CTI 2550 EIGHT CHANNEL ISOLATED ANALOG INPUT
Contents
1. 0000 00 00 00 00 NO 15 0000 00 00 00 00 NO 16 0000 00 00 00 00 NO Figure 21 Example I O Configuration Chart An example chart is shown in the following figure In this example the Model 2550 module is inserted in slot 1 in I O base 1 Data for channel 1 appears in word location WX1 data for channel 2 appears in word location WX2 etc For your particular module look in the chart for the number corresponding to the slot occupied by the module If word memory locations appear on this line then the module is registered in the PLC memory and the module is ready for operation If the line is blank or erroneous re check the module to ensure that it is firmly seated in the slots Generate the PLC memory configuration chart again If the line is still incorrect contact your local distributor or CTI at 1 800 537 8398 for further assistance CTI 2550 Installation and Operation Guide 21 22 CTI 2550 Installation and Operation Guide CHAPTER 3 TROUBLESHOOTING If the module provides improper readings or the status indicator is not on use the following chart to SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION Indicator is not lit Base or PC power is off Turn base or PC on Defective module Return the module to CTI for repair Incorrect inputs Blown fuse Return the module to CTI for repair Wrong addresses for word input Check program for correct word input addresses Not logged in R2. Figure 19 Screw Terminal Plug Wiring CTI 2550 Installation and Operation Guide 19 2 5 1 Connecting Voltage Input Wiring For voltage input circuits connect the signal wire to the positive screw terminal and the return wire to the negative screw terminal The ground terminals labeled G1 through G8 provide a convenient location to terminate the shield Insert the wires in the appropriate holes at the top of the plug directly above the screws When the wires are inserted tighten the screws Repeat this procedure for the remaining voltage input channels 2 5 2 Connecting Current Input Wiring For current input circuits connect the signal wire to the positive screw terminal and the return wire to the negative screw terminal The ground terminals labeled G1 through G8 provide a convenient location to terminate the shield Insert the wires in the appropriate holes at the top of the plug directly above the screws When the wires are inserted tighten the screws Repeat this procedure for the remaining current input channels 2 6 Inserting the Screw Terminal Plug When all the input signal wires are connected to the screw terminal plug carefully insert each plug into its mating header connector on the top and bottom of the module Both the plug and the header are keyed to prevent reverse wiring When the screw terminal plug is fully inserted into the header the WIRE e LOCKING SCREWS my B INPUT SCREW yt TERMINAL
3. 9 1 ACTIVE LED ACTIVE CHANNELS 1 4 CHANNELS 5 8 Figure 2 2550 Front Panel 1 1 1 Active LED The active LED will be illuminated when the module is functioning normally If the Active LED is not lit refer to Chapter 3 for troubleshooting CTI 2550 Installation and Operation Guide 1 1 1 2 Input Connector for Channels 1 4 This connector provides wiring terminals for channels 1 4 1 1 3 Input Connector for Channels 5 8 This connector provides wiring terminals for channels 5 8 1 2 Asynchronous Operation The module operates asynchronously with respect to the PLC a scan of the PLC and input sampling of the module do not occur at the same time Instead the module will translate all analog inputs in one module update 2 milliseconds maximum and store the translated words in buffer memory The PLC retrieves the stored words from the module buffer memory at the start of the I O scan 1 3 Unipolar or Bipolar Mode The module may be configured to accept either bipolar or unipolar input signals Selection of unipolar or bipolar mode is made via two internal jumpers see Section 2 3 3 1 4 Voltage or Current Mode Each of the module s eight channels may be configured to receive either voltage or current analog input signals For unipolar input signals the range is 0 to 5 VDC 0 to 10 VDC or 0 to 20 mA For bipolar input signals the signal range is 5 to 5 VDC 10 to 10 VDC or 20 to 20 mA Select
