121 AAS 1771KG KE KF 1785 KE dai Figure A 12 Connecting a 1770 KF2 to a 6121 AAS with handshaking 2 2 3 3 6 4 8 1 20 6 i 5 43 ese 4 2 9 pin Female 25 pin Female 6121 AAS 1770 KF2 man A 9 Appendix A Constructing RS 232 C and Longline Cables Figure A 13 Connecting a 1771 KF KG KE or 1785 KE to an IBM PC AT without handshaking
38. 4 A network constructed using the components of a 1770 XG connector kit NODE 15 pin Dropline Connector Jack Plug Connector lt a T connector Connector To Trunkline T connector Plug Connector Trunkline To T connector 18680 2 9 Chapter 2 Planning a Data Highway or Data Highway Plus Cable System Figure 2 5 shows a more detailed view of the T connector plug connectors jack connector and the 15 socket connector and how they connect the network together Important You must assemble the T connector only as shown Figure 2 5 Network connections with a 1770 XG connector kit T connector Jack Jack Leg Leg Plug Connector Dropline i ci Ci n gene CEON E a N ate Plug Connector WH ZA Plug Leg q O Jack Connector M Trunkline Segment 15 socket Connector D S 10803B The T connector has two jack legs and a plug leg A plug connector from the 1770 XG connector kit attaches to each of the jack legs and the jack connector from the kit attaches to the plug leg A dropline attaches to one of the plug connectors and the trunkline attaches to the other plug connector The trunkline also attaches to the jack connector The 15 socket connector attaches to the dropline and then plugs in
39. 5 KE 1771 KF or Advisor Color Graphic System or other data 6171 DHCI cable or RS 232 C cable wired 1771 KG module terminal equipment DTE without handshaking according to Figure A 1 signals data terminal equipment DTE with handshaking 1770 CG cable or RS 232 C cable wired according signals to Figure A 2 data communication equipment DCE without RS 232 C cable wired according to Figure A 3 handshaking signals data communication equipment DCE with 1770 CP cable or RS 232 C cable wired according handshaking signals to Figure A 4 6121 AAS with handshaking RS 232 C cable wired according to Figure A 11 IBM PC AT without handshaking RS 232 C cable wired according to Figure A 13 1771 KX1 module Fisher Controls PROVOX System PCIU 1770 CX1 cable or RS 232 C cable wired according to Figure A 5 1773 KA or 1775 KA module data terminal equipment DTE without RS 232 C cable wired according to Figure A 6 handshaking signals data terminal equipment DTE with handshaking RS 232 C cable wired according to Figure A 7 signals data communication equipment DCE without RS 232 C cable wired according to Figure A 8 handshaking signals data communication equipment DCE with RS 232 C cable wired according to Figure A 9 handshaking signals 1770 KF2 module IBM AT RS 232 C cable wired according to Figure A 10 6121 AAS RS 232 C cable wired according to Figure A 12 If you are constructing your own cable for any of the connections listed in Table A A
40. ALLEN BRADLEY Wy Data Highway Data Highway Plus Data Highway II Data Highway 485 Cable Installation Manual kl Important User Information Because of the variety of uses for this product and because of the differences between solid state products and electromechanical products those responsible for applying and using this product must satisfy themselves as to the acceptability of each application and use of this product For more information refer to publication SGI 1 1 Safety Guidelines For The Application Installation and Maintenance of Solid State Control The illustrations charts and layout examples shown in this manual are intended solely to illustrate the text of this manual Because of the many variables and requirements associated with any particular installation Allen Bradley Company cannot assume responsibility or liability for actual use based upon the illustrative uses and applications No patent liability is assumed by Allen Bradley Company with respect to use of information circuits equipment or software described in this text Reproduction of the contents of this manual in whole or in part without written permission of the Allen Bradley Company is prohibited Throughout this manual we make notes to alert you to possible injury to people or damage to equipment under specific circumstances ATTENTION Identifies information about practices or circumstances that can lead to personal injury or death pro
41. B 1771KG Module CA RS 232 cB Pin Assignments cp AA Protective Ground AB Signal Ground AB BA Transmitted Data CF BB Received Data CA Request to Send 22 cE CB Clear to Send CC Data Set Ready CC CD Data Terminal Ready 13 L 44 CE Ring Indicator CF Received Line Signal Detecto Co Nn oO oo AJ J N oO ol NI DOD a AJ OJN N o 15 pin Male 25 pin Male Connector Connector 12534 A 5 Appendix A Constructing RS 232 C and Longline Cables Figure A 5 Connecting a 1771 KX1 module to a PROVOX system 1770 CX1 Cable 16 5 ft RS232C 1 1 aA RS 232 C Connector of ex Connector of PROVOX 1771 KX1 2 3 BB System PCIU Module 3 2 BA 4 4 CA RS 232 C 5 5 cB Pin Assignments 6 e 20 cc AA Protective Ground AB Signal Ground 7 o o 7 AB BA Transmitted Data BB Received Data ia 6 CD Ca Request to Send 11 8 cF CB Clear to Send Wo CC Data Set Ready 13 11 CD Data Terminal Ready CF Received Line Signal Detector 15 pin Male 25 pin Female Connector Connector 12535 Figure A 6 Connecting a module to data terminal equipment DTE without handshaking RS232C 1 1 Aa RS 232 C
42. Check the resistances again If the resistance readings Then Indicate there are no shorts Attach the dropline to the trunkline Refer to the appropriate section later in this chapter Indicate that a short exists The short is probably inside the dropline cable Discard the dropline cable and attach the electrical connector to a new piece of cable You may remove the connector from the discarded dropline and reuse it on the new dropline Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System Connect the Cable Segments Once you have soldered the connectors to the dropline and trunkline segments you must link these cable segments together To do this use the T connector from the connector kit Use Figure 3 6 for reference when connecting the cable segments Figure 3 6 Connect the trunkline and droplines T connector l Plug Connector Yi Trunkline A Segment Jack Connector Trunkline Segment 5 Dropline T connector FT as 1 lt A Dropline Z bee i A ji N I T connector j Jack Connector Trunkline Segment 11617 3 29 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System Figure 3 7 shows a more detailed view of the attachments
43. O O O O S 8 3 8 S 8 E 28 28 5 Te fi TT m g re Hg re ll ce H 3 3 Terminator g 8 o 8 Terminator S o E o E l o G C Loig c ig C Lof I a 2 oU o Tap o o oU fay o Dropline lt Interface Module 14638 5 2 Chapter 5 Planning a DH II Cable System Trunkline The trunkline is the bus or the central part of the network cable system The length of the trunkline on your network depends upon the number of nodes you require however the maximum length is 8 000 feet 2440 meters Each node on the trunkline reduces the 8 000 feet 2440 meters of available trunkline length by 75 feet 22 9 meters For example if your network requires 20 nodes the maximum total length of your trunkline is 8 000 20 x 75 6 500 feet or 2440 20 x 22 9 458 meters The trunkline on your network is divided into several segments by taps The cable length of the trunkline is equal to the total cable length of the trunkline segments Each cable segment must be at least 30 feet 9 2 meters in length between taps The trunkline is constructed of RG 11 type coaxial cable Allen Bradley part no 94082901 This cable has a foil shield and a braided shield Figure 5 2 Figure 5 2 The RG 11 type coaxial cable has a foil shield and a braided shield Braided Shield Foil Shield Inner Conductor Dielectric Insulating Jacket 16047 5 3 Chapter 5
44. Seau Pin Dielectric Hole in Large End of Pin 18731 Slide the shield over the pin assembly and seat the shield against the insulating washer Make sure the clear conductor wire extends through the notch in the large end of the shield Wrap the clear conductor wire around the groove in the shield Solder the clear conductor wire to the shield making sure the solder flows well to produce a good connection Do not allow the solder or the wire to extend above the ridges of the shield Clear Conductor Wire ill Shield HiT y g T Ridge of Shield Insulating Groove in Shield Washer 10808B ATTENTION To avoid burning yourself allow the shield and solder to cool to room temperature before proceeding to the next step Carefully remove any excess solder from the surface of the shield 3 25 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System 4 Install the jack or plug connector a Slip the shield dielectric over the shield assembly Shield p b Push the connector body over the shield dielectric and engage the threads of the wrench crimp nut Shield Dielectric 18738 ATTENTION In the next step be sure to adhere to the torque A specification Over tightening the crimp nut may damage the connector and under tightening the crimp nut may create a loose co
45. Segment Node to be rj N 3 N H Disconnected H RS A aag Jack Fr Connector E Trunkline Segment 11619 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System 2 Connect the mating ends of the two trunkline segments you disconnected from the T connector Reconnect Trunkline Segments here T Connector Trunkline Segment cee H Q 2 7 F Tii N i Node Remove Trunkline Segment ne it 11620 3 If possible remove the T connector and dropline from the site and store them for future use Permanently Remove an End Node on a Network Constructed with a 1770 XG Connector Kit To permanently remove an end node either the first or last node on the trunkline linked to the network by a 1770 XG connector kit follow these steps 1 Disconnect the trunkline segment from the T connector that is connected to the node you want to remove Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System 2 Disconnect the jack terminator or plug terminator from the T connector NTN
46. System In this chapter we explain how to construct a Data Highway 485 cable system including how to Install the trunkline and DH 485 nodes Important Before you begin any procedure explained in this chapter read Chapter 8 Planning a DH 485 Cable System for important guidelines and precautions to consider when installing your cable network A DH 485 cable system is constructed in a daisy chain configuration In this chapter we explain how to construct a DH 485 network Non isolated modules require 1747 AIC link couplers to attach them to the network The procedure for installing the trunkline and DH 485 nodes involves the following steps prepare the cable wire connect the cable to the DH 485 node terminate the DH 485 shield terminate the DH 485 network 9 1 Chapter 9 Constructing a DH 485 Cable System Figure 9 1 shows an example of a DH 485 network Figure 9 1 An example DH 485 network O Link ag J Coupler 8888 888 898 1747 AIC SLC 500 gt Controller H 1747 C11 Cable Communication O O O Gable 3 Li
47. a Highway Plus Cable System Daisy Chaining DH only Necessary Tools Determining Cable Length You need one 1770 XG connector kit for each node you want to link to the DH network The 1770 XG connector kit may be used on a DH or DH network For information on installing a 1770 XG connector kit refer to Chapter 3 If you prefer not to use station connectors and droplines on your DH network you may interconnect nodes in a daisy chain fashion For more information on daisy chaining refer to Chapter 3 To install a DH or DH cable system you need the following tools rosin core solder multimeter with needle probes soldering pencil with fine point tip for installing 1770 XG connectors wire cutters wire strippers heat gun pair of small needlenose pliers preferably with smooth jaws small vice preferably with smooth jaws The trunkline on your network is divided into several segments The cable length of the trunkline is equal to the total cable length of the trunkline segments Important When determining the cable length of trunkline segments be sure to measure the actual cable path as it is routed in your network Make sure to consider vertical dimensions as well as horizontal dimensions You should always calculate the three dimensional path distance when determining cable lengths How you configure your DH or DH network determines the lengths of all trunkline segments and droplines Ch
