SLC 500™ ISOLATED - Spectrum Controls, Inc.
Contents
1. Bit 15 Bit 0 Address Channel 0 Configuration Word Word0 0 Channel 1 Configuration Word Wordi O e 1 Channel 2 Configuration Word Word2 O e 2 Channel 3 Configuration Word Word3 O e 3 Pie ae Low Limit of User Defined Scale A Word4 O e 4 High Limit of User Defined Scale A Word5 Ore 5 Low Limit of User Defined Scale B Word6 Ore 6 Output Image High Limit of User Defined ScaleB Word7 7 8 Words 2 Channel 0 Data Word Word0 0 Channel 1 Data Word Wordi 1 Class 1 Channel 2 Data Word Word2 I e 2 Channel 3 Data Word Word3 1 e 3 Channel 0 Status Word Word 4 44 Channel 1 Status Word Word5 1e5 Channel 2 Status Word Word6 1e 6 Channel 3 Status Word Word7 7 Bit 15 Bit 0 Address Example If you want to reconfigure channel 2 on your input module and it is in slot 4 of the SLC chassis you would modify the configuration word at address O 4 2 Alternatively if you want to obtain the status of channel 2 you would check the status word at address I 4 6 The output and input image are described below Output Image Configuration amp User Defined Scale Limits The 8 word output image defined as the output from the SLC processor to your module defines how each channel on your module works The configuration words replace configuration DIP switches on your module Each word configures a single channel The user defined scale limits define how your module2. Rung 2 0 First Pass Bit Initialize Module s l COP COPY FILE 15 Source N10 0 Dest 0 3 0 Length 6 Rung 2 1 IEND Figure 16 Data table for user defined scaling example address Tts data 0 address 15 data 0 N10 0 0000 0000 0100 1011 N10 3 0000 0000 0000 0000 N10 1 0000 0000 0000 0000 N10 4 0000 0000 0110 0100 100 gallons N10 2 0000 0000 0000 0000 N10 5 0010 0111 0000 1111 9999 gallons In this example the operator interface is programmed to 163460 0 channel 0 data word 42 SLC 500 Isolated Analog Input Modules Chapter 6 Inspecting Your Module Testing Your Module Read this chapter to prevent potential problems in a systematic and controlled way This chapter covers inspecting your module e disconnecting prime movers powering up interpreting the LED indicators interpreting I O error codes troubleshooting Before testing your module test your SLC 500 system using the procedures described in your system s Installation amp Operation Manual You can prevent many potential problems by simply inspecting your analog module 1 Ensure that all wire connections are correct and secure and that no wires are missing or broken CAUTION FIELD WIRING ERRORS Before enabling a channel through your ladder program ensure that you have not connected a voltage source to a channel configured for a current input and vice versa Failure to
3. Owner s Guide 0300127 04 Rev F SLC 500 ISOLATED ANALOG INPUT MODULES Catalog Numbers 1746sc INI4i 1746sc INI4vi r 4 J J Nes P SEN ee 4 EAD OR V d A EKO 9 SZ SPECTRUM C O N T R O L S Important Notes 1 Read all the information in this guide before installing the product 2 The information in this owner s guide applies to hardware and software version 1 0 or later 3 This guide assumes that the reader has a full working knowledge of the relevant processor Notice The products and services described in this owner s guide are useful in a wide variety of applications Therefore the user and others responsible for applying the products and services described herein are responsible for determining their acceptability for each application While efforts have been made to provide accurate information within this owner s guide Spectrum Controls assumes no responsibility for the accuracy completeness or usefulness of the information herein Under no circumstances will Spectrum Controls be responsible or liable for any damages or losses including indirect or consequential damages or losses arising out of either the use of any information within this owner s guide or the use of any product or service referenced herein No patent liability is assumed by Spectrum Controls with respect to the use of any of the information products circuits pr
4. T Terminal block 10 removing 13 Terminal connections 17 Terms 4 Thermal dissipation 8 Troubleshooting 46 U UL 10 Under range error 37 Unused slots 14 Update time 4 6 9 21 Useful resolution 6 7 22 User defined scales 5 20 29 30 31 33 41 W Waranty ii Wire routing 14 Wire Size 10 Wiring 14 Getting Technical Assistance Declaration of Conformity If you need technical assistance please review the information in Chapter 6 Testing Your Module before calling your local distributor of Spectrum Controls Note that your module contains electronic components which are susceptible to damage from electrostatic discharge ESD An electrostatic charge can accumulate on the surface of ordinary plastic wrapping or cushioning material In the unlikely event that the module should need to be returned to Spectrum Controls please ensure that the unit is enclosed in approved ESD packaging such as static shielding metallized bag or black conductive container Spectrum Controls reserves the right to void the warranty on any unit that is improperly packaged for shipment For further information or assistance please contact your local distributor or call Spectrum Controls Customer Satisfaction department at 425 746 9481 from 8 00 A M to 5 00 P M Pacific Time Available upon request NGMPASS e LOB AMU TheEN COM PASS logo and SLC 500 are trademarks of Allen Bradley Company Inc Copyrig
5. Image table 19 Impedance 9 Input image table 20 Input ranges 29 30 52 SLC 500 Isolated Analog Input Modules Inspection 43 Installation 13 14 Isolation 7 8 J Jumper 11 L Ladder programming 19 examples 39 LEDs 7 10 45 Limits 20 LSB 6 Maintenance 47 Manuals related 4 Memory map 20 Module ID code 6 8 27 Noise 7 13 14 22 Non fatal channel error 37 Normal mode rejection 6 8 0 Open circuit response 7 29 32 Operating ranges 9 Operating temperature 10 Opto electical isolation 8 Output image table 20 Over current protection 7 9 Over range error 37 Over voltage protection 7 9 P PID control 29 30 31 39 Power requirements 8 12 Powering up 44 Precision 9 Preventive maintenance 47 Programming 19 21 equipment 27 examples 39 Proportional counts 29 30 31 Rack 6 choosing slot 13 inserting module 13 14 power requirements 12 Range error 37 Range full scale 6 Relative humidity 10 Removable terminal block 10 Repackaging iii 12 Repeatibility 6 Resolution 5 6 7 9 22 Response time 21 S Safety 47 Sampling time 6 Scale limits 20 Scaled for PID 29 30 31 Scaling 5 29 30 31 33 41 Schematics 18 Service 50 Shipping iii 12 Signal attenuation 4 23 Single ended operation 18 Slot disabling 26 inserting module into 13 14 selecting 13 Specifications 8 Static shielded container 12 Status 6 Status bits 7 20 35 Step response time 6 9 21 Storage temperature 10