4. Bipolar bipolar mode CTI 2550 Installation and Operation Guide 5 Typical Digital Word Map for Minimum Digital Word 16 384 64 32 16 BIT 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 MSB TRANSLATED UNUSED LSB SIGN 1 DIGITAL WORD SET TO O IF OVERRANGE 0 SET TO 1 BIPOLAR WORD MAP Figure 8 Minimum Non Underrange Word Value Bipolar 1 6 3 Example Conversion As an example the following figure illustrates the effects of a change in input level going from 1 25 to 2 5 mV in the 0 to 5V Unipolar Input Mode For the 0 to 10V and 0 to 20mA Unipolar Input Modes or the Bipolar Modes refer to the formulas given in Sections 1 6 1 and 1 6 2 to determine the digital LSB 150V3399 8 0 0 o o o of of of of of of of of 0 o 32 16 8 4 2 1 LSB E x 32000 16 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 Figure 9 Example of Change in Input Level word which results from a particular input 6 CTI 2550 Installation and Operation Guide 1 7 Effect of Out of Range Input Signals In Unipolar Mode when the analog signal exceeds the positive limit the translated digital word will exceed 32000 to a maximum of 32760 See Figure 5 Above this point the overrange bit will be set giving an overrange reading of 32761 See Figure 12 Signals falling below
5. Input Mode 020 0005 14 2 3 4 Selecting Digital Filtering 00 0 0 a 15 2 4 Inserting the Module Into the I O Base 16 2 5 Wiring the Input Connectors 0 eh 16 2 5 1 Connecting Voltage Input Wiring 0 0 eee 17 2 5 2 Connecting Current Input Wiring 1 0 0 eee 17 2 6 Inserting the Screw Terminal Plug 0 2 20 0 ee eee 17 2 7 Checking Module Operation lisse eee 18 CHAPTER 3 TROUBLESHOOTING i eder aw oe Sh dne MERGE SC AU se e o 19 CTI 2550 Installation and Operation Guide ix SPECIEICATIONS 3 RERCBRPSERRPRREERRERFERIMERFRO ER Een Ehe RP be gsr ERE 21 JUMPER SETTINGS LOG SHEET Iroa e a E e n m hehehe tete 23 USER NOTES cut ir ttftt ite tst ssi mU i EI MAL ES NS Ae 25 LIMITED PRODUCT WARRANTY ssseeeee e eee eee 27 REPAIR POLICY Lour cras ena en HERE E REO C TE ONERE IER ERRAT EUER 20 x CTI 2550 Installation and Operation Guide TABLE OF FIGURES Figure 1 The Model 2550 8 Channel Isolated Analog Input Module lesus V Figure 2 2550 Front Panel istos Eher seh ne wie e TUR OSA Pn URDU CER Es 1 Figure 3 Word Input to the PLC from the Module Unipolar sees 3 Figure 4 Word Input to the PLC from the Module Bipolar isses 3 Figure 5 Maximum Non Overrange Word Value Unipolar cesse 4 Figure 6 Minimum Non Underrange Word Value Unipolar ccce 4 Figure 7 Maximum Non Overrange Word Value
6. PLUGS i INPUT SIGNAL NE SHIELD CONNECTOR LOCKING TABS 000000000000 SSSSSSSSSSSG eeeoeoooooooo T I O I HEADERS o Se CIRCUIT CARD 000009 OOC 6859896666688 ooo YSN o0 r000d4d0000 Figure 20 Input Connector Wiring locking tabs snap over the connector lip to secure the screw terminal plug to the header 20 CTI 2550 Installation and Operation Guide 2 7 Checking Module Operation First turn on the base supply power If the module diagnostics detect no problems the status indicator on the front of the module will light If the status indicator does not light or goes out during operation the module has detected a failure For information on viewing failed module status refer to your SIMATIC VPU or TISOFT user manual To diagnose and correct a module failure refer to the next section on troubleshooting You must also check that the module is configured in the memory of the PLC This is important because the module will appear to be functioning regardless of whether it is communicating with the PLC To view the PLC memory configuration chart listing all slots on the base and the inputs or outputs associated with each slot refer to your SIMATIC VPU or TISOFT Programming Manual I O MODULE DEFINITION FOR CHANNEL 1 BASE 00 I O NUMBER OF BIT AND WORD I O SPECIAL SLOT ADDRESS X Y WX WY FUNCTION 01 0001 00 00 08 00 NO 02
7. POSITION RANGE POSITION JUMPER Vorl JUMPER 5V or 10V 1 JP 13 JP 14 5V 2 JP 11 l JP 12 5V 3 JP9 JP 10 5V 4 JP7 l JP 8 5V 5 JP 21 JP 22 5V 6 JP 19 JP 20 5V 7 JP 17 JP 18 5V 8 JP 15 l JP 16 5V ALL UNIPOLAR JUMPER DIGITAL JUMPER CHANNELS BIPOLAR POSITION FILTERING POSITION JUMPERS UNP or BIP JUMPER FIL none 1 8 JP2 JP5 UNP JP6 FIL Figure 17 Factory Configuration Jumper Settings For each input channel operating in voltage mode set the corresponding Voltage Range Jumper to 5V for 0 to 5 to 5 volt input range or 10V for 0 to 10 to 10 volt input range 2 3 3 Selecting Unipolar or Bipolar Input Mode Locate the Unipolar Bipolar Jumpers JP2 and JP5 see Figure 18 Set both jumpers to UNP for unipolar operation or BIP for bipolar operation Note that the Unipolar Bipolar Jumper settings affect all 8 input channels 16 CTI 2550 Installation and Operation Guide a een ge anne n nana nanan ns e n e MCLTABE CURRENT JLIIAPERS WO Tar RANGE JURIPTRS Ol TAL FILTERING UN POLAR AURIPCR 5 BIPCL 4R JURIPER i1 OF 25 UNIPOLAR BIPOLAR y I JUMPER VOTE DRAWING NOT 73 SEALE ii OF 2 Figure 18 Configuration Jumper Locations 2 3 4 Selecting Digital Filtering Locate the Digital Filtering No Filtering Jumper JP6 see Figure 18 To enable digital filtering set the jumper in the FIL position Since many analog input signals contain noise CTI recommends using digital filteri