48. a Highway or 1 Data Highway and Data Highway Plus Overview Data Highway Plus Cable Network Planning a Data Highway or Data Highway Plus Cable System 3 Constructing a Data Highway or Data Highway Plus Cable System Data Highway II 4 Data Highway II Overview Cable Network Planning a Data Highway II Cable System ai Constructing a Data Highway II Cable System Data Highway 485 7 Data Highway 485 Overview Cable Network 8 Planning a Data Highway 485 Cable System 9 Constructing a Data Highway 485 Cable System Preface Using this Manual Frequently Used Terms We use the following terms and abbreviations in this manual When you see this term It means Computer The generic term for any intelligent programmable device that can be used with specific interface modules DH Data Highway DH Data Highway Plus DH Il Data Highway II DH 485 Data Highway 485 Dropline Cable that connects a node to a network via a station connector Node The point at which a device such as a programmable controller connects to a network PLC A Programmable Logic Controller the term for any Allen Bradley PLC product line such as the PLC 2 PLC 3 PLC 4 PLC 5 SLC 500 etc Trunkline The bus or central part of a cable system Precautionary Notes In this manual you may see circumstances that can lead to personal injury or death property A ATTENTION Identifies information about practices or damage or economic loss Attention helps you Ide
49. a highway 3 17 3 32 data highway plus 3 17 3 32 data highway 485 _ 9 1 3 14 9 5 L Link Coupler 8 3 choosing number of _8 4 installation of _9 1 Longline Cable construction of _A 3 Manual organization of _i Node adding data highway 3 33 data highway plus _3 33 removing data highway 3 34 data highway plus 3 34 0 Ordering Information cable data highway Il 5 4 station connector 1770 XG _2 8 tap 5 6 terminators _5 7 tools 5 7 Organization of manual _i P Planning installation data highway 2 1 data highway II 5 1 data highway plus 2 1 data highway 485 8 1 Precautionary Notes _ii Products See related products Publications See related publications R Reconfigure Network 3 33 Related Products _ iii Related Publications _iv Routing cables categories 2 16 5 13 8 6 RS 232 C Cable construction of _A 1 S Specifications data highway dropline 2 3 station connector 2 5 2 6 terminators 2 11 trunkline 2 3 data highway II dropline 5 5 tap 5 5 terminators _5 6 trunkline _5 3 data highway plus dropline _2 3 station connector 2 5 2 6 terminators 2 11 trunkline _2 3 data highway 485 link coupler 8 3 terminators _9 5 trunkline 8 2 Station Connector 1770 SC components of 2 5 installation of 3 9 terminating _3 14 1770 XG components of 2 6 installation of 3 17 ordering _2 8 terminators 2 11 3 30 testing of 3 27
50. al Area Networks LANs They connect programmable controllers computers and other devices so they can communicate and exchange data with one another A cable system is the physical means of transmitting this data between nodes On DH and DH networks a node is a hardware interface This manual describes the components of a DH and DH cable system and explains how to construct a network For the most part the components and construction of a DH network are the same as the components and construction of a DH network There are however some differences between the networks The types of devices used on the networks and the communication protocol the networks use are two of the differences we discuss in this chapter This section provides an overview of the Data Highway cable system In this section we talk about devices used on DH how nodes communicate on DH 1 1 Chapter 1 DH and DH Overview Devices Used on DH Figure 1 1 shows devices that can be used on a DH network Important The following illustration is intended only to depict the various devices that can be used on a Data Highway network You should not interpret this illustration to be a representation of how to configure your DH network Figure 1 1 Devices that can be used on a DH network
51. apter 2 Planning a Data Highway or Data Highway Plus Cable System Important Remember that the maximum cable length of the trunkline is 10 000 feet 3050 meters and that dropline cables must be no more than 100 feet 30 5 meters in length If possible keep the dropline cables longer than 10 feet 3 0 meters in length Selecting the shortest path for routing the cable will help minimize the amount of cable you will need The specific details of planning such a cable route depends upon the needs of your network When determining cable lengths be sure to follow the guidelines outlined in the section Harmful Environmental Factors later in this chapter tension to be exerted on the cable Tension on the cable can damage the cable and connectors To minimize tension allow sufficient slack in the cable A ATTENTION When determining cable lengths do not allow Selecting the Number of Whether you plan to use the 1770 SC station connector or the 1770 XG Station Connectors connector kit you must order a connector for each node you want to link to the network If you plan to add nodes at a later date you should order and install the cable and connectors for these additional nodes when you install the initial cable system This will help avoid the disruption of recabling after the network is in operation Important If you install additional station connectors do not install the dropline to the connector An unattached dropline
52. at 120V maximum to power supply loads I O circuit non inductive loads or I O circuit inductive loads that are not switched by hard contacts e The total cable length of the remote I O DH DH or DH 485 link must be limited to 456 meters 1 500 ft maximum Route conductors external to all raceways in the enclosure or in a raceway separate from any category 1 conductors with the same spacing listed for category 2 conductors where possible Article 300 3 of the National Electrical Code requires that all conductors ac and or dc in the same raceway must be insulated for the highest voltage applied to any one of the conductors in the raceway 5 13 Chapter Overview Install the Taps Chapter Constructing a Data Highway Il Cable System In this chapter we explain how to construct a DH II cable system including how to install the taps prepare the trunkline cable for installation attach the trunkline cables and terminators to the tap install the droplines Important Before you begin any procedure explained in this chapter read Chapter 5 Planning a Data Highway II Cable System for important guidelines and precautions to consider when installing your cable network The first step in constructing your DH II cable system is to install the taps When deciding where to mount the taps follow these guidelines can hang from its chain freely without touching a conductive surface If the cap for the dropline jack
53. ata link components together These tools are used to strip the cable and to attach the cable to the link couplers Wire stripper Wire cutter The trunkline on your network is divided into several connected segments that form a daisy chain configuration The cable length of the trunkline is equal to the total cable length of the trunkline segments Important When determining the cable length of trunkline segments be sure to measure the actual cable path as it is routed in your network Be sure to consider vertical dimensions as well as horizontal dimensions You should always calculate the three dimensional path distance when determining cable lengths How you configure your DH 485 network determines the lengths of all trunkline segments Important Remember that the maximum total cable length of the trunkline is 4 000 feet 1220 meters Selecting the shortest path for routing the cable will help minimize the amount of cable you will need The specific details of planning such a cable route depends upon the needs of your network 8 3 Chapter 8 Planning a DH 485 Cable System 8 4 Selecting the Number of Link Couplers I O Raceway Layout Considerations tension to be exerted on the cable Tension on the cable can damage the cable and connectors To minimize tension allow sufficient slack in the cable A ATTENTION When determining cable lengths do not allow You must install a link coupler for each non isola
54. ate on DH 485 The DH 485 Cable System Cables are the physical means of transmitting data between nodes On a DH 485 network a node is a hardware interface The DH 485 network passes information between devices on the plant floor The network monitors process parameters device parameters device status process status and application programs to support data acquisition data monitoring program upload download and supervisory control aiy O A Link g Coupler 2 8888 8888 8 7 1747AIC 1747 C11 Cable Communication O O O Cable Link 8 888 Belden N 3 Gouptek o Re HRS Pe 1747AIC 1747 11 Cable 5 5 y O F l a 8883 8888 Be al Link PE Coupler 1747 AIC Personal Computer with 1784 KR Installed 1747 C11 Cable SLC 500 Controller SLC 500 Controller SLC 500 Controller 17680 7 1 Chapter 7 DH 485 Overview 7 2 How Nodes Communicate on DH 485 DH 485 uses token passing protocol to allow nodes on the network to transmit messages over the cables With token passing protoco
55. ay differ This checkout should be done on a per building basis 1 Check the resistance between the following points sockets 6 and 8 on each 15 socket connector the blue and clear wires on each station connector The readings should be 75 ohms plus the resistance of the Belden 9463 cable Belden 9463 has a typical resistance of one ohm per 100 feet The resistance readings should be no less than 75 ohms 1 and no more than 125 ohms 10 If the resistances do not fall within this parameter you must locate and correct the error before network start up 2 Remove the resistors from the end station connectors and check the resistance between sockets 6 and 8 on any 15 socket connector on the network There should be infinite resistance 3 Connect socket 8 to building steel chassis ground The resistance on socket 8 should be 1 000 ohms or less and the resistance on sockets 6 and 7 should be one meg ohms or more If these readings are not found you must locate and correct the problem before network start up If the resistances are within the guidelines outlined above you can start up the network Construct a Network Using 1770 XG Connector Kits and Droplines Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System Here is a brief outline of the procedures you will follow as you construct your network using 1770 XG connector kits and droplines attach an electrical connector to the dropline
56. block of both devices Figure 3 10 Figure 3 10 Terminal connections when nodes are daisy chained Clear Clear f Clear Clear S Twinaxial O Twinaxial Oh Terminating O Drain cable Drain Drain cable Drain Terminating Resistor S Blue Blue O Blue Blue a Mesistor 18769 After connecting all nodes to the DH network you must install a 150 ohm 1 4 watt terminating resistor at each end of the network Figure 3 10 Some DH modules provide an internal resistor option for this purpose Refer to the manual for the particular module you are using to see if this option is available Reconfigure a Network Constructed with Droplines and Station Connectors If Necessary Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System After your DH or DH network has been operating for some time you may find it necessary to add or remove nodes from the network This section explains how to modify a network constructed with droplines and station connectors to accommodate these changes In this section we explain how to add anode to DH and DH remove a node from DH and DH Important This section only describes the changes that must be made to the cable system when you reconfigure the nodes You may need to make programming changes at some or all of the nodes so that the nodes can communicate properly after they have been reconfigured Refer to your interface user s manual for information o