6. Invalid O O O O 60 Hz input filter 50 Hz input filter 150 Hz input filter 500 Hz input filter O O O O Auto calibration disabled 0 Auto calibration enabled 1 Unused 0 0 0 0 Invalid 1 1 1 1 6 Applies only to the 1 5 Vdc and 4 20 mA input ranges 30 SLC 500 Isolated Analog Input Modules Input Channel Enable configuration bit 0 Use this bit to enable or disable a channel To minimize update times disable any unused channels When you set the channel enable bit to one the module reads the configuration word Before accepting any new data as valid verify that the status word described in the last subsection of this chapter reflects the changes you made While the channel enable bit is set to zero the channel data word and status word are also set to zero When you reset the channel enable bit to one the channel data word remains set to zero until your module updates the channel status word Input Range configuration bits 1 3 Use this bit field to configure the channel for the type of input device you want to connect to your module Data Format configuration bits 4 6 Use this bit field to select one of the following formats engineering units mV or nA e scaled for PID works with the SLC PID instruction proportional counts two s complement binary e 1746 NI4 compatible format the format used by the 1746 NI4 user defined scale A e user defined sca
7. Defined Scale Limits for information on the User Defined Scale data format Note Modules marked Series B Revision 1 00 or earlier had different signal limits for the Scaled for PID data format see the Owner s Guide that came with your module 32 SLC 500 Isolated Analog Input Modules Open Input Circuit Response configuration bits 7 and 8 For 1 5 Vdc and 4 20 mA inputs only use this bit field to define the state of the channel data word when your module detects an open circuit for that channel If you select zero on open input circuit your module sets the channel data word to zero during an open circuit condition e If you select max on open input circuit your module sets the channel data word to its full scale value during an open circuit e If you select min on open input circuit your module sets the channel data word to its low scale value during an open circuit The full scale and low scale values max and min count limits are determined by the channel s data format and selected input range See Table 14 Important If a circuit opens your module provides input signal values until it detects and flags the open circuit Input Filter Frequency configuration bits 9 and 10 Use this bit field to select one of four filters for a channel The filter selected affects the channel update time and noise rejection characteristics e A lower filter frequency increases the noise rejection and effective
8. Differential operation The difference in voltage between a channel s positive and negative terminals Effective resolution The number of bits in the channel data word that do not vary due to noise Filter frequency The user selectable first notch frequency for the A D converter s digital filter The digital filter provides high noise rejection at the selected frequency Full scale error gain error The difference in slope between the actual and ideal analog transfer functions SLC 500 Isolated Analog Input Modules Full scale range FSR The difference between the maximum and minimum specified analog values Gain drift The change in full scale transition voltage measured over the operating temperature range of the module LSB least significant bit The bit that represents the smallest value within a string of bits The weight of this value is defined as the full scale range divided by the resolution Maximum differential voltage The largest voltage difference allowed between the negative terminal and positive terminal during normal differential operation Module ID code A unique number associated with each 1746 I O module The code defines for the processor the type of I O or specialty module residing in a specific slot in the 1746 chassis Module update time See channel update time Normal mode rejection differential mode rejection A logarithmic measure in dB of a devi
9. Source N11 23 Rate 10000 Offset Dest Rung 2 3 ENDI Figure 13 Data table for PID control example address 15 data 0 address 15 data 0 N10 0 0000 0000 0001 1011 Important When using your module s Scaled For PID data format with the SLC PID function ensure that the Maximum Scaled S word7 and Minimum Scaled word 8 PID instruction parameters match your module s maximum and minimum scaled range in engineering units for that channel This allows you to accurately enter the setpoint in engineering units Chapter 5 Ladder Program Examples 41 User Defined Scaling Your input module was designed to work directly with applications requiring special data scaling without an intermediate scaling operation Example Suppose your input module is in slot 3 and you have a pressure sensor with a 4 20 mA range connected to channel 0 The following figures show you how to use the User Defined Scaling data format to send specially scaled data 100 to 9999 in this example to a simple display only operator interface Figure 14 User defined scaling example Simple display only Operator Interface Specially 1746sc INI4i scaled data CPU Analog Input e g 100 9999 Module slot 3 4 20 mA Pressure Sensor Analog Input Signal channel 0 gt Figure 15 Programming for user defined scaling example