8. SIGN 1 DIGITAL WORD SET TO O IF OVERRANGE 0 4 SET TO 1 UNIPOLAR WORD MAP Figure 6 Minimum Non Underrange Word Value Unipolar unipolar mode 4 CTI 2550 Installation and Operation Guide 1 6 2 Bipolar Mode Conversion The following equations may be used to calculate the digital word which will result from a particular voltage or current input in the Bipolar Input Mode 5 to 5V Input Range Mode Digital Word WX Input voltage V x 32000 5 volts Note Maximum digital word WX is 32 753 for voltages gt 5 11V Minimum digital word WX is 32 767 for voltages lt 5 12V 10 to 10V Input Range Mode Digital Word WX Input voltage V x 32000 10 volts Note Maximum digital word WX is 32 753 for voltages gt 10 23V Minimum digital word WX is 32 767 for voltages lt 10 24V 20 to 20 mA Input Range Mode Digital Word WX Input current mA x 32000 20 mA Note Maximum digital word WX is 32 753 for current gt 20 46mA Minimum digital word WX is 32 767 for current lt 20 47mA The following figures show the bit conditions for the maximum and minimum non overrange values in Typical Digital Word Map for Maximum Digital Word 16 384 64 32 16 BIT 0 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 MSB TRANSLATED UNUSED LSB SIGN 1 DIGITAL WORD SET TO O IF OVERRANGE 0 SET TO 1 BIPOLAR WORD MAP Figure 7 Maximum Non Overrange Word Value
9. earth ground for the cable shield at the signal source Avoid placing wires on any vibrating surface 2 2 Unpacking the Module Open the shipping carton and remove the special anti static bag which contains the module CAUTION HANDLING STATIC SENSITIVE DEVICES The components on the Model 2550 module printed circuit card can be damaged by static electricity discharge To prevent this damage the module is shipped in a special anti static bag Static control precautions should be followed when removing the module from the bag when opening the module and when handling the printed circuit card during configuration After discharging any static build up remove the module from the static bag Do not discard the static bag Always use this bag for protection against static damage when the module is not inserted into the I O backplane 14 CTI 2550 Installation and Operation Guide 2 3 Configuring the Module The Model 2550 must be configured for voltage or current inputs voltage range unipolar bipolar mode and digital filtering no filtering mode before wiring the input connectors and inserting the module into the I O base As shipped all input channels are configured for current inputs 5V range see Note below unipolar mode and digital filtering enabled see Figure 17 NOTE The 5V input signal range configuration is used for both O to 5 VDC and 1 to 5 VDC or 4 to 20 mA and 0 to 20 mA input signal ranges Changing the modul
10. the lower limits in 0 to 5V Input Mode or 0 to 10V Input Mode are translated into a digital word equivalent to 1 See Figure 13 Note that although the digital word may approach Zero as the analog input signal approaches the minimum for a given range the digital word will never actually be 0 See Figure 6 Thus in the 0 to 5V Input Mode input signals below the 0 00125V minimum result in a translated digital word of 1 all 1 s Similarly in the 0 to 10V Input Mode input VOLTAGE 0 TO 5V 100V 0 00125V 5 1175V 100V RANGE 0 TO 10V 100V 0 00250V 10 2350V 100V p Ps Module not Underrange Accuracy Overrange Module not protected output data within bit set protected damage specification damage might occur might occur 0 32 761 UNIPOLAR MODE Figure 10 Voltage Input Limits Unipolar signals below the 0 00250V minimum are translated into a digital word equivalent to 1 all 1 s In Bipolar Mode when the analog input signal is outside the normal operating range the translated digital word will exceed 32000 to a maximum of 32753 for positive going signals or 32767 for negative going signals The following figure shows the effects of excessive voltage on the module See VOLTAGE 5 TO 45V 100V 5 1175V ov 5 1175 100V RANGE _ 40 TO 10V 100V 10 2350V OV 410 2350V 100V q gt Module not Underrange Accuracy Overrange Module not protected output data within bit set protected damage specificat