57. bly 18732 3 23 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System 3 24 Tin the end of the blue conductor wire with a light coating of solder ATTENTION To avoid burning yourself allow the wire and solder to cool to room temperature before proceeding to the next step Push the notched insert onto the blue conductor wire so that the insert is flush against the insulating washer The clear conductor wire fits into the notch in the end of the insert Using needlenose pliers grasp the point of the pin and slip the large end of the pin over the end of the blue conductor wire Clear Conductor Wire Insulating Washer ilk Wi Fa a it Insert Conductor Wire 19604 Keeping the pin seated evenly against the notched insert heat the large end of the pin with a soldering pencil and apply a bead of solder through the hole in the large end of the pin ATTENTION To avoid burning yourself allow the pin and solder to cool to room temperature before proceeding to the next step Carefully remove any excess solder from the outside of the pin Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System Slide the pin dielectric over the pin assembly Blue Conductor Wire O gt l a
58. communication cables remote I O extended local 1 0 DH DH 485 RS 232 C RS 422 RS 423 cables to connect between processors or to I O adapter modules programming terminals computers or data terminals Chapter 2 Planning a Data Highway or Data Highway Plus Cable System Group conductor cables fitting this description Into this Examples category Intra enclosure Interconnect the system components Category 3 low voltage dc power cables provide backplane within an enclosure power to the system components e corresponds to NEC article 725 classes 2 amp 3 communication cables to connect between system e corresponds to IEEE levels 1 high susceptibility amp components within the same enclosure 2 medium susceptibility NOTE Remote I O DH and DH networks must be made of catalog number 1770 CD cable or a cable from the approved vendor list DH 485 networks must be made of a cable from the approved vendor list Route Conductors To guard against coupling noise from one conductor to another follow the general guidelines shown in Table 2 C when routing wires and cables both inside and outside of an enclosure Where it is stated that cables must be in separate raceways they can be routed in the same ladder or trough if barriers are used as required and defined by NEC to provide the separation specified in Table 2 C Use the spacing given in these general guidelines with the following exceptions wher
59. connect to a DH II Asynchronous Device Interface 1779 KFL KFLR Refer to Appendix A for wiring diagrams for several devices You must also provide a driver program to allow your device to communicate with DH II For more information on DH II interface modules software interfaces and the devices you can connect to them refer to the Data Highway II Overview Product Data publications 1779 2 10 In this chapter we provided you with a general overview of the DH II cable system and offered other information resources You are now ready to plan your network Refer to Chapter 5 Important Chapter 5 provides important specifications guidelines and precautions that you need to know before you construct your DH II network Be sure to read Chapter 5 before beginning any construction of your cable system 4 5 Chapter Overview Components of a DH Il Network Chapter Planning a Data Highway Il Cable System This DH II cable system gives you flexibility to design a communication network that is tailored to your particular needs To take full advantage of this flexibility you should spend sufficient time planning how to install your cable system before assembling any of your hardware Important This chapter provides important specifications guidelines and precautions that you need to know before you construct your DH II network Read this chapter carefully before beginning any construction of your cable system After reading
60. connector Twinaxial Cable Wrench Crimp Nut Cone _ Cone Dielectric _ insulating Washer 1 14 notched Insert O O a Pin J a Pin Dielectric w L 7 l Shield _ lt a Shield Dielectric O Plug Connector Body Jack E Connector Body 10804 Since the components are so similar the procedure for soldering a jack connector or a plug connector to a cable segment is the same for either connector You can also follow the same procedure whether you are soldering the connector to a dropline or to a trunkline cable segment 3 18 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System Important When using a 1770 XG connector kit droplines will have an electrical connector attached to one end of the dropline and a plug connector soldered to the other end Trunkline segments will have a plug connector soldered to one end of the cable segment and a jack connector soldered to the other end Here is a brief outline of the steps you will follow as you solder a jack or plug connector to a cable segment install the cone assembly prepare the cable for soldering solder the conductor wires install the jack o
61. do not make the cable longer than 50 feet Use Belden 8723 cable which you can purchase from Allen Bradley by catalog number 1778 CR A 2 Longline Connections up to 7 000 Cable Feet Appendix A Constructing RS 232 C and Longline Cables If you are making connections directly between two Allen Bradley interface modules you can often take advantage of a longline communication circuit that lets you extend the link up to 7 000 feet 2135 meters Table A B lists the possible longline connections and lists which cables you may use for the connections Table A B Cables for longline connections 1771 KE 1771 KF or 1771 KE 1771 KF or adapter cable wired according 1771 KG module 1771 KG module toFigure A 14 1773 KA or 1775 KA module adapter cable wired according to Figure A 15 1773 KA or 1775 KA 1773 KA or 1775 KA module adapter cable wired according to module Figure A 16 To construct the adapter cables use Belden 8723 cable which you can purchase from Allen Bradley by catalog number 1778 CR You can make the adapter cable any length up to 7 000 feet 2135 meters but the cable length limits the communication rate on the link Table A C shows the maximum communication rate for a given length of cable Table A C Communication rates for longline connections Cable Length Maximum Communication Rate 19 200 bits second 9 600 bits second 4 800 bits second 2 400 bits second up to 2 000 feet 610 meters
62. e cone assembly causes both shields to flare out Foil Shield Cone Assembly S Conductor gt Wires CI Braided Shield 18737 3 20 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System g Push the cone assembly onto the conductor wires until the foil shield and the braided shield are slightly crimped between the cone assembly and the outer jacket Important In the next step do not cut the drain wire h Using wire cutters carefully cut the foil shield and the braided shield until they are just short of covering the entire tapered portion of the cone Foil and Braided Shields Cone Assembly Drain Wire 10807A 3 21 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System 2 Prepare the cable for soldering A ATTENTION In the next step do not over tighten the vise Over tightening the vise may destroy the outer jacket and the shielding of the cable segment Secure the cable segment in a vise so that the cable end you want to solder is parallel to the ground Wrap the drain wire around the tapered portion of the cone in a spiral fashion You should wrap the drain wire around the tapered portion of the cone at least once Do not allow the drain wire to extend onto the large end of the cone If there is more drain wire than will neatly wrap around the tapered part
63. e connection points for conductors of different categories on end devices are closer together than the specified spacing application specific configurations for which the spacing is described in a publication for that specific application 2 15 Chapter 2 Planning a Data Highway or Data Highway Plus Cable System 2 16 Route this category of conductor cables Category 1 Category 2 Category 3 Table 2 C Follow these guidelines for routing cables According to these guidelines These conductors can be routed with machine power conductors of up to 600V ac feeding up to 100 hp devices if this does not violate local codes General guidelines these guidelines apply in all cases e If it must cross power feed lines it should do so at right angles e Route at least 5 ft from high voltage enclosures or sources of rf microwave radiation e Ifthe conductor is in a metal wireway or conduit each segment of that wireway or conduit must be bonded to each adjacent segment so that is has electrical continuity along its entire length and must be bonded to the enclosure at the entry point For Unrestricted Applications these guidelines apply unless you can meet the restricted application guidelines e Properly shield where applicable and route in a raceway separate from category 1 conductors They can be routed in the same ladder or trough with category 1 conductors if barriers are used as required by NEC to provide
64. e from a DH and DH network depends upon whether you want to remove the node permanently or temporarily In either case you do not need to remove power from an Allen Bradley programmable controller before disconnecting its node from the network The programmable controller continues to control its outputs in a normal fashion even after it is disconnected from the network Disconnection however may cause the loss of some transmitted messages and the activation of REMOTE LOCAL FAULT indicators by the node interface module Temporarily Remove a Node from DH or DH You may want to temporarily remove a node from the network while performing maintenance functions on the node If the maintenance you want to perform can be done quickly such as inserting a new communication adapter module at the node simply unplug the electrical connector from the node interface module Important A disconnected dropline may act as an antenna for signal noise If noise is a problem temporarily disconnect the dropline from the trunkline Permanently Remove a Node From a Network Constructed with a 1770 SC Station Connector To permanently remove a node linked to a network by a 1770 SC station connector follow these steps 1 Disconnect the dropline conductor wires from terminals 6 and 8 of the station connector terminal block 2 Disconnect the drain wire from terminal 7 of the station connector terminal block 3 Loosen the cable clamp on the dropline and
65. e plug body 10 Position the crimping tool over the plug sleeve as close to the plug body shoulder as possible and crimp the plug sleeve The next step is to attach the trunkline cables and terminators to the tap Figure 6 4 shows an example of how to configure the cable segments taps and terminators in a network Figure 6 4 An example of how to configure your network Trunklines Termi ator E than 30 ae Terminator FL jLJ FL J O Tap Tap d O Dropline Dropline two feet two feet Node Node Node 16048 6 7 Chapter 6 Constructing a DH II Cable System 6 8 Use Figure 6 5 for reference when connecting a trunkline segment and a terminator to a tap at the end of your cable system Figure 6 5 Connect a trunkline segment and a terminator to an end tap SN Trunkline Segment Terminator Pe l O N Tap j O g Dropline g O Oo Y Scored y l 12649 Chapter 6 Constructing a DH II Cable System Use Figure 6 6 for reference when connecting two trunkline segments to a tap Figure 6 6 Connect two trunkline segments to a tap oN OED Trunkline Segment Trunkline Segment A IA