10. any system failure that may have been due to input inaccuracy 1 Configure your module for 0 20 mA input on all 4 channels using the following configuration word values Address Binary Value Decimal Equivalent 0 0000 0000 0010 1 41 O e 1 0000 0000 0010 1001 41 O e 2 0000 0000 0010 1001 41 3 0000 0000 0010 1 41 6 slot number 50 SLC 500 Isolated Analog Input Modules Verifying Voltage Inputs INI4vi only Service 2 Let the operating temperature stabilize for 2 minutes 3 Use the precision input source to provide a 15 mA input across a channel s input terminals g O COM 4 Verify that the input data is between 15110 and 15260 counts 5 Repeat steps 3 and 4 for each remaining channel 1 Configure your module for 10 V input on all 4 channels using the following configuration word values Address Binary Value Decimal Equivalent O e 0 0000 0000 0010 0001 33 O e 1 0000 0000 0010 0001 33 02 0000 0000 0001 33 O e 3 0000 0000 0010 0001 33 6 slot number 2 Let the operating temperature stabilize for 2 minutes 3 Use the precision input source to provide a 10 Vdc input across a channel s input terminals ae HO 4 Verify that the input data is between 31805 and 32131 counts 5 Repeat steps 3 and 4 for each remaining channel If the input data is out of range call the Spectrum Controls Customer Satisfaction department 20
11. completed its onboard self test If the LED does not illuminate after several seconds your module is not functional Discontinue testing until you can get the LED to illuminate The most probable reasons for the LED not illuminating are The SLC 500 system is not receiving power from its power supply The rack slot where your module is located is defective Your module is defective Chapter 6 Testing Your Module 45 Interpreting The LED Indicators Interpreting I O Error Codes Your module has five LEDs four channel status LEDs numbered 0 3 for channels 0 3 respectively and one module status LED Figure 17 LED block INPUT Channel LO Status J Module Status LJ LJ Isolated Analog Use the following table to interpret the LEDs Table 16 LED definition If the module And the channel status LED is status LED is Then On On The channel is enabled Blinking One of the following channel errors occurred circuit open or no wiring is connected signal is near or beyond end of range channel configured incorrectly Refer to the following section Troubleshooting Off Either your module is powering up or the channel is disabled Off Off Either the power is off the module is powering up or a module fault occurred Cycle power If the condition persists call your local distributor or Spectrum Controls for assistance I O
12. error codes appear in word S 6 of the SLC processor status file The first two digits of the error code identify the slot in hexadecimal with the error The last two digits identify the I O error code in hexadecimal The error codes that apply to your module include in hexadecimal 50 5E 71 watchdog error 90 94 For a description of the error codes refer to the Allen Bradley Advanced Programming Software APS Reference Manual Allen Bradley publication 1746 6 11 46 SLC 500 Isolated Analog Input Modules Troubleshooting Figure 18 Problem resolution flowchart Check LEDs on module Module Status LED s off Module fault condition Check to see that module is seated properly in chassis Cycle power Is problemNM Yes corrected Contact you local distributor or Spectrum Controls Module Status LED on i Channel Status LED s blinking Fault condition End Check channel status word bits 12 15 Bit 15 set 1 i Channel Channel Status LED s Status LED s off on Channel is Channel is not enabled enabled and working Fatal channel error such as a software power up failure due to corrupt hardware or malfunctioning software Try resetting the processor or cycling power to your module Bi
13. over range condition for a configured channel An over range condition exists when the input value is very near or above the upper limit for that channel s data format see Table 14 Under Range Error status bit 13 This bit is set to one whenever your module detects an under range condition for a configured channel An under range condition exists when the input value is very near or below the lower limit for that channel s data format see Table 14 Non Fatal Channel Error status bit 14 This bit is set to one whenever your module detects a recoverable channel error such as an invalid configuration word for that channel This bit is reset to zero when the error is resolved Fatal Channel Error status bit 15 This bit is set to one whenever your module detects a non recoverable channel error such as a software power up failure due to corrupt hardware or malfunctioning software You may be able to recover from this type of error by resetting the SLC 500 processor or cycling power to your module 38 SLC 500 Isolated Analog Input Modules Chapter 5 PID Control Programming Examples Read this chapter to familiarize yourself with how to use the advanced features of your module for e PID control e user defined scaling For information on how to use the Allen Bradley Advanced Programming Software APS to create ladder programs see the Getting Started Guide For APS Your input module was designed to work
14. 0 Low Value of User Defined Scale A High Value of User Defined Scale A Low Value of User Defined Scale B High Value of User Defined Scale B Important After setting user defined scale limits you must toggle the channel enable bit configuration bit 0 in order for your module to use the new limits Output word 4 or 6 defines the low limit of the user defined scale down to 32768 while output word 5 or 7 defines the high limit of the user defined scale up to 32767 The high limit value must be greater than the low limit value for proper operation You select the data format for each channel using that channel s configuration word described in the previous subsection Configuring Each Input Channel 34 SLC 500 Isolated Analog Input Modules The following equations show you how to convert user defined scale units or any type of units to engineering units and vice versa S U U_ x AS AU iow low D S S x AU AS U where S signal value in engineering units such as psi Siow low limit of signal value a high limit of signal value AS Sign 0 D data value user defined scale low limit of user defined scale low nich high limit of user defined scale igh AU U high U ow Example Suppose you have a sensor with a 4 20 mA range and you want to scale your data from 100 to 9999 counts For a 4 20 mA input with user defined sca