11. Bipolar 2c 5 Figure 8 Minimum Non Underrange Word Value Bipolar 2e eee 6 Figure 9 Example of Change in Input Level 0 0 cette ene 6 Figure 10 Voltage Input Limits Unipolar csse I 7 Figure 11 Voltage Input Limits Bipolar csse n 7 Figure 12 Overrange Word Value Unipolar csse 8 Figure 13 Underrange Word Value Unipolar ccce 8 Figure 14 Overrange Word Value Bipolar isses 8 Figure 15 Underrange Word Value Bipolar 2e 9 Figure I6 7npu t Resolution stes or VRAD PORT A PIR ie OER PRR IRE ERIS 10 Figure 17 Factory Configuration Jumper Settings cesses 14 Figure 18 Configuration Jumper Locations ssec 15 Figure 19 Screw Terminal Plug Wiring 0 0 60 eee eens 16 Figure 20 Input Connector Wiring csse e 17 Figure 21 Example I O Configuration Chart csse 18 Figure 22 Troubleshooting Matrix 0 00 0 6c e net e eens 19 Figure 23 Jumper Settings Log I I 23 CTI2550 Installation and Operation Guide xi xii CTI 2550 Installation and Operation Guide CHAPTER 1 DESCRIPTION The Eight Channel Analog Input Module is a member of Control Technology s family of I O modules compatible with the SIMATIC 505 programmable controllers The Model 2550 is designed to translate an analog input signal into an equivalent digital word which is then sent to the programmable controller PLC 1 1 Front Panel Description ISOLATED ANAL INPUT
12. CTI 2550 EIGHT CHANNEL ISOLATED ANALOG INPUT MODULE INSTALLATION AND OPERATION GUIDE Version 2 0 CTI Part 22062 00102 245210G 092205 25 ii CTI 2550 Installation and Operation Guide Copyright 2005 Control Technology Inc All rights reserved This manual is published by Control Technology Inc 5734 Middlebrook Pike Knoxville TN 37921 This manual contains references to brand and product names which are tradenames trademarks and or registered trademarks of Control Technology Inc Siemens and SIMATIC are registered trademarks of Siemens AG Other references to brand and product names are tradenames trademarks and or registered trademarks of their respective holders DOCUMENT DISCLAIMER STATEMENT Every effort has been made to ensure the accuracy of this document however errors do occasionally occur CTI provides this document on an as is basis and assumes no responsibility for direct or consequential damages resulting from the use of this document This document is provided without express or implied warranty of any kind including but not limited to the warranties of merchantablility or fitness for a particular purpose This document and the products it references are subject to change without notice If you have a comment or discover an error please call us toll free at 1 800 537 8398 CTI2550 Installation and Operation Guide iii iv CTI 2550 Installation and Operation Guide PREFACE This Installation and Oper
13. EQUENTIAL DAMAGES SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR CONSUMER PRODUCTS SO THE ABOVE LIMITATIONS OR EXCLUSIONS MAY NOT APPLY TO YOU THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH MAY VARY FROM STATE TO STATE CTI 2550 Installation and Operation Guide 31 32 CTI 2550 Installation and Operation Guide REPAIR POLICY In the event that the Product should fail during or after the warranty period a Return Material Authorization number RMA can be requested verbally or in writing from CTI main offices Whether this equipment is in or out of warranty a Purchase Order number provided to CTI when requesting the RMA number will aid in expediting the repair process The RMA number that 1s issued and your Purchase Order number should be referenced on the returning equipment s shipping documentation Additionally if under warranty proof of purchase date and serial number must accompany the returned equipment The current repair and or exchange rates can be obtained by contacting CTI s main office at 1 800 537 8398 When returning any module to CTI follow proper static control precautions Keep the module away from polyethylene products polystyrene products and all other static producing materials Packing the module in its original conductive bag is the preferred way to control static problems during shipment Failure to observe static control pre
14. ET TO 1 BIPOLAR WORD MAP Figure 4 Word Input to the PLC from the Module Bipolar 1 6 Analog to Digital Conversion 1 6 1 Unipolar Mode Conversion The following equations may be used to calculate the digital word which will result from a particular voltage or current input in the Unipolar Input Mode CTI 2550 Installation and Operation Guide 0 to 5V Input Range Mode Digital Word WX Input voltage V x 32000 5 volts Note Maximum digital word WX is 432 761 for voltages gt 5 11V 0 to 10V Input Range Mode Digital Word WX Input voltage V x 32000 10 volts Note Maximum digital word WX is 32 761 for voltages gt 10 23V 0 to 20 mA Input Range Mode Digital Word WX Input current mA x 32000 20 mA Note Maximum digital word WX is 432 761 for current gt 20 47mA The following figures show the bit conditions for the maximum and minimum non overrange values in Typical Digital Word Map for Maximum Digital Word 16 384 64 32 16 8 BIT 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 dee 4 MSB TRANSLATED UNUSED LSB SIGN 1 DIGITAL WORD SET TO 0 IF OVERRANGE 0 4 SET TO 1 UNIPOLAR WORD MAP Figure 5 Maximum Non Overrange Word Value Unipolar Typical Digital Word Map for Minimum Digital Word 16 384 64 32 16 BIT 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 de 3 MSB TRANSLATED UNUSED LSB