66. e same DH or DH network For example if you plan to frequently connect and disconnect a personal computer to and from the network via an asynchronous module you can use a 1770 XG connector kit at that node and 1770 SC connectors at the other nodes The following table lists other factors to consider when selecting a station connector Characteristic 1770 SC Station Connector 1770 XG Connector Kit Initial Installation Screw Terminal Solder Disconnection Reconnection Screw Terminal Plug in Grounding Enclosure Tied to Earth None Ground Enclosure NEMA Type 13 None Mounting Bolt down Enclosure None Testing Required None Electrical Continuity 2 4 Chapter 2 Planning a Data Highway or Data Highway Plus Cable System The following sections describe the two types of station connectors in more detail 1770 SC Station Connector The 1770 SC station connector can be used on either a DH or DH network and can be used instead of the 1770 XG connector kit described later in this chapter You need one 1770 SC station connector for each node you want to connect to the network Each station connector connects one dropline to the trunkline and contains the following components ajunction box with a removable cover aterminal block wired with the following 0 05 mfd 500V DC capacitor terminals 4 and 5 jumper terminals 7 and 9 ground wire terminal 10 earth ground wire with lug a packet containing the fol
67. eee eee aes Precautionary Notes 0 0c c cece cee eee aes Related Products and Publications 00000 Data Highway and Data Highway Plus Overview Chapter Overview x od4s ctikovwecsdeeawee poaSeeee yess The DH and DH Cable Systems 002 00 ee DH OVEWIEW lt crete ensiatabavdsets tend ideas dene DEP OVEIVIOW o oes o hee ened mhboheds di ei ae ed Reeds Planning a Data Highway or Data Highway Plus Cable System 0c cece eee ee een en eens Chapter OQveniew s 0c218stejucoeeadeene sidecseees Components of a Network Constructed with Station Connectors and Droplines 2 iia one atenpdates Mea neea sie whee x Daisy Chaining DH only 2 0 cece eee eee Necessary Tools 0 ccc cece eens Determining Cable Length 0 00 cece eens Selecting the Number of Station Connectors I O Raceway Layout Considerations 005 Constructing a Data Highway or Data Highway Plus Cable System lt i cciccdctediwnadietieuaes ones Chapter Overview 2s 2sckeecssabiseeed a bined veces bias Construct a Network Using 1770 Station Connectors and Droplines Construct a Network Using 1770 XG Connector Kits and Droplines Construct a Network Using a Daisy Chain Configuration DH Only Reconfigure a Network Constructed with Droplines and Station Connectors If Necessary 0 000 U U Li Es i os a a 1 1 1 js
68. egment so that is has electrical continuity along its entire length and must be bonded to the enclosure at the entry point For Unrestricted Applications these guidelines apply unless you can meet the restricted application guidelines e Properly shield where applicable and route in a raceway separate from category 1 conductors They can be routed in the same ladder or trough with category 1 conductors if barriers are used as required by NEC to provide the separation specified in the following items e Ifin a contiguous metallic wireway or conduit route at least 0 08m 3 in from category 1 conductors of less than 20A 0 15m 6 in from ac power lines of 20A or more but only up to 100 kVA 0 3m 1 ft from ac power lines of greater than 100 kVA e f notin a contiguous metallic wireway or conduit route at least 0 15m 6 in from category 1 conductors of less than 20A 0 3m 1 ft from ac power lines of 20A or more but only up to 100 kVA 0 6m 2 ft from ac power lines of greater than 100 kVA For Restricted Applications remote I O DH DH and DH 485 cables can be bundled together with category 1 conductors in a molded composite cable if the application can meet these guidelines e All category 2 conductors must be bundled together inside a common grounded 95 braided shield with 100 aluminum tape shield to separate them from the category 1 conductors in the larger bundle e Category 1 conductors must carry no more than 15A maximum
69. enia e South Africa Republic e Spain e Switzerland e Taiwan e Thailand The Netherlands Turkey United Arab Emirates United Kingdom e United States e Uruguay Venezuela Yugoslavia World Headquarters Allen Bradley 1201 South Second Street Milwaukee WI 53204 USA Tel 1 414 382 2000 Fax 1 414 382 4444 Publication 1770 6 2 2 April 1994 P N 404635202 Supersedes Publication 1770 6 2 2 July 1991 Copyright 1994 Allen Bradley Company Inc Printed in USA
70. er 3 Constructing a Data Highway or Data Highway Plus Cable System Figure 3 8 Install terminators to the first and last nodes Y ol Plug Terminator Jack Terminator 11608 Use Figure 3 9 for reference when installing the trunkline terminators Figure 3 9 Terminate the trunkline ANTI uo 7 Trunkline Segment Plug Terminator i Dropline TORNJA a Dropline f S A A Jack Connector Trunkline Segment 11621 1 Attach the plug terminator to the T connector jack leg that does not have a trunkline segment connected to it 2 Attach the jack terminator to the T connector that does not have a trunkline segment connected to its plug leg Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System Construct a Network Using a X gt If you choose you may construct your DH network using a daisy chain Daisy Chain Configuration configuration as shown below DH Only Node Node Node Node 18768 To make daisy chain DH connections connect the twinaxial cable to the corresponding DH connector terminals on the terminal
71. er lines high power digital ac I O lines to connect ac I O modules rated for high power and high noise immunity high power digital dc I O lines to connect dc I O modules rated for high power or with input circuits with long time constant filters for high noise rejection They typically connect devices such as hard contact switches relays and solenoids analog I O lines and dc power lines for analog circuits low power digital ac dc I O lines to connect to I O modules that are rated for low power such as low power contact output modules low power digital dc I O lines to connect dc I O modules that are rated for low power and have input circuits with short time constant filters to detect short pulses They typically connect to devices such as proximity switches photo electric sensors TTL devices and encoders communication cables remote I O extended local 1 0 DH DH 485 RS 232 C RS 422 RS 423 cables to connect between processors or to I O adapter modules programming terminals computers or data terminals low voltage dc power cables provide backplane power to the system components communication cables to connect between system components within the same enclosure NOTE Remote I O DH and DH networks must be made of catalog number 1770 CD cable or a cable from the approved vendor list DH 485 networks must be made of a cable from the approved vendor list Chapter 5 Planning a DH II Cable System
72. first and last station connectors on the trunkline The terms first and last refer to the physical location of the node along the trunkline and not the node s station number To install the terminating resistors refer to Figure 3 3 and follow these steps 1 Connect the dropline to the station connector Refer to the procedure explained earlier in this chapter for instructions 2 Connect the one trunkline segment to the station connector Refer to the procedure explained earlier in this chapter for instructions 3 Slip a one inch 2 5 cm length of shrink tubing over the 150 ohm terminating resistor and connect the leads of the resistor to screw clamp terminals 1 and 3 4 Insert the cable clamp plug into the unused cable clamp on the station connector Tighten the cable clamp to hold the plug securely in place Repeat steps 1 through 4 at the other end of the trunkline After all the necessary connections are made to the station connector you must mount the station connector to a secure foundation Refer to the next section for instructions Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System Mount the Station Connector Now that all the necessary connections are made to the station connector mount the station connector by following these steps 1 Select a secure foundation for mounting the station connector If necessary drill and or tap mounting holes according to the dimensio
73. hort pulses They typically connect to devices such as proximity switches photo electric sensors TTL devices and encoders communication cables remote I O extended local 1 0 DH DH 485 RS 232 C RS 422 RS 423 cables to connect between processors or to I O adapter modules programming terminals computers or data terminals low voltage dc power cables provide backplane power to the system components communication cables to connect between system components within the same enclosure NOTE Remote I O DH and DH networks must be made of catalog number 1770 CD cable or a cable from the approved vendor list DH 485 networks must be made of a cable from the approved vendor list Route Conductors To guard against coupling noise from one conductor to another follow the general guidelines shown in Table 8 B when routing wires and cables both inside and outside of an enclosure Where it is stated that cables must be in separate raceways they can be routed in the same ladder or trough if barriers are used as required and defined by NEC to provide the separation specified in Table 8 B Use the spacing given in these general guidelines with the following exceptions where connection points for conductors of different categories on end devices are closer together than the specified spacing Chapter 8 Planning a DH 485 Cable System application specific configurations for which the spacing is described in a
74. ication Adapter Module User s Manual Data Highway on Broadband Interface Module PLC 3 Communication Adapter Module User s Manual PLC 3 I O Scanner Communication Adapter Module User s Manual Data Highway Data Highway Plus Communication Adapter Module User s Manual Data Highway II Overview Data Highway II PLC 2 Communication Interface Module User s Manual Data Highway Il PLC 3 Communication Interface Module User s Manual Data Highway II Data Highway Plus Interface Module User s Manual Data Highway II Synchronous Interface Module User s Manual Data Highway II Asynchronous Interface Module User s Manual PLC 5 Family Programmable Controllers Communication Interface Module Processor Communication Interface Module PC DH 485 Interface Module Publication Number 1770 6 5 13 1771 6 5 15 1771 6 5 1 1771 6 5 59 1775 6 5 1 1775 6 5 5 1785 6 5 1 1779 2 10 1779 6 5 3 1779 6 5 5 1779 6 5 6 1779 6 5 2 1779 6 5 1 1785 6 6 1 1784 2 31 1784 2 21 1784 2 23 Chapter Overview The DH and DH Cable Systems DH Overview Chapter Data Highway and Data Highway Plus Overview In this chapter we provide you with an overview of the Data Highway and Data Highway Plus cable systems We describe the DH and DH cable systems how nodes communicate on DH how nodes communicate on DH communication between networks The Allen Bradley DH and DH systems are Loc
75. iguous metallic wireway or conduit route at least 0 15m 6 in from category 1 conductors of less than 20A 0 3m 1 ft from ac power lines of 20A or more but only up to 100 kVA 0 6m 2 ft from ac power lines of greater than 100 kVA For Restricted Applications remote I O DH DH and DH 485 cables can be bundled together with category 1 conductors in a molded composite cable if the application can meet these guidelines e All category 2 conductors must be bundled together inside a common grounded 95 braided shield with 100 aluminum tape shield to separate them from the category 1 conductors in the larger bundle e Category 1 conductors must carry no more than 15A maximum at 120V maximum to power supply loads I O circuit non inductive loads or I O circuit inductive loads that are not switched by hard contacts e The total cable length of the remote I O DH DH or DH 485 link must be limited to 456 meters 1 500 ft maximum Category 3 Route conductors external to all raceways in the enclosure or in a raceway separate from any category 1 conductors with the same spacing listed for category 2 conductors where possible Article 300 3 of the National Electrical Code requires that all conductors ac and or dc in the same raceway must be insulated for the highest voltage applied to any one of the conductors in the raceway Chapter Overview Install the Trunkline and DH 485 Nodes Chapter a Constructing a Data Highway 485 Cable