15. 0 3000 Hz M Signal Frequency Your module requires some time to auto calibrate a channel During this time your module cannot sample and convert input signals Table 10 shows the time required for auto calibration When enabled auto calibration occurs every 10 seconds for each channel independently Table 10 Auto calibration time per channel based on filter frequency Filter Frequency 50 Hz 60 Hz 250 Hz 500 Hz Current Input 182 ms 152 ms 39 ms 19 6 ms Voltage Input INI4vi only 508 430 108 56 Your module requires some time to enable or disable a channel During this time your module cannot sample and convert input signals Table 11 shows the time required for enabling or disabling a channel Table 11 Channel enable and disable times Duration Channel Enable Up to 6 5 ms Enabling user defined scaling may require an additional 0 1 ms Channel Disable Up to 5 5 ms 26 SLC 500 Isolated Analog Input Modules Your Module s Response To Slot Disabling By writing to the status file in the modular SLC processor you can disable any chassis slot Refer to your SLC programming manual for the slot disable enable procedure CAUTION POSSIBLE EQUIPMENT OPERATION Always understand the implications of disabling a module before using the slot disable feature Failure to observe this precaution can cause unintended equipment operation When you disable an input module s slot the input data in
16. 6 746 9481 to make arrangements for returning your module for factory calibration Index 1746 NI4 compatibility 30 31 A Abbreviations 4 Accuracy 6 9 Addressing 19 21 Ambient temperature 13 Analog to digital conversion 4 8 APS 27 Attenuation 4 23 Autocalibration 7 8 25 29 32 49 Backplane connector 12 Backplane current consumption 8 12 Broken wire response 7 29 32 C c UL 10 Cable recommended 10 14 Calibration 7 8 11 49 CE 10 Certifications 10 Channel configuring 28 enable disable time 29 error 37 monitoring 35 status 35 Chassis ground 15 16 17 Common mode rejection 5 8 Configuration words 5 20 28 Crosstalk 7 Current consumption 8 12 Cut off frequency 5 Data files 19 Data formats 9 29 30 31 Data scaling 5 Data table 20 Data words 5 20 35 Diagnostic information 35 45 tests 7 Differential operation 5 6 16 DIP switches 20 Disable enable time 29 Drift 6 9 Effective resolution 5 7 22 Electrical noise 13 14 22 Electrostatic damage iii 12 Empty slots 14 Enable disable time 29 Enclosure 14 Engineering units 29 30 31 Error codes 45 Error flags 37 Error full scale 5 ESD iii F Fatal channel error 37 Features 7 Filter frequencies 5 8 9 22 25 29 32 Full scale error 5 range 6 step response time 21 G Gain drift 6 Gain error 5 Grounding 14 15 16 Hazardous locations 10 Hot swapping 13 Humidity 10 I O error codes 45 ID code 6 8 27
17. 8 0 The 3 dB cut off frequency is the frequency at which input signals are passed with 3 dB of attenuation Choose a filter frequency so that the frequency of your fastest changing signal is lower than that filter s 3 dB cut off frequency All frequency components above the 3 dB cut off frequency are increasingly attenuated as shown in the following figures Figure 6 Signal attenuation with 50 Hz input filter 3 dB Amplitude in dB 120 140 160 180 200 150 200 250 300 Hz Signal Frequency 24 SLC 500 Isolated Analog Input Modules Figure 7 Signal attenuation with 60 Hz input filter 3d F 20 40 60 4 80 4 Amplitude in dB 0 120 140 160 180 200 0 60 120 180 240 300 360 Hz Y Signal Frequency 15 7 Hz Figure 8 Signal attenuation with 250 Hz input filter 408 lt 20 40 60 80 AR 4 Amplitude in dB 0 120 140 160 180 200 0 250 500 750 1000 1250 1500 Hz Y Signal Frequency 65 5 Hz Chapter 3 Things To Consider Before Using Your Module 25 Auto Calibration Time Channel Enable And Disable Times Amplitude in dB 0 a 4 Figure 9 Signal attenuation with 500 Hz input filter 3d F 20 40 oy 120 140 160 180 200 0 500 1000 1500 2000 250
18. BT 1747 TSG001 SLC 500 Software Programmerss Quick Reference Guide 1747 NP002 Allen Bradley HHT Hand Held Terminal User Manual 1747 NM009 Getting Started Guide for HHT Hand Held Terminal SD499 Allen Bradley Publication Index AG 7 1 Allen Bradley Industrial Automation Glossary To obtain a copy of any of the Allen Bradley documents listed contact your local Allen Bradley office or distributor You should understand the following terms and abbreviations before using this guide For the definitions of terms not listed here refer to Allen Bradley s Industrial Automation Glossary Publication AG 7 1 A D Refers to analog to digital conversion The conversion produces a digital value whose magnitude is proportional to the instantaneous magnitude of an analog input signal Attenuation The reduction in magnitude of a signal as it passes through a system The opposite of gain Channel Refers to one of the sets of signal interfaces available on a module s terminal block Channel update time For analog inputs the time required for a channel to sample and convert signals and make the resulting data available to the processor For analog outputs the time required for the Preface 5 channel to convert the data received from the processor to analog output signals at the terminals Chassis See rack Common mode rejection The maximum level to which a common mode input voltage appears in the numerical value re
19. Controllers You should have a basic understanding of SLC 500 products You should also understand electronic process control and the ladder program instructions required to generate the electronic signals that control your application If you do not contact your local Allen Bradley representative for the proper training before using these products This guide covers the 1746sc INI4i and 1746sc INI4vi isolated analog input modules It contains the information you need to install wire use and maintain these modules It also provides diagnostic and troubleshooting help should the need arise Table 1 lists several Allen Bradley documents that may help you as you use these products 4 SLC 500 Isolated Analog Input Modules Terms amp Abbreviations You Should Know Table 1 Related Allen Bradley documentation Allen Bradley Doc No Title 1747 2 30 SLC 500 System Overview SGI 1 1 Application Considerations for Solid State Controls 111 Allen Bradley Programmable Controller Grounding and Wiring Guidelines 1747 6 2 Installation amp Operation Manual for Modular Hardware Style Programmable Controllers 1747 NI001 Installation amp Operation Manual for Fixed Hardware Style Programmable Controllers 1747 6 4 Allen Bradley Advanced Programming Software APS User Manual 1747 6 11 Allen Bradley Advanced Programming Software APS Reference Manual 1747 6 3 Getting Started Guide for Advanced Programming Software APS A