15. P9 JP 10 5V 4 JP 7 JP 8 5V 5 JP 21 JP 22 5V 6 JP 19 JP 20 5V 7 JP 17 JP 18 5V 8 JP 15 JP 16 5V ALL UNIPOLAR JUMPER DIGITAL JUMPER CHANNELS BIPOLAR POSITION FILTERING POSITION JUMPERS UNP or BIP JUMPER FIL none 1 8 JP2 JP5 UNP JP 6 FIL Figure 23 Jumper Settings Log CTI 2550 Installation and Operation Guide 27 28 CTI 2550 Installation and Operation Guide CTI2550 Installation and Operation Guide USER NOTES 30 CTI 2550 Installation and Operation Guide LIMITED PRODUCT WARRANTY CTI warrants that this CTI Industrial Product shall be free from defects in material and workmanship for a period of one 1 year after purchase from CTI or from an authorized CTI Industrial Distributor This CTI Industrial Product will be newly manufactured from new and or serviceable used parts which are equal to new in the Product Should this CTI Industrial Product fail to be free from defects in material and workmanship at any time during this one 1 year warranty period CTI will repair or replace at its option parts or Products found to be defective and shipped prepaid by the customer to a designated CTI service location along with proof of purchase date and associated serial number Repair parts and replacement Product furnished under this warranty will be on an exchange basis and will be either reconditioned or new All exchanged parts or Products become the property of CTI Should any Product or part r
16. Panel Description 0 0 0 0 0 ce ene eens 1 LAI Active CEDO su tenet Wid de A aad he at SIRO E e D OUR RA Lg RA 1 1 1 2 Input Connector for Channels 1 4 0 0 0 0 0 cece ee ee eee 2 1 1 3 Input Connector for Channels 5 8 2 0 0 eas 2 1 2 Asynchronous Operation 00 e E ene en ene eens 2 1 3 Unipolar or Bipolar Mode 0 0 ce ene tenn eens 2 1 4 Voltage or Current Mode 0 0 occ a 2 1 5 Digital Word Map sas ea au er baie SUPRA PA eR PAAR AR AC 2 1 6 Analog to Digital Conversion 0 0 0 0 0 0 ccc cee ene ene 3 1 6 1 Unipolar Mode Conversion 0 0 0 0 aasan eens 3 1 6 2 Bipolar Mode Conversion 0 0 cece cc eee eh 5 1 6 3 Example Conversion asas es RU M ae SUR UE De ee oa a oe 6 1 7 Effect of Out of Range Input Signals 0 2 tenes 7 1 8 Using the Module with 20 Offset 2 0 0 0 teens 9 1 9 Resolution Tarn nne a pO eee eed PHO R eh eae A E NAA 9 CHAPTER 22 INSTALLATION qua siso du CE EE PORES SES OOS OER PROS d eR 11 2 1 Planning the Installation 0 0 2 ce RI 11 2 1 1 Calculating the I O Base Power Budget 20 000 eee 11 2 1 2 Input Signal Wiring sseeeeeeeeeee es 11 2 2 Unpaclang the Module e rsss se sein VOOR ACE ER RN ae ens 12 2 3 Configuring the Module 6 2 eee tenes 13 2 3 1 Selecting Voltage or Current Input Mode 20 00005 13 2 3 2 Selecting Voltage Range eect e 14 2 3 3 Selecting Unipolar or Bipolar
17. ation Guide provides installation and operation instructions for the CTI 2550 Eight Channel Isolated Analog Input Module for SIMATIC 505 programmable controllers We assume you are familiar with the operation of the SIMATIC amp 505 programmable controllers Refer to the appropriate SIMATIC user documentation for specific information on the SIMATIC 505 programmable controllers and I O modules This Installation and Operation Guide is organized as follows Chapter 1 provides a description of the module Chapter 2 covers installation and wiring Chapter 3 is a guide to troubleshooting ISOLATED Figure 1 The Model 2550 8 Channel Isolated Analog Input Module CTI 2550 Installation and Operation Guide vi CTI 2550 Installation and Operation Guide USAGE CONVENTIONS NOTE Notes alert the user to special features or procedures CAUTION Cautions alert the user to procedures which could damage equipment WARNING Warnings alert the user to procedures which could damage equipment and endanger the user CTI2550 Installation and Operation Guide vii viii CTI 2550 Installation and Operation Guide TABLE OF CONTENTS PREFACE ig alo gg sha dag said ed Raid edhe ad er b an Poe od eod On ted ee ad P e A i o clou qu v USAGE CONVENTIONS euep usto ssns aiam aute quie sutaani ania sa a Ta Si Sa Bute trs vii TABLE ORFIGURES iaaiiai A VR e e e eaa Deer xi CHAPTER T DESCRIPTION 5 45 p ct mace SS E E a E age 1 1 1 Front