76. l only the node possessing the token can transmit messages As long as a node possesses the token it is the master When a node has sent all of its messages or used all of its token hold time it passes the token to the node with the next highest address Token passing continues in this manner until the token is passed to the node with the lowest address When the node with the lowest address is finished with the token the cycle begins again In this chapter we provided you with a general overview of the DH 485 cable system You are now ready to plan your network Refer to Chapter 8 Important Chapter 8 provides important specifications guidelines and precautions that you need to know before you construct your DH 485 network Be sure to read Chapter 8 before beginning any construction of your cable system Chapter Overview Chapter Planning a Data Highway 485 Cable System The DH 485 cable system gives you flexibility to design a communication network that is tailored to your particular needs To take full advantage of this flexibility you should spend sufficient time planning how to install your cable system before assembling any of the hardware Important This chapter provides important specifications guidelines and precautions that you need to know before you construct your DH 485 network Read this chapter carefully before beginning any construction of your cable system After reading this chapter you will be ready to s
77. lectrical continuity a test the connector for electrical shorts install a 1770 SC station connector network checkout Attach an Electrical Connector to the Dropline The first step in constructing a DH or DH cable system is to attach an electrical connector to the dropline Each dropline in your network must have an electrical connector to plug the dropline into the node interface module The type of electrical connector you attach to the dropline depends upon the device you are connecting to the network Refer to Table 3 A for the most common types of electrical connectors used with the different devices Table 3 A Products that connect to DH or DH and the types of connectors they use If you have this device Use this connector PLC 5 10 12 15 25 3 position terminal block or 9 pin connector 540 3 position terminal block or 8 pin mini DIN 560 3 position terminal block or 8 pin mini DIN 1784 KT KT2 C Cd 62 pin connector 1785 KA3 S Y ST 5 S Ket connector 4775 655 3 position terminal connector or 9 pin connector 5130 RM1 3 position terminal block 4785 KAti s C C d 3 position terminal block 9 pin connector or 15 pin connector 4770 KF2 15 socket connector 4785 KE S CS 3 position terminal block or 9 pin connector 1771 KA2 15 socket connector 14775 KA 15 socket connector 1771 KE KF 15 socket connector 5130 KA o 3 position terminal block Chapter 3 Co
78. les longer than 10 feet 3 0 meters in length To connect the dropline to the station connector follow these steps Use Figure 3 2 for reference when performing steps 1 and 2 Figure 3 2 Prepare the dropline to be attached to the station connector Filler Cord Braided Shield Foil Shield Insulation Clear Conductor Wire Blue Conductor Wire Drain Outer Jacket Wire Filler Cord 11606 Important In the next step do not cut the drain wire or the conductor wires 1 Working from the end of the dropline cable that does not have the electrical connector attached to it remove 3 inches 7 6 cm of the outer jacket foil shield braided shield and filler cords 2 Using wire strippers remove 0 5 inch 12 7 mm of insulation from the end of each conductor wire Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System Use Figure 3 3 for reference when performing steps 3 through 6 Figure 3 3 Connect the dropline to the station connector Trunkline In Trunkline Out lt a ___ Cable Clamp di aD fe oY Yeo oD Os ZD Do aD 0 ND On eae Ground Wire UNS green 12 ga to Earth Ground Dropline
79. lowing D shell cable connector hood 15 socket female connector packet of assembly hardware for the cable connector terminator resistor 150 ohm 1 4 watt shrink tubing cable clamp plug installation instructions For information on installing a 1770 SC station connector refer to Chapter 3 Chapter 2 Planning a Data Highway or Data Highway Plus Cable System 1770 XG Connector Kit The 1770 XG connector kit can be used on a DH or DH network and can be used instead of a 1770 SC station connector explained earlier in this chapter You need one 1770 XG connector kit for each node you want to connect to the network Each 1770 XG connector kit connects one dropline to the trunkline and contains the following components a T connector a jack connector two plug connectors a 15 socket connector a plug terminator a jack terminator Chapter 2 Planning a Data Highway or Data Highway Plus Cable System Figure 2 3 shows the components included in a 1770 XG connector kit Figure 2 3 The components of a 1770 XG connector kit N Plug Terminator Jack Terminator O A T connector oO O H 5 Jack Connector Plug Connectors
80. n NetWare is a trademark of Novell Incorporated 3COM is a trademark of 3COM Corporation UNIX is a trademark of AT amp T ChronOS LNQ and RealRAM are trademarks of Dynapro Systems Inc GRAFIX is a registered trademark of Dynapro Systems Inc EXACT is a trademark of the Foxboro Company PROVOXxX is a registered trademark of Fisher Controls ALLEN BR AD LEY Allen Bradley has been helping its customers improve productivity and quality for 90 years QU 9A ROCKWELLINTERNATIONAL COMPANY A B designs manufactures and supports a broad range of control and automation products worldwide They include logic processors power and motion control devices man machine interfaces and sensors Allen Bradley is a subsidiary of Rockwell International one of the world s leading technology companies With major offices worldwide mammam NZ Algeria Argentina Australia e Austria e Bahrain e Belgium e Brazil e Bulgaria e Canada e Chile e China PRC Colombia Costa Rica e Croatia e Cyprus e Czech Republic e Denmark Ecuador Egypt El Salvador Finland e France e Germany Greece e Guatemala e Honduras Hong Kong e Hungary e Iceland e India e Indonesia e Israel e Italy e Jamaica Japan e Jordan e Korea e Kuwait e Lebanon Malaysia e Mexico e New Zealand e Norway e Oman e Pakistan e Peru e Philippines e Poland e Portugal e Puerto Rico e Qatar e Romania e Russia ClS Saudi Arabia e Singapore Slovakia e Slov
81. n how to make programming changes Add a Node to DH and DH To add a node to a DH and DH network follow these steps 1 Obtain enough connectors and twinaxial cable to construct the additional dropline and trunkline segments necessary for the new node 2 Attach the electrical connector to the dropline as explained in the section Attach an Electrical Connector to the Dropline earlier in this chapter 3 Install the station connector as explained earlier in this chapter in the section Install the 1770 SC Station Connector or Install the 1770 XG Connector Kit Individual nodes can continue to perform their independent functions but disconnecting all nodes may result in the loss of transmitted messages and the activation of REMOTE LOCAL FAULT indicators by the node interface modules A ATTENTION The next step will stop all network communication 4 At each node on the network disconnect the electrical connector from the interface module on the node 5 Connect the new dropline and trunkline segments to the existing network Important If you add the new trunkline segment to either the first or last connectors on the network you must move the terminating resistor to the new termination point on the trunkline 6 Reconnect all droplines to the node interface modules Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System Remove a Node from DH and DH The procedure for removing a nod
82. n the trunkline Figure 5 4 Figure 5 4 A terminator NEL 12640 There will be two unused trunkline jacks one at each end of the trunkline Terminators are supplied in pairs Necessary Tools Chapter 5 Planning a DH II Cable System You can order terminators from the following manufacturer Trompeter Electronics Inc 31186 Labaya Drive Westlake Village CA 91311 The part numbers for the terminators are Component Manufacturer Part Number TNG1 1 150 TNGBJ1 1 150 Plug connector Jack connector For information on installing terminators refer to Chapter 6 To install a DH II cable system you will need a stripping and a crimping tool for RG 11 cable You may use the following tools or equivalents Table 5 B Recommended stripping and crimping tools Part Part Number Crimping Tool AMP 220015 1 Stripping Tool Ideal Industries 45 164 These manufacturers can be contacted at the following addresses AMP Inc Harrisburg PA 17105 Ideal Industries 4450 Becker PI Sycamore IL 60178 5 7 Chapter 5 Planning a DH II Cable System 5 8 Guidelines for Determining Cable Length The trunkline on your network is divided into several segments by taps The cable length of the trunkline is equal to the total cable length of the trunkline segments Important When determining the cable length of trunkline segments be sure to measure
83. nect nodes to the trunkline The length of droplines depends upon your network s specific needs however each dropline must be no more than 100 feet 30 5 meters long If possible keep the dropline cables longer than 10 feet 3 0 meters in length Like the trunkline droplines are constructed of Belden 9463 twinaxial cable For information on installing the droplines refer to Chapter 3 Chapter 2 Planning a Data Highway or Data Highway Plus Cable System Station Connectors Station connectors connect droplines to the trunkline and also link trunkline segments together Important A DH or DH network can have no more than 64 nodes Each station connector on the trunkline counts as one of those nodes even if no dropline or device is connected to that station connector There are two types of station connectors that can be used on a DH or DH network 1770 SC station connector a 1770 XG connector kit The type of station connector you choose for your network depends upon the characteristics of your installation If your installation Because it Requires frequent moving and 1770 XG connector kit Provides plug in type couplings that are quick and reconfiguration of nodes easy to disconnect and reconnect Seldom requires changing a 1770 SC station Provides better physical protection and electrical node connector isolation and does not require any soldering to install You may use both types of connectors on th
84. nk Jg 888 Belden 9842 SS ae 8883 8838 38 1747 AIC SLC 500 Controller T 1747 11 Cable 5 5 y O E J l 8888 Babe 898 w i E Link A j Coupler SLC 500 1747 AIC Controller Personal Computer with 1784 KR Installed 1747 C11 Cable 17680 Ga Constructing a DH 485 Cable System Prepare the Cable Wire Important The wire colors of Belden 9842 cable have changed Refer to the following table to determine the corresponding wire colors of the previous version of Belden 9842 and the current version of Belden 9842 This wire or wire pair on the PREVIOUS Corresponds to this wire or wire pair on the version of Belden 9842 cable CURRENT version of Belden 9842 cable Shield Shield Black White Blue White Stripe White Blue Stripe Black White Blue Stripe White Blue White Stripe Black Red Orange White Stripe White Orange Stripe Black White Orange Stripe Red Orange White Stripe 1 Cut the Belden 9842 cable to a length long enough to route from one node to the next Refer to Determining Cable Length in Chapter 8 for guidelines for determining appropriate cable lengths 2 Remove 1 inch 2 5 cm of the PVC jacket from both ends of the cable segment Important In the next step do not cut the drain wire 3 Remove 1 inch 2 5 cm of the braided shield under the PVC jacket 4 Remove the foil that surrounds the twisted wire pairs and insulation 5 Cut back the two