20. R SHIELD 1 analog voltage VIN1 source 1 COM 1 VIN 2 2 Shielded twisted pair cable with shield COM 2 connected to ground only at one end SHIELD 2 SHIELD 3 3 To guard against electrostatic damage IIN3 and improve chassis grounding COM 3 connect one of the shield pins on the terminal block to the rack INI4i BEST coil analog current LINO source COM 0 i SHIELD 0 SHIELD 1 analog current IIN1 source COM 1 2 Shielded twisted pair cable with shield COM 2 connected to ground only at one end SHIELD 2 SHIELD 3 To guard against electrostatic damage 3 and improve chassis grounding COM 3 connect one of the shield pins on the terminal block to the rack Chapter 2 Installing And Wiring Your Module 17 Table 7 Input module terminal block connections Pin Label Function Channel 0 VINO High differential voltage input INI4vi only 0 1 LINO High differential current input 2 COM0 Low differential input voltage amp current analog ground 3 SHIELD 0 Chassis ground 4 SHIELD 1 Chassis ground 1 5 VIN1 High differential voltage
21. TION POSSIBLE EQUIPMENT OPERATION Before wiring your module always disconnect power from the SLC 500 system and from any other source to the module Failure to observe this precaution can cause unintended equipment operation and damage Before wiring the terminal block take some time to plan your system Ensure that the SLC 500 system is installed in a NEMA rated enclosure and that the SLC 500 system is properly grounded e Route the field wiring away from any other wiring and as far as possible from sources of electrical noise such as motors transformers contactors and ac devices As a general rule allow at lease 6 in about 15 2 cm of separation for every 120 V of power e Routing the field wiring in grounded conduit can reduce electrical noise further Ifthe field wiring must cross ac or power cables ensure that they cross at right angles To wire your module follow these steps 1 Determine the length of cable you need to connect a channel to its field device Remember to include additional cable to route the drain wire and foil shield to their ground points Chapter 2 Installing And Wiring Your Module 15 2 At each end of the cable strip some casing to expose the individual wires 3 Trim the exposed signal wires to 2 in lengths Strip about 3 16 in about 5 mm of insulation away to expose the end of each wire 4 At one end of the cable twist the drain wire and foil shield together ben
22. ad by the processor expressed in dB Common mode rejection ratio CMRR The ratio of a device s differential voltage gain to common mode voltage gain Expressed in dB CMRR is a comparative measure of a device s ability to reject interference caused by a voltage common to its terminal relative to ground Common mode voltage The voltage difference between the negative terminal and analog common during normal differential operation Common mode voltage range The largest voltage difference allowed between either the positive or negative terminal and analog common during normal differential operation Configuration word Contains the channel configuration information needed by the module to configure and operate each channel Information is written to the configuration word through the logic supplied in your ladder program Cut off frequency The frequency at which the input signal is attenuated 3 dB by the digital filter Frequency components of the input signal that are below the cut off frequency are passed with under 3 dB of attenuation for low pass filters dB decibel A logarithmic measure of the ratio of two signal levels Data scaling The data format that you select to define the logical increments of the channel data word Data word A 16 bit integer that represents the value of the analog input channel The channel data word is valid only when the channel is enabled and there are no channel errors
23. all Drift Current Inputs Voltage Inputs INI4vi only 0 15 of full scale 25 C 0 25 of full scale 60 C 0 10 of full scale 25 C 0 25 of full scale 60 C Offset 539 nA C Gain 50 5 ppm C Offset 352 uV C Gain 34 8 ppm C SLC 500 Isolated Analog Input Modules Table 4 Physical specifications LED Indicators Four green channel status indicators one for each channel One green module status indicator Recommended Cable Belden 8761 shielded twisted pair or equivalent Wire Size maximum One 12 24 AWG wire per terminal Terminal Block Removable supplied Table 5 Environmental specifications Operating Temperature 0 to 60 C 32 to 140 F Storage Temperature 40 to 85 C 40 to 185 F Relative Humidity 5 to 95 non condensing Certifications UL CUL and CE Hazardous Environment Classifications Class Division 2 Chapter 2 Installing And Wiring Your Module Read this chapter to install and wire your module This chapter covers avoiding electrostatic damage determining power requirements selecting a rack slot inserting your module into the rack wiring your module Note that although your module has a jumper on its printed circuit board this jumper is for the manufacturer s use only so do not alter its position Also your module was calibrated by the manufacturer so you don t need to perform this task You may however want to verify the calibration period