18. cautions may void the warranty For additional information on static control precautions contact CTI s main office at 1 800 537 8398 CTI2550 Installation and Operation Guide 33
19. dget and routing the input signal wiring to minimize noise The following sections discuss these important considerations 2 1 1 Calculating the I O Base Power Budget The Model 2550 requires 2 5 watts of 5 V power from the I O base Use this value to verify that the base power supply capacity is not exceeded 2 1 2 Input Signal Wiring Input signal wiring must be shielded twisted pair cable The shielding for the cable should always be terminated at the Model 2550 Each isolated input channels contains its own local ground for the shield wire The input isolation amplifier is designed in this manner by the manufacturer Standard practices usually require that all shields be tied together and grounded at a single point In an isolated system this will actually impede the system to reject noise The correct method for terminating the shields on an isolated channel is to connect them to the channel s local ground Gn n 1 to 8 depending on the channel number This will provide the best performance There should never be any shield termination at the source end of the signal wire CTI 2550 Installation and Operation Guide 13 Note the following general considerations when wiring the module Always use the shortest possible cables Avoid placing low voltage wire parallel to high energy wire 1f the two wires must meet cross them at a right angle Avoid bending the wire into sharp angles Use wireways for wire routing Be sure to provide a proper
20. e input channel configuration involves the following steps 1 Selecting voltage V or current I input mode for each channel 2 Selecting 0 to 5V or 0 to 10V voltage range for each channel 3 Selecting unipolar or bipolar input mode for the module 4 Selecting digital filtering or no filtering for the module 5 Logging the configuration jumper settings for future reference Each of these steps 1s described in the following sections 2 3 1 Selecting Voltage or Current Input Mode Locate the 8 Voltage Current Jumpers corresponding to input channels 1 through 8 See Figure 18 for the location of these jumpers For each input channel select current mode by placing the jumper in the position or voltage mode by placing the jumper in the V position For each input channel set to current mode you must set the corresponding Voltage Range Jumper to the 5V position as described in the following section CTI 2550 Installation and Operation Guide 15 2 3 2 Selecting Voltage Range Locate the Voltage Range Jumpers corresponding to input channels 1 through 8 see Figure 18 For each input channel operating in current mode set the corresponding Voltage Range Jumper to 5V CAUTION For each input channel configured for current mode the corresponding Voltage Range Jumper must be set to 5V or damage will result to the module CHANNEL VOLTAGE JUMPER VOLTAGE JUMPER NUMBER CURRENT
21. ead I O configuration Incorrect jumper settings Refer to Section 2 4 of this Installation amp Operation guide for jumper settings Incorrectly calibrated Return the module to CTI for recalibration Noisy signal Check for proper shield termination at input connectors Figure 22 Troubleshooting Matrix determine the appropriate corrective action When it is inconvenient to visually check the status indicator use the VPU or TISoft Display Failed I O or Show PLC Diagnostics support functions Note that 1f the module power supply user CAUTION The module fuse is not user serviceable If this fuse is blown the module has a serious component failure and should be returned to CTI for repair supply fails the module will still be logged into the PLC even though it 1s not operating In this case Display Failed I O will not provide the information to accurately diagnose the problem If after consulting the chart above you are unable to diagnose or solve the problem contact your local distributor or CTI at 1 800 537 8398 for further assistance CTI 2550 Installation and Operation Guide 23 24 CTI 2550 Installation and Operation Guide Input Channels Signal Range Update Time Digital Filtering Time Constant DC Input Resistance Repeatability Accuracy Resolution Common Mode Rejection Normal Mode Rejection Input Protection Isolation Module Size SPECIFICATIONS 8 isolat