85. nnection on the shielding c Tighten the wrench crimp nut to 30 40 Ibs in 3 4 4 5 N m Now that the connector body is assembled you must check for electrical continuity as explained in the next procedure Do not remove the cable segment from the vise 3 26 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System Test the Connector for Electrical Continuity After you have assembled the connector body check for any electrical shorts that exist in the connector To do this use a multimeter to measure the resistance between the following points connector body and pin pin and shield shield and connector body Connector Body Plug Connector end view Jack Connector end view Test Connector Body and Pin ____ Pin Shield Plug Connector end view Jack Connector end view Test Pin and Shield Connector Body Shield Plug Connector end view Jack Connector end view Test Shield and Connector Body nese 3 27 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System 3 28 If the readings you obtain indicate that no shorts exist you are ready to connect the cable segments as explained next in this chapter If the readings you obtain indicate a short exists disassemble the electrical connector and the station connector and try to locate and correct the short Check for frayed wire or wire fragments at each end of the wire
86. ns shown in Figure 3 4 Figure 3 4 If necessary drill and or tap mounting holes for the station connector 12 1cm s 4 75 Rai pn A pees ee i Terminal Block 5 1 em 10 8cm 2 0 4 25 0 Ke i 13 5cm W 5 3 ae pe 10 2cm 4 0 8 1cm 14 0cm D 3 2 m L 5 5 Top View Less Cover Side View 11274 2 If you removed the terminal block from the station connector mount the block inside the enclosure 3 Attach the ground wire from the station connector to earth ground The lug on the end of the ground wire accepts a number 10 screw Important In the next step do not pinch any wires between the cover plate and the station connector enclosure Also do not damage the gasket on the cover plate since this can nullify the NEMA type 13 rating of the station connector 4 Attach the cover plate to the station connector 3 15 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System Network Checkout After you have installed your network using 1770 SC station connectors complete the following steps before you attach any modules to the droplines to check the system integrity Important If the trunkline is routed between several building structures building to building ground potential m
87. nstructing a Data Highway or Data Highway Plus Cable System Refer to the following procedure for instructions on how to attach the various electrical connectors to a dropline To attach an electrical connector to a dropline follow these steps 1 Cut the Belden 9463 twinaxial cable to the length desired for a dropline Important Remember a dropline must be no more than 100 feet 30 5 meters in length If possible keep the dropline cables longer than 10 feet 3 0 meters in length Refer to Determining Cable Length in Chapter 2 for guidelines on determining appropriate cable lengths 2 Slip the large diameter piece of shrink tubing over one end of the dropline 3 Using wire strippers remove inch 25 4 mm of the outer jacket from the same end of the dropline Important In the next step do not cut the drain wire 4 Using wire cutters remove the exposed portions of the foil shield braided shield and filler cords from the cable 5 Remove 0 125 inch 3 2 mm of insulation from the end of each conductor wire Filler Cord Braided Shield Foil Shield Insulation Clear Conductor Wire Blue Conductor Wire Insulation Outer Jacket Wire Filler Cord 11606 6 Tin the blue conductor wire the clear conductor wire and the drain wire with solder 3 3 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System If you have a 15 socket connector continue with step 7 If you d
88. nt 6 7000 ft max 8 8 11 20 15 pin Male NOTE User supplied male connectors 25 pin Male Connector Connector 12542 Important For cables longer than 50 feet conductors 2 and 14 and 3 and 13 must be twisted pairs Important For a 1775 KA module turn off open switch 3 on the module Appendix A Constructing RS 232 C and Longline Cables Figure A 16 A longline connection between 1773 KA and 1775 KA modules Connect the shield at one end only RS 232 C i 1 RS 232 CHANNEL x PON CHANNEL connector of 2 n 3 connector of 1773KA or 7 i 25 1773KA or 1775KA 1775KA Module 3 i lt 2 Module 25 i 7 4 _ 4 5 5 6 6 8 8 20 20 12542 Important For cables longer than 50 feet conductors 2 and 7 and 3 and 25 must be twisted pairs Important For a 1775 KA module turn off open switch 3 on the module c Cable data highway construction of using 1770 XG connector kits 3 17 determining length 2 12 dropline specifications 2 3 trunkline specifications 2 3 data highway II construction of 6 1 determining length 5 8 dropline specifications 5 5 ordering 5 4 trunkline specifications 5 3 data highway plus construction of using 1770 XG connector kits _3 17 using daisy chain configuration _3 32 determining length 2 12 dropline specifications 2 3 tr
89. ntify a hazard Avoid the hazard recognize the consequences Important Identifies information that is critical for successful application and understanding of the product ii Preface Using this Manual Related Products and For more information about related Allen Bradley products refer to the Publications following chart Product Catalog Number Data Highway Data Highway Plus Asynchronous Interface 1770 KF2 Module Data Highway Communication Controller Interface Module 1771 KE KF Communication Adapter Module 1771 KA2 Data Highway Data Highway Plus or Remote I O on 1771 KRF Broadband PLC 3 Communication Adapter Module 1775 KA PLC 3 I O Scanner Communication Adapter Module 1775 SR SR5 Data Highway Data Highway Plus Communication Adapter 1785 KA Module Data Highway Il PLC 2 Communication Interface Module 1779 KP2 KP2R Data Highway Il PLC 3 Communication Interface Module 1779 KP3 KP3R Data Highway II Data Highway Plus Interface Module 1779 KP5 KP5R Data Highway II Synchronous Device Interface Module 1779 KFM KFMR Data Highway II Asynchronous Device Interface Module 1779 KFL KFLR lil Preface Using this Manual iv For more information about related Allen Bradley publications refer to the following chart Publication Data Highway Data Highway Plus Asynchronous Interface Module User s Manual Data Highway Communication Controller Interface Module User s Manual Commun
90. o not have a 15 socket connector continue with step 9 7 Remove the screws that attach the right angle hood to the 15 socket connector and separate the hood from the connector Right angle Hood Large diameter Shrink Tubing clear plastic Locking Clip NU QOQOOOO0O QQQOQQO0O Small Screws Small diameter Shrink Tubing clear plastic Cable Clamp J Locking Clip 10806 Large Screw 8 Guide the dropline through the circular hole in the right angle hood 9 Keeping the pins on the electrical connector facing up clamp the connector securely in a vise Do not over tighten the vise 10 Cut the small diameter shrink tubing into three equal pieces and slip one piece over the drain wire one piece over the blue conductor wire and one piece over the clear conductor wire If you have this connector Go to step 3 position terminal block 11 9 pin 12 15 socket 13 62 pin 14 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System 11 Connect the dropline to the 3 position terminal block connector Secure this wire To this terminal Clear conductor wire 1 Drain wire SH Blue conductor wire 2 Terminals on 3 pin terminal block Clear Clear 8 or S Shield Twinaxial cable Shield S SH SH Blue Blue 219 SE 19603 Go to step 15 12 Connect the dropline to the 9 pin electrical connector
91. onship does not require the current master to poll each node to grant permission to transmit information This results in less overhead per transaction and a more efficient network On DH the interface modules control access to the network locally This means if one module faults the other modules continue to communicate on the network Through interface modules nodes on a DH network can communicate directly with nodes on a DH network Nodes on DH networks however cannot communicate directly with nodes on DH II networks To communicate between nodes on a DH network and a DH network use the 1785 KA Data Highway Data Highway Plus Communication Adapter Module Refer to the Data Highway Local Area Network Overview publication 1770 2 39 for more information A message from a node on one network to a node on another network uses message transmission time in both networks To achieve the best network performance configure each network so that a minimum of messages cross between them You can do this by grouping stations that need to frequently communicate with each other on the same network 1 3 Chapter 1 DH and DH Overview DH Overview This section provides an overview of the DH cable system In this section we talk about devices used on DH how nodes communicate on DH Devices Used on DH Figure 1 2 shows the devices that can be used on a DH network Important Figure 1 2 is intended only to depict the vario
92. or its chain touches a conductive surface the reliability of the link could be significantly reduced A ATTENTION Mount the tap so that the cap for the dropline jack Make sure the mounting location is convenient for your trunkline cable routing Make sure the mounting location does not cause the trunkline cable bend radius to be less than 6 inches 15 2 cm Mount the tap at least 2 inches 5 1 cm from the interface module to make sure the interface module has sufficient air flow for cooling 6 1 Chapter 6 Constructing a DH II Cable System Mount the tap no more than 11 inches 28 0 cm from the bottom or left side of the interface module to make sure the dropline cable bend radius is not less than 3 inches 7 6 cm Do not mount the tap in a position that routes the dropline cable over the ac power terminals on the interface module Do not allow the metal shell of the tap to touch a conductive surface If you are using a PLC 3 interface module catalog numbers 1779 KP3 or 1779 KP3R you must mount the tap no more than 5 inches 12 7 cm from the PLC 3 chassis You can mount the tap on the side of the chassis only if the interface module is at the end of the chassis Figure 6 1 shows the dimensions of a tap Figure 6 1 Dimensions of a tap Use No 5 mounting bolts 2 places i A A 38mm 1 5 in 25mm 1 0 in 54mm 2 1 in
93. ou Then Have a 15 socket connector Continues with step 17 Do not have a 15 socket connector Check for electrical continuity and shorts between conductors Refer to the next procedure Position the right angle hood to the 15 socket connector and install the screws through the locking clips Tighten the screws to secure the hood to the connector Insert the cable clamp through the slot in the right angle hood Insert the curved edge of the clamp into the slot first Install the large screw into the slot and tighten it so that the clamp holds the dropline cable securely After the you have soldered the electrical connector to the dropline and assembled the connector you need to check for electrical continuity and shorts between conductors Test the Connector for Electrical Continuity To check for electrical continuity leave the connector secured in the vise and check for continuity between the station connector and the electrical connector or the plug connector and the electrical connector 3 7 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System 3 8 Test the Connector for Electrical Shorts After you have soldered the connector to the dropline you must check for electrical shorts To do this measure the resistance between the blue conductor wire and the drain wire the drain wire and the clear conductor wire the clear conductor wire and the blue conductor wire If the resistance reading
