USER MANUAL MODEL 2089 Ultra-miniature, DB-9 EIA/TIA
Contents
1. RJ 45 Cable 4 Wire SIGNAL _ PIN PIN GND ae 7 RCV oer eee 5 XMT ee 6 XMT Be 3 RCV 6st 4 GND ee ea 2 RJ 11 Cable 2 Wire SIGNAL PIN PIN XMT ee 3 XMT ne 4 SIGNAL _ PIN PIN XMT n 4 XMT Di 5 tConnection to ground is optional 13 SIGNAL GNDt XMT RCV RCV XMT GNDt SIGNAL GNDt XMT RCV RCV XMT GNDt SIGNAL XMT XMT SIGNAL XMT XMT 4 2 WIRING FOR MULTIPOINT CIRCUITS The Model 2089 supports multi point applications using either a star or daisy chain topology Both topologies require special wiring as well as specific DIP switch settings for master and slave units Refer to Section 5 0 for multipoint DIP switch settings 4 2 1 STAR TOPOLOGY Using a star topology you may connect several Model 2089s together in a master slave arrangement Maximum distance between the units will vary based upon the number of drops data rate wire gauge etc Call Technical Support for specific distance estimates Figure 5 below shows how to wire the two pair cables properly for a Model 2089 star topology Note that the ground connection is not needed HOST FIRST SLAVE SECOND SLAVE XMT RCV De Deck cere eee RCV XMT RCV Peera a eceaee RCV RCV XMT MAERA S EEE XMT RCV p XMT age esr ee aos ee ans XMT Figure 5 Star wiring for Model 2089 host and slaves 4 2 2 DAISY CHAIN TOPOLOGY Using a daisy2. 600W power dissipation at 1 mS Power Draws operating power from EIA TIA 574 data and control signals no AC power or batteries required If necessary 6 12 VDC can be applied to pin 9 of the EIA TIA 574 interface Temperature 0 to 50 C Humidity 5 to 95 noncondensing Size 2 50 x 1 2 x 75 16 APPENDIX B EIA TIA 574 INTERFACE DB 9 SIGNAL CD 2 RD 3 TD 4 DTR 5 SG FG 6 DSR 7 RTS 8 CTS a Optional 6 12 VDC Power Copyright Patton Electronics Company All Rights Reserved 17 Dear Valued Customer Thank you for purchasing Patton Electronics products We do appreciate your business I trust that you find this user manual helpful We manufacture one of the widest selections of data communications products in the world including CSU DSU s network termination units powered and self powered short range modems fiber optic modems interface converters baluns electronic data switches data line surge protectors multiplexers transceivers hubs print servers and much more We produce these products at our Gaithersburg MD USA facility and can custom manufacture products for your unique needs We would like to hear from you Please contact us in any of the following ways to tell us how you like this product and how we can meet your product needs today and in the futur
3. an ultra miniature package Requiring no AC power or batteries for operation the Model 2089 supports asynchronous communication up to 115 2 Kops over one or two unconditioned twisted pair Distances up to 15 0 miles are attainable at lower data rates 1 2 Kops 19 AWG twisted pair The Model 2089 can handle up to 50 terminal drops in a multipoint polling environment For RS 485 applications requiring hardware handshaking the Model 2089 passes one control signal in each direction The Model 2089 may be configured for high or low impedance carrier may be set to constantly on or controlled by RTS and the unit can operate with or without echo RTS CTS delay may be set for no delay or 8 mS Options for twisted pair connection include terminal blocks with strain relief RU 11 or RJ 45 Silicon Avalanche Diodes provide 600 watts per wire of protection against harmful data line transient surges 3 0 CONFIGURATION The Model 2089 is configured using two PC board mounted 4 position DIP switches This section shows how to access the DIP switches provides an overview of the factory default settings and describes all possible configuration options For instructions on how to configure the Model 2089 for specific applications refer to Section 5 0 3 1 ACCESSING THE DIP SWITCHES The Model 2089 has main PC board and a daughterboard DIP switch S1 is located on the underside of the main PC board see Figure 1 below DIP swi