24. ce s ability to reject noise signals between or among circuit signal conductors but not between the equipment grounding conductor or signal reference structure and the signal conductors Overall accuracy The worst case deviation of the signal over the full range expressed in percent of full scale Rack A hardware assembly that houses devices such as I O modules adapter modules processor modules and power supplies Repeatability The closeness of agreement among repeated measurements of the same variable under the same conditions Resolution The smallest detectable change in a measurement typically expressed in engineering units e g 0 15 C or as a number of bits For example a 12 bit system has 4096 possible output states It can therefore measure part in 4096 See also effective resolution Sampling time The time required by the A D converter to sample an input channel Status word Contains status information about the channel s current configuration and operational state You can use this information in your ladder program to determine whether the channel data word is valid Step response time The time required for the A D signal to reach 95 of its expected final value given a full scale step change in the input signal Useful resolution See effective resolution Chapter 1 General Features And Benefits Overview And Specifications The 1746sc INI4i monitors up to 4 isolate
25. d analog current inputs while the 1746sc INI4vi monitors up to 4 isolated analog current or voltage inputs selectable by channel In both modules you can select different input ranges for example 4 20 mA or 1 5 Vdc independently by channel for optimal use of rack space Read this chapter to familiarize yourself further with your isolated analog module This chapter covers general features and benefits detailed specifications Increased Accuracy and Reliability Both modules provide 750 Vdc channel to channel isolation which means no electrical crosstalk between channels resulting in less noise and a high effective resolution They also provide 750 Vdc field wiring to backplane isolation to protect your processor and other rack components And for state of the art precision they offer 16 bits of resolution For added reliability both modules perform a battery of diagnostic tests at startup and can alert you to open input circuits through status bits and LEDs The open circuit response state is selectable Onboard over voltage and over current protection also help prevent damage to the module due to wiring errors Reduced System Costs Because channel to channel isolation is built into these modules they eliminate the need for expensive external analog isolation blocks and the time and space required to install them Both modules provide a single slot solution for applications requiring up to 4 mixed analog i
26. d them away from the cable and apply shrink wrap Foil Shield and Drain Wire Insulati nsulation Black Wire Clear Wire 5 At the other end of the cable cut the drain wire and foil shield back to the cable and apply shrink wrap Insulation Black Wire Clear Wire 6 Connect the wires to the terminal block and field device as shown in the following figures and table The recommended maximum torque is 5 in lb 0 565 Nm for all terminal screws To guard against electrostatic damage and improve chassis grounding connect one of the shield pins on the terminal block of your module to the chassis itself Important For CE compliance Ferrite EMI Suppressors are needed on each channel s terminal block connection Apply the suppressor close to the module terminal block as shown below A Steward Part 28B2024 0A0 or equivalent is recommended The Steward 28B2024 OAO has an impedance of 157 Q at 25 MHz 256 Q at 100 MHz and can accommodate one turn of wire Module 16 SLC 500 Isolated Analog Input Modules 7 Repeat steps 1 through 6 for each channel on your module A system may malfunction due to a change in its operating environment After installing and wiring your module check system operation See the system Installation and Operation Manual for more information Figure 1 Wiring diagrams showing differential inputs INI4vi VINO F analog current 0 source 7 COM 0 9 SHIELD 0
27. directly with the SLC 5 02 5 03 and 5 04 PID instruction without an intermediate scaling operation Use the input channel data as the process variable in the PID instruction Example Suppose your input module is in slot 3 and you have a level sensor with a 4 20 mA range connected to channel 0 The following figures show you how to use it for PID control Figure 11 PID control example Analog Output Signal Valve Analog Output 4 20 mA Module slot 1 Level 1746sc INI4i Sensor Analog Input Module slot 3 Analog Input Signal channel 0 40 SLC 500 Isolated Analog Input Modules Figure 12 Programming for PID control example Rung 2 0 First Pass Bit Initialize Module s l r MOV jf MOVE 15 Source N10 0 Dest O30 Allocate N11 0 to N11 22 for required Control Block file length of 23 words The Process Variable is at 3 0 which stores the value of input data word 0 channel 0 The output of the PID instruction Rung 2 1 Channel 0 Status is at N11 23 Control Variable address I 3 4 p PID jf PID 0 Control Block N11 0 Process Variable 1 0 Control Variable 23 Control Block Length 23 Set the Rate and Offset parameters for your application The Destination is typically an analog output channel Refer to the APS User Manual or Analog I O Modules User Manual for specific examples Rung 2 2 of the SLC instruction SCL SCALE
28. ht 1998 2004 Spectrum Controls Inc All rights reserved Printed in U S A Specifications subject to change without notice Publication 0300127 04 Rev F March 2009 U S A Headquarters Spectrum Controls Inc P O Box 5533 Bellevue Washington 98006 Fax 425 641 9473 Tel 425 746 9481 Web Site http www spectrumcontrols com E mail spectrum spectrumcontrols com SZ SPECTRUM C O N T R O L S
29. ically using the procedures provided in Appendix A The following documents contain information that may help you as you install and wire your module NFPA 79 Electrical Standard for Industrial Machinery published by the National Fire Protection Association of Boston MA National Electrical Code published by the National Fire Protection Association of Boston MA IEEE Standard 518 1977 Guide for the Installation of Electrical Equipment to Minimize Electrical Noise Inputs to Controllers from External Sources IEEE Standard 142 1982 Recommended Practices for Grounding of Industrial and Commercial Power Systems Noise Reduction Techniques in Electronic Systems by Henry W Ott published by Wiley Interscience of New York in 1976 12 SLC 500 Isolated Analog Input Modules Avoiding Electrostatic Damage Determining Power Requirements Guard against electrostatic damage by observing the following precautions CAUTION ELECTROSTATICALLY SENSITIVE COMPONENTS Before handling the module touch a grounded object to rid yourself of electrostatic charge When handling the module wear an approved wrist strap grounding device Handle the module from the front away from the backplane connector Do not touch backplane connector pins Keep the module in its static shield container when not in use or during shipment Failure to observe these precautions can degrade the module s performance or cause permanen