94. perty damage or economic loss Attention helps you Identify a hazard Avoid the hazard recognize the consequences Important Identifies information that is critical for successful application and understanding of the product Summary of Changes Revision Bars Summary of Changes Data Highway Data Highway Plus Data Highway II Data Highway 485 Cable Summary of Changes This release of the publication contains new information for categorizing and routing cables The new information appears in the following three chapters Chapter 2 Planning a Data Highway and Data Highway Plus Cable System I O Raceway Layout Considerations pages 2 14 through 2 16 Chapter 5 Planning a Data Highway II Cable System I O Raceway Layout Considerations pages 5 10 through 5 13 Chapter 8 Planning a Data Highway 485 Cable System I O Raceway Layout Considerations pages 8 4 through 8 6 We call your attention to all of the new information with revision bars A revision bar appears as a thick black line in the margin of the page as shown here Table of Contents Summary of Changes 220eeeeeeeeeeeeee Summary of Changes 0 6c cece eee eee eee Revision Bars soccntecagkeatuye eed dedde Pee eeesehe ky Using this Manual 0 cee eee eee eee eee Who Should Read this Manual 00 00 eeu How this Manual Is Organized 0 0 cesses Frequently Used Terms 0 0 0 cece
95. plication Indicate that a short exists The short is probably inside the dropline cable Discard the dropline cable and attach the electrical connector to a new piece of cable You may remove the connector from the discarded dropline and reuse it on the new dropline Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System Electrical Short Exists and Dropline Has Station Connector Disassemble the electrical connector and the station connector and try to locate and correct the short Check the resistances If the resistance readings Then Indicate there are no shorts Attach the dropline to the trunkline Refer to the appropriate section later in this chapter Indicate that a short exists The short is probably inside the dropline cable Discard the dropline cable and attach the electrical connector to a new piece of cable You may remove the connector from the discarded dropline and reuse it on the new dropline Install the 1770 SC Station Connector Use this section to construct a trunkline using a 1770 SC station connector These procedures apply to both DH and DH networks Here is a brief outline of the procedures you will follow when constructing a trunkline using the 1770 SC station connector connect the dropline to the station connector connect the trunkline segments to the station connector terminate the trunkline mount the station connector Important If necessary install the elect
96. pter provides important specifications guidelines and precautions that you need to know before you construct your DH or DH network Read this chapter carefully before beginning any construction of your cable system After you have read this chapter you will be prepared to begin constructing your DH or DH network This chapter provides information to help you plan a DH or DH cable system including components of a network constructed with station connectors and droplines daisy chaining DH only necessary tools determining cable length selecting the type of station connector selecting the number of station connectors harmful environmental factors After reading this chapter consult schematic and engineering drawings of your plant facility for specific information concerning the best location for installing your cable network Chapter 2 Planning a Data Highway or Data Highway Plus Cable System Components of a Network If you have a DH network you must construct it using station connectors Constructed with Station and droplines If you have a DH network you may use station connectors Connectors and Droplines and droplines or daisy chaining to connect the devices on your network In this section we explain the functions and specifications of the components in a DH or DH network when it is constructed with station connectors and droplines The following components are used to construct a DH or DH network
97. publication for that specific application Table 8 B Follow these guidelines for routing cables Route this category of conductor cables According to these guidelines Category 1 These conductors can be routed with machine power conductors of up to 600V ac feeding up to 100 hp devices if this does not violate local codes Category 2 General guidelines these guidelines apply in all cases e f it must cross power feed lines it should do so at right angles e Route at least 5 ft from high voltage enclosures or sources of rf microwave radiation e Ifthe conductor is in a metal wireway or conduit each segment of that wireway or conduit must be bonded to each adjacent segment so that is has electrical continuity along its entire length and must be bonded to the enclosure at the entry point For Unrestricted Applications these guidelines apply unless you can meet the restricted application guidelines e Properly shield where applicable and route in a raceway separate from category 1 conductors They can be routed in the same ladder or trough with category 1 conductors if barriers are used as required by NEC to provide the separation specified in the following items e Ifin a contiguous metallic wireway or conduit route at least 0 08m 3 in from category 1 conductors of less than 20A 0 15m 6 in from ac power lines of 20A or more but only up to 100 kVA 0 3m 1 ft from ac power lines of greater than 100 kVA e f notin a cont
98. pull the dropline out of the station connector Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System 4 Insert a cable clamp plug into the cable clamp where the dropline used to be Secure the cable clamp plug by tightening the cable clamp Trunkline In Trunkline Out a _ Cable Clamp BO Dor eS oD Os We O AD Or Sa 2 Ground Wire green 12 ga to Earth Ground Dropline Cable y CI Ezi To Data Highway or Data Highway Plus 11276 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System Permanently Remove an Intermediate Node from a Network Constructed with a 1770 XG Connector Kit Important An intermediate node is a node that is not the first or last node on the trunkline To permanently remove an intermediate node from a network constructed with a 1770 XG connector kit follow these steps 1 Disconnect both trunkline segments from the T connector that links the node you want to remove Plug Connector T Connector Dropline of i ye Trunkline
99. r plug connector 1 Install the cone assembly a Slide the wrench crimp nut onto the cable so that the threaded end of the nut is toward the cable end that you are going to solder to the connector Wrench Crimp a Nut WH mm amp Trunkline Segment 18733 Important In the next step be sure you do not damage the foil shield or the braided shield b Using wire strippers remove approximately 1 inch 2 5 cm of the outer jacket from the end of the cable 25 4mm Outer 1 0 Jacket a Braided Foil Shield Shield 18734 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System c Insert the small end of the cone dielectric into the large end of the cone Press both parts together firmly until the rim of the cone dielectric seats evenly against the large end of the cone Cone Gone Dielectric 18735 d Fold back the braided shield and unwrap the foil shield to expose the filler cord and conductor wires Filler Cord Foil Shield Conductor Wires Braided Shield 18736 Important In the next step be sure you do not damage the foil shield or the braided shield e Cut off the exposed portion of the filler cord Replace the braided shield over the cone f Slide the cone assembly over both conductor wires Fit the tapered end of the cone under the foil shield and braided shield so that th
100. rical connector to the dropline as explained in the section Attach an Electrical Connector to the Dropline earlier in this chapter A 1770 SC station connector links a dropline cable to the trunkline and also links two trunkline segments together Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System Figure 3 1 A cable network constructed with 1770 SC station connectors Node Dropline Station Connector Station Station Station Station Connector Connector Connector Connector Dropline Dropline Dropline Dropline Node Node Node Node ___________ Trunkline Cable Distance 10 000 ft Max oa 11275 The first step in constructing a network with 1770 SC station connectors is to connect the dropline to a station connector Refer to the next section for instructions 3 10 Chapter 3 Constructing a Data Highway or Data Highway Plus Cable System Connect the Dropline to the Station Connector Important Remove the terminal block from inside the station connector before attaching the dropline and trunkline segments to the station connector This makes it easier to connect the wires to the screw clamp terminals Important Remember that dropline cables must be no more than 100 feet 30 5 meters in length If possible keep the dropline cab
101. rical noise inputs to controllers from external sources in IEEE standard 518 1982 Categorize Conductors Segregate all wires and cables into the three categories shown in Table 5 C Refer to the publication for each I O module for the conductor category classification of each I O line Table 5 C Chapter 5 Planning a DH II Cable System Follow these guidelines for grouping conductors Into this category Group conductor cables fitting this description Control amp ac Power high power conductors that are more Category 1 tolerant of electrical noise than category 2 conductors and may also cause more noise to be picked up by adjacent conductors e corresponds to NEC article 725 class 1 e corresponds to IEEE levels 3 low susceptibility amp 4 power Signal amp Communication low power conductors that are Category 2 less tolerant of electrical noise than category 1 conductors and should also cause less noise to be picked up by adjacent conductors they connect to sensors and actuators relatively close to the I O modules e corresponds to NEC article 725 classes 2 amp 3 e corresponds to IEEE levels 1 high susceptibility amp 2 medium susceptibility Category 3 Intra enclosure Interconnect the system components within an enclosure e corresponds to NEC article 725 classes 2 amp 3 e corresponds to IEEE levels 1 high susceptibility amp 2 medium susceptibility Examples ac pow
102. s you obtain indicate there are no shorts you are now ready to attach the dropline to a station connector Refer to the section later in this chapter If the resistance readings you obtain indicate an electrical short exists check the other end of the dropline for a station connector If the dropline Then go to this procedure Does not have a station connector Electrical Short Exists and Dropline Does Not Have Station Connector Has a station connector Electrical Short Exists and Dropline Has Station Connector Electrical Short Exists and Dropline Does Not Have Station Connector Check for frayed wire or wire fragments at the electrical connector or at the other end of the cable Check the resistance readings again If the resistance readings Then Indicate there are no shorts Attach a station connector to the dropline Refer to Selecting the Type of Station Connector in Chapter 2 for guidelines on choosing the station connector appropriate for your application Indicate that a short exists Disassemble the electrical connector try to locate and repair the short and test the resistances again After finding and repairing the short test the resistances again If the resistance readings Then Indicate there are no shorts Attach a station connector to the dropline Refer to Selecting the Type of Station Connector in Chapter 2 for guidelines on choosing the station connector appropriate for your ap
103. t cabling configuration Figure 4 2 A redundant cabling configuration Trunkline Cable System A Trunkline Trunkline Trunkline Tap O Tap O Tap C Dropline Dropline Dropline Redundant Redundant Redundant Node Node Node Interface Interface Interface Dropline Dropline Dropline Tap O Tap O Tap 1 O Trunkline Trunkline Trunkline Trunkline Cable System B 16046 For more information on DH II interface modules refer to the Data Highway II Local Area Network Overview publication 1779 2 10 Chapter 4 DH II Overview 4 4 How Nodes Communicate on DH Il Communication Between Networks Communication with Synchronous and Asynchronous Devices DH II uses token passing protocol to allow nodes on the network to transmit messages over the cables With token passing protocol only the node possessing the token can transmit messages As long as a node possesses the token it is the master When a node has sent all of its messages or used all of its token hold time it passes the token to the node with the next highest address Token passing continues in this manner until the token is passed to the node with the lowest address When the