4. thin to be held by the strain relief assembly you will need to order a different sized strain relief Call Patton s Sales Department at 301 975 1000 10 BEND the top half of the case as necessary to place it over the strain relief assembly Do not snap the case together yet 11 Insert one captive screw through a saddle washer and then insert the captive screw with the washer on it through the hole in the DB 25 end of the case Snap that side of the case closed Repeat the process for the other side This completes the cable installation process 4 1 2 TWISTED PAIR CONNECTION USING RJ 11 OR RJ 45 The RJ 11 and RJ 45 connectors on the Model 2089 s twisted pair interface are pre wired for a standard TELCO wiring environment The signal pin relationships are shown below RJ 11 SIGNAL RJ 45 SIGNAL Toriai GNDt Tisini N C Qt eens RCV PANAR OA GND CEEE XMT EAR RCV terrors XMT ere ere errr XMT D EETA RCV ETRE XMT A Bhs GND Gorete RCV VARASES GND Biricik N C tConnection to ground is optional Continued 12 When connecting two Model 2089s it is necessary to use a crossover cable The diagrams below show how a crossover cable should be constructed for the following environments 4 wire RJ 11 4 wire RJ 45 2 wire RJ 11 or 2 wire RJ 45 RJ 11 Cable 4 Wire SIGNAL PIN PIN GND ene eee 6 RCV Dstt 4 XMT Je 5 XMT A seer 2 RCV Ba enoni 3 GND 6 See 1 Connection to ground is optional
5. DC Power Note The Model 2089 is configured as a DCE Data Communications Equipment and is therefore designed to connect to a DTE Data Termination Equipment If you need to connect the Model 2089 to another DCE device please call Patton Technical Support at 301 975 1007 for details on constructing the proper crossover cable 4 4 OPERATING THE MODEL 2089 Once the Model 20839 is properly installed it should operate transparently as if it were a standard cable connection Operating power is derived from the RS 232 data and control signals there is no ON OFF switch All data signals from the RS 232 and RS 485 interfaces are passed straight through Additionally one hardware flow control signal is passed in each direction 15 APPENDIX A MODEL 2089 SPECIFICATIONS Transmission Format Asynchronous Data Rate Up to 115 200 bps Range Up to 9 miles Serial Interface DB 9 male or female wired as a DCE according to EIA TIA 574 Standard Transmit Line 2 4 wire unconditioned twisted pair Transmit Mode 4 wire full or half duplex 2 wire half duplex Control Signals DSR turns ON immediately after the terminal raises DTR DCD turns ON after recognizing the receive signal from the line CTS turns ON after the terminal raises RTS RTS CTS Delay 8 mSec or no delay Carrier The carrier is switch selected either continuous operation or switched operation controlled by RTS Surge Protection
6. USER MANUAL MODEL 2089 Ultra miniature DB 9 EIA TIA 574 to RS 485 Interface Converter Ps PATTON E FlectronicsTo ISO Part 07M2089 E SALES OFFICE Doc 047043UE J Revised 6 25 98 301 975 1000 TECHNICAL SUPPORT 301 975 1007 http www patton com TIFIED An ISO 9001 Certified Company 1 0 WARRANTY INFORMATION Patton Electronics warrants all Model 2089 components to be free from defects and will at our option repair or replace the product should it fail within one year from the first date of shipment This warranty is limited to defects in workmanship or materials and does not cover customer damage abuse or unauthorized modification If this product fails or does not perform as warranted your sole recourse shall be repair or replacement as described above Under no condition shall Patton Electronics be liable for any damages incurred by the use of this product These damages include but are not limited to the following lost profits lost savings and incidental or consequential damages arising from the use of or inability to use this product Patton Electronics specifically disclaims all other warranties expressed or implied and the installation or use of this product shall be deemed an acceptance of these terms by the user 1 1 RADIO AND TV INTERFERENCE The Model 2089 generates and uses radio frequency energy and if not installed and used properly that is in strict accordance wit