30. imit switches stop push buttons and interlocks should always be hard wired to the master control relay These circuits should also be wired in series so that when any one circuit opens the master control relay is de energized thereby removing power Never modify these circuits to defeat their function Serious injury or equipment damage may result Refer to your system s Installation amp Operation Manual for more information Appendix A Recommended Schedule Verifying Current Inputs Verifying Calibration Read this chapter to verify your module s calibration To verify your module s calibration you need e a precision input source whose accuracy is better than or equal to 1 mV ona 10 V scale and 50 5 uA on 8 20 mA scale such as an Electronic Development Corporation Programmable IEEE 488 GP IB DC Calibrator Model 521 e programming equipment such as an Allen Bradley Hand Held Terminal HHT or personal computer Allen Bradley Advanced Programming Software APS or equivalent Your module automatically calibrates a channel after it is successfully configured It also calibrates a channel every 10 seconds if auto calibration is enabled see Chapter 4 For these reasons your module should never need calibration You may however want to verify the calibration periodically using the procedures provided in this chapter Although not required you should verify your module s calibration once a year or after
31. ing your module you must configure each channel by setting bit values in each configuration word Output words 0 through 3 of the output image file addresses O e 0 through O e 3 configure channels 0 through 3 respectively 15 0 Channel 0 Configuration Word Channel 1 Configuration Word Channel 2 Configuration Word Channel 3 Configuration Word Important After reconfiguring a channel you must toggle the channel enable bit configuration bit 0 in order for your module to use the new configuration A detailed explanation appears in the following table Chapter 4 Using Your Input Module 29 Table 13 Input channel configuration word O e 0 through O e 3 Use these bit settings in the channel configuration word To select 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Input channel disable 0 Input channel enable 1 10 Vdc input range INI4vi only 0 0 0 1 5 Vdc input range INI4vi only 0 0 1 0 5 Vdc input range INI4vi only 0 1 0 0 10 Vdc input range INI4vi only 0 1 1 0 20 mA input range 1 0 0 4 20 mA input range 1 0 1 Invalid 1 1 0 Invalid 1 1 1 Engineering units 0 0 0 Scaledfor PID 0 0 1 Proportional counts 0 1 0 1746 NI4 compatible format 0 1 1 User defined scale A 1 0 0 User defined scale B 1 0 1 Invalid 1 1 0 Invalid 1 1 1 Zero on open input circuit D Max on open input circuit Min on open input circuit
32. input INI4vi only 6 1 High differential current input 7 COM1 Low differential input voltage amp current analog ground 8 VIN2 High differential voltage input INI4vi only 2 9 IN 2 High differential current input 10 COM 2 Low differential input voltage amp current analog ground 11 SHIELD 2 Chassis ground 12 SHIELD 3 Chassis ground 3 13 VIN3 High differential voltage input INI4vi only 14 IIN3 High differential current input 15 COM3 Low differential input voltage amp current analog ground The shields are all internally connected to chassis ground through high voltage capacitors SLC 500 Isolated Analog Input Modules Figure 2 Wiring schematic for 2 3 and 4 wire analog inputs Important Your module does not provide power for analog inputs Use a power supply that matches the transmitter specifications 2 Wire Transmitter Power 69 Transmitter Module channel OQ 0 In Supply O Common 8 3 Wire Transmitter Transmitter Supply Signal GND Module channel Power O Cm Ome O In Supply O O Common 4 Wire Transmitter Transmitter Supply Signal Module channel Power O In Supply C7 Common Figure 3 Wiring schematic for single ended analog inputs Important With single ended inputs the channels are not i
33. le B These data formats are defined in the following table Chapter 4 Using Your Input Module 31 Table 14 Data format definitions Selected Actual Signal Limits Count Limits Data Format Input Range Min Max Min Max Engineering Units 10V 10 25V 10250 10250 0 10V 0 50V 10 25V 500 10250 0 5 V 0 50 V 5 50 V 500 5500 1 5 V 0 50 V 5 50 V 500 5500 0 20 mA 0 0mA 20 5 mA 0 20500 4 20 mA 3 5 mA 20 5 mA 3500 20500 Scaled for PID 10V 10 V 10 V 0 16383 0 10 V 0V 10V 0 16383 0 5 V OV 5V 0 16383 1 5V HV 5 V 0 16383 0 20 mA 0 mA 20 mA 0 16383 4 20 mA 4 mA 20 mA 0 16383 Proportional Counts 10 V 10 25V 10 25V 32768 32767 0 10 V 0 50V 10 25V 32768 32767 0 5 V 0 50 V 5 50 V 32768 32767 1 5 V 0 50 V 5 50 V 32768 32767 0 20 mA 0 0mA 20 5 mA 32768 32767 4 20 mA 3 5 mA 20 5 mA 32768 32767 1746 NI4 10V 10V 10V 32768 32767 compatible 0 10 V 0V 10 V 0 32767 0 5 V 0V 5V 0 16384 1 5V HV 5V 3277 16384 0 20 mA 0 mA 20 mA 0 16384 4 20 mA 4 m 20 mA 3277 16384 User defined 10 V 10 25V 10 25 V scale A and B 0 10 V 0 50V 10 25V 0 5 V 0 50 V 5 50 V See note 1 5 V 0 50 V 5 50 V 0 20 mA 0 0 mA 20 5 mA 4 20 mA 3 5mA 20 5 mA Provides direct compatibility with the 1746 NI4 module For user defined scale A or B the data in output words 4 and 5 or 6 and 7 determine the count limits See the next subsection Setting The User