22. ed input channels Unipolar 0 to 5 VDC 0 to 10 VDC or 0 to 20 mA Bipolar 5 to 5 VDC 10 to 10 VDC or 20 to 20 mA 1 mSec no filtering 2 mSec digital filtering enabled 0 3 Sec Voltage Mode 1MQ Current Mode 2500 0 05 Voltage Mode 0 1 of full scale from 0 to 60C Current Mode 0 2 of full scale from 0 to 60C Unipolar 12 bit plus sign 0 5 VDC range 1 25 mV step 0 10 VDC range 2 5 mV step Bipolar 11 bit plus sign 5 to 5 VDC 2 5 mV step 10 to 10 VDC range 5 mV step gt 110db 60Hz digital filtering disabled gt 45db 60Hz digital filtering enabled Input ESD Protection 20 000 V Overrange Protection 100 V 1500 VDC channel to channel 1500 VDC channel to PLC Single wide Backplane Power Consumption 2 5 Watts Operating Temperature Storage Temperature Humidity Relative Shipping Weight Specifications subject to change without notice CTI2550 Installation and Operation Guide 0 to 60 C 32 to 140 F 40 to 85 C 40 to 185 F 5 to 95 non condensing 1 5 lbs 0 68 Kg 25 26 CTI 2550 Installation and Operation Guide Record the configuration jumper settings on this log for future reference Make additional copies if necessary JUMPER SETTINGS LOG SHEET CHANNEL VOLTAGE JUMPER VOLTAGE JUMPER NUMBER CURRENT POSITION RANGE POSITION JUMPER Vorl JUMPER 5V or 10V 1 JP 13 JP 14 5V 2 JP 11 JP 12 5V 3 J
23. eturned to CTI hereunder be found by CTI to be without defect CTI will return such Product or part to the customer This warranty does not include repair of damage to a part or the Product resulting from failure to provide a suitable environment as specified in applicable Product specifications or damage caused by an accident disaster acts of God neglect abuse misuse transportation alterations attachments accessories supplies non CTI parts non CTI repairs or activities or to any damage whose proximate cause was utilities or utility like services or faulty installation or maintenance done by someone other than CTI Control Technology Inc reserves the right to make changes to the Product in order to improve reliability function or design in the pursuit of providing the best possible Product CTI assumes no responsibility for indirect or consequential damages resulting from the use or application of this equipment THE WARRANTY SET FORTH ABOVE IN THIS ARTICLE IS THE ONLY WARRANTY CTI GRANTS AND IT IS IN LIEU OF ANY OTHER IMPLIED OR EXPRESSED GUARANTY OR WARRANTY ON CTI PRODUCTS INCLUDING WITHOUT LIMITATION ANY WARRANTY OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE AND IS IN LIEU OF ALL OBLIGATIONS OR LIABILITY OF CTI FOR DAMAGES IN CONNECTION WITH LOSS DELIVERY USE OR PERFORMANCE OF CTI PRODUCTS OR INTERRUPTION OF BUSINESS LOSS OF USE REVENUE OR PROFIT IN NO EVENT WILL CTI BE LIABLE FOR SPECIAL INCIDENTAL OR CONS
24. ion of voltage or current mode and voltage range are made via internal jumpers see Sections 2 3 1 and 2 3 2 1 5 Digital Word Map A unipolar analog input signal is translated into a 12 bit plus sign bit digital word A bipolar input signal is translated into an 11 bit digital word plus 1 bit for the polarity sign Since the PLC requires a 16 bit input word the 12 bit value from the converter is placed into a 16 bit word for transmittal to the PLC As shown in the following figure of the four bits not used for the digital word one is used to show the sign of the word one is used to note values which are overrange and the remaining bits are not used and are set to zero 2 CTI 2550 Installation and Operation Guide 32 16 8 4 2 1 BIT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 MSB TRANSLATED UNUSED LSB SIGN 1 DIGITAL WORD SET TO 0 IF OVERRANGE 0 4 SET TO 1 UNIPOLAR WORD MAP Figure 3 Word Input to the PLC from the Module Unipolar As shown in the following figure of the four bits not used for the digital word one 1s used to show the sign of the word one is used to note values which are overrange and the remaining bits are not used and are set to zero i 32 16 8 4 2 1 BIT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 MSB TRANSLATED UNUSED LSB SIGN 1 DIGITAL WORD SET TO 0 IF OVERRANGE 0 4 S
25. ion damage might occur might occur 32 767 32 761 BIPOLAR MODE Figure 11 Voltage Input Limits Bipolar Figures 7 and 8 for maximum and minimum bipolar word values See Figures 14 and 15 for overrange and underrange bipolar word values CTI 2550 Installation and Operation Guide 7 Typical Digital Word Map for Overrange Digital Word 16 384 64 32 16 8 BIT 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 MEUM MSB TRANSLATED UNUSED LSB SIGN 1 DIGITAL WORD SET TO 0 IF OVERRANGE 0 SET TO 1 UNIPOLAR MODE Figure 12 Overrange Word Value Unipolar Typical Digital Word Map for Underrange Digital Word 16 384 64 32 16 BIT 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 d MSB TRANSLATED UNUSED LSB SIGN 1 DIGITAL WORD SET TO 0 IF OVERRANGE 0 4 SET TO 1 UNIPOLAR MODE Figure 13 Underrange Word Value Unipolar Figures 12 and 13 show the binary values of overrange and underrange conditions for Unipolar mode Typical Digital Word Map for Overrange Digital Word 16 384 64 32 16 BIT 0 1 1 1 1 1 1 1 1 1 1 1 0 0 0 1 MSB TRANSLATED UNUSED LSB SIGN 1 DIGITAL WORD SET TO O IF OVERRANGE 0 SET TO 1 BIPOLAR MODE Figure 14 Overrange Word Value Bipolar Figures 14 and 15 show the binary values of overrange and underrange cond