7. chain topology you may connect several Model 2089s together in a master slave arrangement Maximum distance between the units will vary based upon the number of drops data rate wire gauge etc Call Technical Support for specific distance estimates Continued 14 Figure 6 below shows how to wire the two pair cables properly for a Model 2089 daisy chain topology Note that the ground connection is not needed HOST FIRST SLAVE OTHER SLAVE S XMT RCV RCV XMT RCV RCV RCV XMT XMT RCV XMT XMT Figure 6 Daisy chain wiring for Model 2089 host and slaves 4 3 CONNECTION TO THE EIA TIA 574 INTERFACE The Model 2089 is designed to plug directly into the DB 9 serial port of an EIA TIA 574 DTE device PC laptop host If you must use a cable to connect the Model 2089 to the DTE device make sure that it is a straight through cable of the shortest possible length we recommend 6 ft or less The DB 9 connector on the Model 2089 is wired according to the EIA TIA 574 Standard as shown below EIA TIA 574 Standard DB 9 SIGNAL CD 2 RD 3 TD 4 DTR D earen SG FG 6 DSR 7 RTS 8 CTS Q Optional 6 12 V
8. e Web http www patton com Sales E mail sales patton com Support E mail support patton com Phone Sales 301 975 1000 Phone Support 301 975 1007 Fax 301 869 9293 Mail Patton Electronics Company 7622 Rickenbacker Drive Gaithersburg MD 20879 USA We are committed to a quality product at a quality price Patton Electronics is BABT and ISO 9001 certified We meet and exceed the highest standards in the industry CE UL etc It is our business to serve you If you are not satisfied with any aspect of this product or the service provided from Patton Electronics or its distributors please let us know Thank you Burton A Patton Vice President P S Please tell us where you purchased this product
9. e applications are shown in the table below Note Do not change switch settings until you have carefully read Section 3 1 TYPICAL MODEL 2089 APPLICATIONS Switch Point to Point Multi point Settings 4w 4W HDX 2W 4w 2W S1 1 Rev Impedance ON ON ON Master ON Slaves OFF Last Slave ON S1 2 2 wire 4 wire OFF OFF ON OFF ON S1 3 2 wire 4 wire OFF OFF ON OFF ON S1 4 Echo OFF OFF OFF OFF OFF S2 1 Carrier Control OFF ON ON Master OFF ON Slaves ON S2 2 RTS CTS Delay ON ON ON OFF ON 2 3 Xmt Off Imp OFF OFF OFF OFF OFF S2 4 Xmt Off Imp OFF OFF OFF OFF OFF 8 4 0 INSTALLATION Once the Model 2089 is properly configured it is ready to connect to your system This section tells you how to properly connect the Model 2089 to the twisted pair and EIA TIA 574 interfaces and how to operate the Model 2089 4 1 TWISTED PAIR CONNECTION The Model 2089 supports 2 wire or 4 wire communication between two or more EIA TIA 574 devices at data rates to 115 2 Kbps There are two essential requirements for installing the Model 2089 1 These units work in pairs Therefore you must have one Model 2089 at each end of a two twisted pair interface In multipoint environments there must be one Model 2089 at the EIA TIA 574 host and one at each EIA TIA 574 terminal 2 To function properly the Model 2089 needs two twisted pairs of metallic wire These pairs must be unconditioned dry metallic wire be
10. h the manufacturer s instructions may cause interference to radio and television reception The Model 2089 has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC rules which are designed to provide reasonable protection from such interference in a commercial installation However there is no guarantee that interference will not occur in a particular installation If the Model 2089 does cause interference to radio or television reception which can be determined by disconnecting the EIA TIA 574 interface the user is encouraged to try to correct the interference by one or more of the following measures moving the computing equipment away from the receiver re orienting the receiving antenna and or plugging the receiving equipment into a different AC outlet such that the computing equipment and receiver are on different branches 1 2 CE NOTICE The CE symbol on your Patton Electronics equipment indicates that it is in compliance with the Electromagnetic Compatibility EMC directive and the Low Voltage Directive LVD of the Union European EU A Certificate of Compliance is available by contacting Technical Support 1 3 SERVICE All warranty and non warranty repairs must be returned freight prepaid and insured to Patton Electronics All returns must have a Return Materials Authorization number on the outside of the shipping container This nu