104. tart construction of your DH 485 network This chapter provides information to help you plan a DH 485 cable system including components of a DH 485 network necessary tools guidelines for determining cable length selecting the number of link couplers harmful environmental factors After reading this chapter consult schematic and engineering drawings of your facility for specific information concerning the best location for installing your cable network 8 1 Chapter 8 Planning a DH 485 Cable System Components of a DH 485 In this section we explain the functions and specifications of the following Network components of a DH 485 network trunkline link couplers Use Figure 8 1 for reference when reading about these components Figure 8 1 An example DH 485 network O Link ae 2 Coupler 3 3838 3888 308 1747 AIC SLC 500 D Controller H 1747 C11 Cable Communication O Cable Link T JRB 888 Belden 9842 Souler 5 8888 3388 88 1747 AIC SLC 500 Controller Ty 1747 C11 Cable 5 5 y O P a
105. te Orange Stripe 4 B Belden 9842 Cable aT aan 7 3 COM ieee 2 SHLD hield Drai 1 CHS GND Shield Drain Blue White A Stripe Jumper 18762 Terminate the DH 485 Network To terminate the network jumper node terminal 5 A and terminal 6 TERM on each end of the network Jumper Orange White di elite A 6 TERM eer D 5 A 7 4 B Belden 9842 Cable an ee 7 3 COM o 7 2 SHLD Z 1 CHS GND Shield Drain Blue White Stripe 18761 9 5 Chapter Overview RS 232 C Connections Less than 50 Cable Feet Appendix A Constructing RS 232 C and Longline Cables Appendix A provides information on what types of adapter cables to use when connecting node interface modules to their host processors and to other communication interface modules Where practical we provide a wiring diagram so that you can make your own cable We discuss two types of connections to node interface modules RS 232 C connections less than 50 cable feet or 15 3 meters longline connections up to 7 000 cable feet or 2135 meters Most of the input and output circuits on node interfaces conform to RS 232 C electrical specifications Appendix A Constructing RS 232 C and Longline Cables Table A A lists the RS 232 C compatible connections and lists which cables you can use for those connections Table A A Cables for RS 232 C connections 1771 KE 178
106. ted node on the DH 485 network If you plan to add non isolated nodes at a later date provide additional link couplers when you install the initial cable system This will help avoid the disruption of recabling after the network is in operation The I O raceway layout of a system is reflective of where the different types of T O modules are placed in an I O chassis Therefore you should determine I O module placement prior to any layout and routing of wires However when planning your I O module placement segregate the modules based upon the conductor categories published for each I O module so that you can follow these guidelines These guidelines coincide with the guidelines for the installation of electrical equipment to minimize electrical noise inputs to controllers from external sources in IEEE standard 518 1982 Categorize Conductors Segregate all wires and cables into the three categories shown in Table 8 A Refer to the publication for each I O module for the conductor category classification of each T O line Table 8 A Chapter 8 Planning a DH 485 Cable System Follow these guidelines for grouping conductors Into this category Group conductor cables fitting this description Control amp ac Power high power conductors that are more Category 1 tolerant of electrical noise than category 2 conductors and may also cause more noise to be picked up by adjacent conductors e corresponds to NEC article 725
107. this chapter you will be ready to begin constructing your DH I cable system This chapter provides information to help you plan a DH II cable system including components of a DH II network necessary tools guidelines for determining cable length selecting the number of taps harmful environmental factors After reading this chapter consult schematic and engineering drawings of your plant facility for specific information concerning the best location for installing your cable network In this section we explain the functions and specifications of the following components of a DH II network trunkline droplines and taps terminators 5 1 Chapter 5 Planning a DH II Cable System Use Figure 5 1 for reference when reading about these components Important The following illustration is intended only as a general example of a Data Highway II network You should not interpret this illustration to be a representation of how to configure your DH II network Figure 5 1 Components of a Data Highway II network Trunkline Trunkline O O
108. to the node interface module The terminators plug into the T connector You need to install two terminators one plug terminator and one jack terminator for a complete DH or DH cable system If you order more than one 1770 XG connector kit you will have extra terminators See the next section for more information about terminators 2 10 Chapter 2 Planning a Data Highway or Data Highway Plus Cable System Terminators Figure 2 6 shows the terminators that must be installed in your DH or DH cable system if you use the 1770 XG connector kit These terminators are included in the 1770 XG connector kit You must install two terminators one plug terminator and one jack terminator for a complete DH or DH network Figure 2 6 Two terminators must be installed for a complete DH or DH cable system N r Plug Terminator Jack Terminator 11608 Figure 2 7 illustrates how the terminators can be positioned in a DH or DH network Figure 2 7 Typical placement of terminators in a DH or DH network Mini PLC 2 Station PLC 3 Station PLC 2 Dropline a Terminator Station Dropline Dropline Trunkline Terminator Dropline Computer Dropline Station PLC Station T Connectors Chapter 2 Planning a Data Highway or Dat
109. u order a dropline and tap you also receive two cable plugs These plugs are installed on the ends of trunkline segments and allow the segments to plug into the tap Figure 5 3 shows the components of a tap Figure 5 3 Components of a tap Cable Plugs 2 fo fN Sleeve Pin Body Tap Trunkline Jack o o Mounting Hole 7 i Dropline Jack o Mounting Hole f 8 ae Cap Co00000 M wo Dropline Cable Assembly Straight Plug Right angle Plug N Bea lZ 12638 5 5 Chapter 5 Planning a DH II Cable System 5 6 Each node on a DH II network requires a tap Each tap contains the following components atap box with two trunkline jacks and a dropline jack a cap for covering the dropline jack when there is no dropline attached a 2 foot 61 0 cm dropline cable that connects an interface module to the dropline jack on the tap two cable plugs that connect the trunkline cables to the trunkline jacks on the tap You can purchase additional cable plugs part no 225886 6 from AMP Inc Harrisburg PA 17105 For information on installing droplines and taps refer to Chapter 6 Terminators A terminator cat no 1779 XT must be installed at both unused trunkline jacks on a tap to maintain proper electrical impedance o
110. unkline specifications 2 3 data highway 485 construction of _9 1 determining length 8 3 trunkline specifications 8 2 longline construction of _A 3 RS 232 C construction of _A 1 Cable System data highway See data highway data highway Il See data highway II data highway plus See data highway plus data highway 485 See data highway 485 Communication on data highway 1 2 on data highway plus _1 5 on data highway 485 7 2 Components data highway 485 See data highway 485 Conductor descriptions control and ac power 2 14 5 11 8 5 intra enclosure 2 15 5 11 8 5 signal communication 2 14 5 11 Conductors categories 2 14 5 10 8 4 routing 2 15 5 12 8 5 Index D Data Highway communication on _1 2 components of _2 2 construction of 3 1 determining cable length 2 12 necessary tools 2 12 using 1770 XG connector kits 3 17 devices used on 1 2 dropline specifications of _2 3 overview of _1 1 planning 2 1 raceway layout considerations 2 14 station connector 2 4 trunkline 2 3 Data Highway II components of 5 1 conductors categories 5 10 routing 5 12 construction of 6 1 determining cable length 5 8 necessary tools _5 7 dropline specifications of 5 5 overview of 4 1 planning 5 1 raceway layout considerations _5 10 taps 5 5 trunkline 5 3 Data Highway Plus communication on _1 5 components of 2 2 conductors categories 2 14 routing 2 15 construction of
111. us devices that can be used on a Data Highway Plus network You should not interpret this illustration to be a representation of how to configure your DH network Figure 1 2 Devices that can be used on a DH network T60 Workstation PLC eee SW PLC 2 aes Pyramid Integrator To Data Highway PLCS 8 1785 KA3 ao _ 5130 RM1 i BERG I op a E E Jl hale H T E i af Pe i 1785KA M E LILI A J Iie o eg e ote olim z oa Data Highway Plus gt 1784KT2 1784KT ts l K a R po p 3 it alaja 1785 KE mnt IM E ii SS ees A g iz MoU Personal Personal o U a m Computer Computer Ler pg with 6001F1E2 SW with 6001 F1E SW Pyramid Integrator Toolkit Toolkit 5130 KA Computer
112. w these steps 1 Slide the plug sleeve over the end of the cable segment 2 Using a stripping tool remove 0 7 inch 17 8 mm of the insulating jacket from the end of the cable segment exposing the braid 3 Using a stripping tool remove 0 3 inch 7 6 mm of braid from the end of the cable segment Remove 0 3 inch 7 6 mm of the foil 6 5 Chapter 6 Constructing a DH II Cable System 4 Using a stripping tool remove 0 2 inch 5 1 mm of dielectric from the end of the cable segment exposing the center conductor 17 8mm 0 7 in 7 6mm Plug Sleeve 0 3 in 5 1mm 0 2 in Coaxial Center Cable Conductor i Dielectric Mn Braided Shield and aCKe Foil Shield 12648 5 Push the plug pin as far as possible onto the center conductor of the cable Plug Pin pi Dielectric 12648 6 Using a crimping tool crimp the plug pin onto the center conductor 7 Push the braid back against the dielectric 8 Slide the plug body over the pin and cable end Make sure the neck of the plug body goes under the braid Push the plug body as far as possible onto the cable Braided Shield Plug Body 12648 6 6 Attach the Trunkline Cables and Terminators to the Tap Tap Chapter 6 Constructing a DH II Cable System 9 Slide the plug sleeve over the braid until it butts up against the shoulder of th
113. white insulation strands 6 Cut the white blue stripe wire of the blue white stripe white blue stripe pair It does not have a connection Save the wire for a jumper 7 Remove 25 inch 6 4 mm of coating off the orange white stripe white orange stripe wires Do not tin the wire tips 8 Remove 25 inch 6 4 mm of coating off the white blue stripe wire Do not tin the wire tip 9 3 Chapter 9 Constructing a DH 485 Cable System Connect the Cable to the DH 485 Node 1 Connect the orange white stripe wire of the orange white stripe white orange stripe pair to terminal 5 A 2 Connect the white orange stripe wire of the orange white stripe white orange stripe pair to terminal 4 B 3 Connect the blue white stripe wire of the blue white stripe white blue stripe pair to terminal 3 COM 4 Connect the shield drain wire non jacketed to Terminal 2 SHLD Orange White Ships e TERM White Orange Stripe O at 7 4 B O ee Belden 9842 Cable f 3 COM E I 2 SHLD 2 1 CHS GND Shield Drain Blue White Stripe 18760 9 4 Ca Constructing a DH 485 Cable System Terminate the DH 485 Node Shield Only one of the devices in the network requires an earth ground connection for the shield of the communication cable To provide shield termination jumper terminal 2 SHLD and terminal 1 CHS GND together Orange White Stripe Whi

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