26. is 1 part out of 2000 This relationship can be shown as 16 counts per step 32000 counts full scale 1 2000 When using the module with 2096 offset module resolution remains at 8 counts out of 32000 but offset resolution becomes 10 counts out of 32000 as a result of the multiplication and division of the incoming data word 10 CTI 2550 Installation and Operation Guide The chart below shows the corresponding input resolution per step for each of the input configuration UNIPOLAR 4 UNIPOLAR WITH T L d 20 OFFSET UNIPOLAR 4 modes RANGE DIGITAL INPUT RESOLUTION CONFIGURATION COUNTS STEP PER STEP 0 5 VDC 8 1 25 mV 0 10 VDC 8 2 5 mV 0 20 mA 8 25 pA 1 5VDC 10 1 25 mV 4 20 mA 10 25 pA 5 TO 45V 16 2 5 mV 10 TO 10 V 16 5mV 0 20 mA 16 5 pA Figure 16 nput Resolution CTI2550 Installation and Operation Guide 11 12 CTI 2550 Installation and Operation Guide CHAPTER 2 INSTALLATION The installation of the Eight Channel Analog Input Module involves the following steps 1 Planning the installation 2 Configuring the module 3 Inserting the module into the I O base 4 Wiring and connecting the module input connectors 5 Checking module operation The steps listed above are explained in detail in the following pages 2 1 Planning the Installation Planning is the first step in the installation of the module This involves calculating the I O base power bu
27. itions for Bipolar mode 8 CTI 2550 Installation and Operation Guide CTI2550 Installation and Operation Guide Typical Digital Word Map for Underrange Digital Word 16 384 64 32 16 BIT 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 MSB TRANSLATED UNUSED LSB SIGN 1 DIGITAL WORD SET TOO IF OVERRANGE 0 SET TO 1 BIPOLAR MODE Figure 15 Underrange Word Value Bipolar 1 8 Using the Module with 20 Offset Some applications use transducers that provide 1 to 5 volt 4 to 20 mA input signals instead of 0 to 5 volt 0 to 20 mA input signals You can allow for this 20 offset by including some additional instructions in your RLL Relay Ladder Logic program First subtract 6400 from the input data word WX Then multiply the result by 125 and divide the product by 100 This yields the following equation WX 6400 x 125 100 20 offset data word Consult your PLC programming manual or program design guide for information about the RLL instructions used in the conversion 1 9 Resolution In the Unipolar Input Mode the module has a resolution of 8 counts out of 32000 That is the smallest unit into which the module will divide an input is 1 part out of 4000 This relationship can be shown as 8 counts per step 32000 counts full scale 1 4000 In Bipolar Mode the resolution is 16 counts out of 32000 so that the smallest unit into which the module will divide an input
28. ng unless maximum response time is required CTI 2550 Installation and Operation Guide 17 2 4 Inserting the Module Into the I O Base WARNING The module must not be inserted into the I O rack while power is applied Insert the module into the I O base by carefully pushing the module into the slot When the module is fully seated in the slot and backplane connector tighten the captive screws at the top and bottom to hold the module in place To remove the module from the I O base loosen the captive screws then remove the module from the I O base Be careful not to damage the edge card at the back of the module when inserting or removing the module 2 5 Wiring the Input Connectors Input signals are accepted through a connector assembly located on the front of the module The connector assembly consists of a header attached to the printed circuit card and a mating removable screw terminal plug see Figure 19 Wiring is connected through the screw terminal plug The screw terminals can accept wire sizes up to single stranded 12 gauge wire The actual size wire used depends on the external device providing the input signal Consult the device manufacturer s recommendations for selecting the input wire size To assign an input to a specific channel locate the appropriate channel position on the screw terminal plug as shown in the following figure 18 CTI 2550 Installation and Operation Guide SVRLSSSgg
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