11. mately you will want to construct a two pair crossover cable that makes a connection with the two Model 2089s as shown below XMT RCV One P XU eee RCV pres G To Shield Optional G ROV XMT one Bail RCV XMT 6 In a single pair circuit use only the transmit XMT pair as shown below Note If there is a shield around the telephone cable it may be connected to G on the terminal block To avoid ground loops we recommend connecting the shield at the computer end only A ground wire is not necessary for proper operation of the Model 2089 Continued 10 7 When you finish connecting the wires to the terminal block the assembly should resemble the diagram below 8 Place the 2 halves of the strain relief assembly on either side of the telephone wire and press together very lightly Slide the assembly so that it is about 2 inches from the terminal posts and press together firmly If your cable diameter is too small or too large for our strain relief please contact our technical support We have strain relief assemblies to accommodate most cable diameters 9 Insert the strain relief assembly with the wire going through it into the slot in the bottom half of the modem case and seat it into the recess in the case If the telephone wire is too
12. mber may be obtained from Patton Electronics Technical Service 301 975 1007 http www patton com support pation com Packages received without an RMA number will not be accepted Patton Electronics technical staff is also available to answer any questions that might arise concerning the installation or use of your Model 2089 Technical Service hours 8AM to 5PM EST Monday through Friday 2 0 GENERAL INFORMATION Thank you for your purchase of this Patton Electronics product This product has been thoroughly inspected and tested and is warranted for One Year parts and labor If any questions or problems arise during installation or use of this product please do not hesitate to contact Patton Electronics Technical Support at 301 975 1007 2 1 FEATURES e Operates asynchronously point to point or multipoint over 2 or 4 wires e Up to 50 multipoint device drops in a polling environment e Data rates to 115 2 Kbps e Passes transmit amp receive data one control signal each direction No AC power or batteries are required e Variable high low impedance settings Able to operate with or without echo e Carrier can be set as constantly on or controlled by RTS e Ultra miniature size 2 50 x 1 20 x 0 75 e Twisted pair connection via strain relief RU 11 or RJ 45 Silicon Avalanche Diode surge protection 2 2 DESCRIPTION The Model 2089 EIA TIA 574 to RS 485 interface converter provides exceptional versatility in
13. pedance High Intermediate Note Switches S2 3 and S2 4 should be switched simultaneously S2 1 Carrier Control Method The setting for switch S2 1 determines whether the carrier is Constantly On or Controlled by RTS This setting allows for operation in switched carrier multipoint and or hardware handshaking applications S2 1 Setting On Controlled by RTS Off Constantly On 2 2 RTS CTS Delay The setting for switch S2 2 determines the amount of delay between the time the Model 2089 sees RTS and when it sends CTS Note RTS CTS Delay setting should be based upon transmission timing 2 2 Setting On 8 mSec Off no delay S2 3 and S2 4 Transmit Off Impedance Switches S2 3 and S2 4 are set together to determine whether the receiving device sees the impedance of the Model 2089 s transmitter as being high or intermediate when the transmitter is turned off The intermediate setting is useful in half duplex environments where the receiving device does not respond well to the high setting 2 3 2 4 Setting On On Intermediate Impedance Off Off High Impedance 3 2 TYPICAL APPLICATIONS The Model 2089 is commonly used in five types of applications 4 wire full duplex point to point 4 wire half duplex point to point 2 wire half duplex point to point 4 wire multipoint and 2 wire multipoint The switch settings generally needed to configure the Model 1008 for thes
14. tch S2 is located on the top of the daughterboard see Figure 2 below Switch S1 Figure 1 Underside of Model 2089 main PC board showing the location of DIP switch S1 Switch S2 Figure 2 Top of Model 2089 daughter board showing the location of DIP switch S2 4 To access the Model 2089 s internal PC boards insert a small flat blade screwdriver between the connector and the lip of the case and twist gently as shown in Figure 3 below fa Lm ae UT Figure 3 Opening the Model 2089 s plastic case with a small screwdriver Both DIP switch S1 and S2 are marked with individual switch numbers 1 thru 4 Use these numbers as well as the ON designation to orient the switch properly see Figure 4 below Use a small screw driver or similar instrument to set each individual switch ON A ON OFF 1 2 3 4 Figure 4 Close up of DIP switches S1 and S2 showing ON OFF orientation 3 1 2 DIP SWITCH S1 SETTINGS DIP switch S1 is used to configure receive impedance 2 wire 4 wire operation and echo enable disable The summary table below shows the factory default settings for switch S1 Following the summary table is a detailed description of each individual switch SWITCH S1 SUMMARY TABLE factory defaults in bold Position Function OFF Position ON Position 1 1 RCV Impedance 16 kOhm typ 120 Ohm 1 2 2 wire 4 wire 4 wire 2 wire 1 3 2 wire 4 wire 4 wire 2
15. tween 19 and 26 AWG the higher number gauges may limit distance Standard dial up telephone circuits or leased circuits that run through signal equalization equipment are not acceptable For your convenience the Model 2089 is available with several different twisted pair interfaces RJ 11 jack RJ 45 jack terminal blocks with strain relief and dual modular jacks for multipoint daisy chaining 4 1 1 TWISTED PAIR CONNECTION USING TERMINAL BLOCKS If your application requires you to connect one or two pairs of bare wires to the Model 2089 you will need to open the case to access the terminal blocks The following instructions will tell you how to open the case connect the bare wires to the terminal blocks and fasten the strain relief collar in place so the wires won t pull loose 1 You should already have the case open for the configuration procedure If not see Section 3 1 2 Strip the outer insulation from the twisted pair s about one inch from the end 3 Strip the insulation on each of the twisted pair wires about 25 4 In a two pair circuit connect one pair of wires to XMT and XMT transmit positive and negative on the terminal block making careful note of which color is positive and which color is negative 5 Connect the other pair of wires to RCV and RCV receive positive and negative on the terminal block again making careful note of which color is positive and which color is negative Ulti
16. wire 1 4 Echo Mode Echo OFF Echo ON Note Switches S1 2 and S1 3 should be switched simultaneously S1 1 Receive Impedance The setting for switch S1 1 selects the impedance of the input receiver You may select either a low impedance of 120 Ohms or a high impedance of 16 kOhms By selecting the proper impedance for each drop there may be up to 50 receivers in one application 1 1 Setting On Low 120 Ohm Off High 16 kOhm typical 1 2 and 1 3 2 wire 4 wire Modes Switches S1 2 and S1 3 are set together to determine whether the Model 20839 is in 2 wire or 4 wire operating mode Note 2 wire mode is half duplex only 1 2 1 3 Setting On On 2 wire mode Off Off 4 wire mode S1 4 Echo Mode The setting for switch S1 4 determines whether the Model 2089 echoes data back to the transmitting device half duplex mode only 1 4 Setting On Echo On Off Echo Off 3 1 3 DIP SWITCH S2 SETTINGS DIP switch S2 is used to configure carrier control RTS CTS delay and communication protocol The summary table below shows the factory default settings for switch S2 Following the summary table is a detailed description of each individual switch SWITCH S2 SUMMARY TABLE factory defaults in bold Position Function OFF Position ON Position 2 1 Carrier Control Constantly ON RTS 2 2 RTS CTS Delay No Delay 8 mSec 2 3 XMT Off impedance High Intermediate S2 4 XMT Off im
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