34. ling your module sets the signal limits to 3 5 mA and 20 5 mA see Table 14 After entering 100 and 9999 into output words 4 and 5 or 6 and 7 respectively the relationship between input signal and data value counts would be as follows Figure 10 Graph of signal value vs data value Data Value 9999 100 Signal Value 3 5 mA 20 5 mA Chapter 4 Using Your Input Module 35 Monitoring Each Input Channel Address 0 1 2 43 Checking Each Input Channel s Configuration And Status Address 4 5 6 7 In the preceding example Siw 3 5 U 100 Sige 205 Use 9999 AS 7 AU 9899 The input signal data resides in words 0 through 3 of the input image file addresses I e 0 through I e 3 The values present depend on the input types and data formats selected When an input channel is disabled its data word is set to zero ete lt r Channel 0 Data Word Channel 1 Data Word Channel 2 Data Word Channel 3 Data Word Words 4 through 7 of the input image file addresses 1 6 4 through 1 6 7 reflect the configuration and status of each channel Use the data provided in these status words to determine if the configuration data for any channel is valid Channel 0 Status Word i L 1 1 1 1 Channel 1 Status Word Channel 2 Status Word Channel 3 Status Word 1 1 1 1 1 Whenever 8 channel is disabled its stat
35. lter is programmable letting you select one of four filter frequencies for each channel The digital filter provides the highest noise rejection at the selected filter frequency For example to reject the noise associated with 60 Hz power you may want to select the 60 Hz filter The filter frequency you select determines that channel s 3 dB cut off frequency full scale step response time worst case effective resolution and channel update time as shown in Tables 8 and 9 Table 8 Cut off frequency step response time amp effective resolution based on filter frequency Worst Case Effective Res Filter 3 dB Cut Off Full Scale Step Resp Voltage Mode Current Mode 50 Hz 13 1 Hz 80 ms 12 bits 11 bits 60 15 7 66 7 12 11 250 65 5 16 11 5 10 5 500 131 8 9 5 9 5 For a 16 bit device like the 1746sc INI4i and INI4vi a worst case effective resolution of 12 bits means that the data may fluctuate by as much as 16 counts 4 bits Typically the effective resolution is greater than that listed here Chapter 3 Things To Consider Before Using Your Module 23 Table 9 Channel update time based on number of channels enabled and filter frequency of ch enabled 50 Hz Filter Frequency 60 Hz 250 Hz 500 Hz Current Input gt a O PP 16 6 ms 4 0 ms 4 1 ms Voltage Input INI4vi only 17 7 7 3 7 3 16 6 10 6 10 7 17 0 13 8 13 8 16 6 ms 5 0 ms 5 0 ms 17 2 9 2 9 2 16 6 13 5 13 5 18 0 18 0 1
36. me and full scale step response time Figure 5 Channel update time and full scale step response time 100 80 60 40 20 eee ee ele eo Y 0 y Channel Updates Full Scale Step Response Time Time ms The actual channel update time and full scale step response time depend on a number of things such as the filter frequency selected Because of this the number of channel updates than can occur before the channel data word reaches 95 of its expected value can vary 22 SLC 500 Isolated Analog Input Modules Selecting An Input Filter Frequency In general you can reduce the channel update time by doing any of the following e disabling unused channels e selecting a higher frequency input filter You can reduce the full scale step response time by selecting a higher frequency input filter Note however that selecting a higher frequency input filter decreases the noise rejection and effective resolution as described in the next subsection Selecting An Input Filter Frequency For the fastest possible channel update time enable only one channel and select a 250 or 500 Hz filter Conversely your module operates most slowly if you enable all 4 channels and select a 50 Hz filter for each The 1746sc INI4i and 1746sc INI4vi input modules use a digital filter to reject the high frequency noise that can couple into an analog input signal This digital fi
37. ng Calibration Index Figures Tables Chapter 7 Preventive Maintenance Ne 47 Safety Considerations 4 47 Appendix A Recommended Schedule pp 49 Verifying Current InpUtS ceccceeeeceseceeeeeeeceeeeeeeeceeeeceeeeeaeeseeeesaneeeeesaees 49 Verifying Voltage Inputs INI4Vi only 50 AN 50 0 51 Figure 1 Wiring diagrams showing differential inputs pp 16 Figure 2 Wiring schematic for 2 3 and 4 wire analog inputs 18 Figure 3 Wiring schematic for single ended analog 18 Figure 4 Image table for your isolated analog input 006 20 Figure 5 Channel update time and full scale step response time 21 Figure 6 Signal attenuation with 50 Hz input filter u u dsseneserennes 23 Figure 7 Signal attenuation with 60 Hz input filter pp 24 Figure 8 Signal attenuation with 250 Hz input filter scenerne 24 Figure 9 Signal attenuation with 500 Hz input filter pp 25 Figure 10 Graph of signal value vs data value pp 34 Figure 11 PID control ea 39 Figure 12 Programming for PID control example ppp 40 Figure 13 Data table for PID control example c cceceeteeeeeeereeeeeee 40 Figure 14 User defined scaling example pp 41 Figure 15 Programming for user defined scaling example pp 41 Figure 16 Data table for user defined scaling example pp 41 Figure 17 LED POKR a ae A S 45 Figure 18 Problem resolution flowchart pp 46 Table 1 Related Allen Bradley docume
38. nputs They also feature auto calibration so you never have to perform this time consuming task SLC 500 Isolated Analog Input Modules Detailed Specifications State of the Art Performance These modules incorporate proprietary Allen Bradley technology so they operate and perform like the latest high performance Allen Bradley products for full compatibility Four selectable filter frequencies are provided for signal noise optimization For even greater convenience they are fully configured through software no DIP switches can alert the processor to a variety of errors through status bits and can scale input signals to user defined ranges without any ladder programming Table 2 Electrical specifications module Backplane Current Consumption typical 1746sc INI4i 440 mA 5 Vdc 0 mA 24 Vdc 1746sc INI4vi 550 mA 5 Vde 0 mA 24 Vdc Backplane Power Consumption typical 2 75 W Number Of Channels 4 differential individually isolated I O Chassis Location Any 1746 I O module slot except slot 0 A D Conversion Method Sigma Delta Input Filtering Programmable notch filters Normal Mode Rejection 98 dB 50 Hz between and inputs 98 dB 60 Hz Common Mode Rejection 99 dB 1 kHz 25 C between inputs and chassis ground Calibration Factory calibrated Autocalibrated every 10 sec when enabled Opto Electrical Isolation 10 sec 750 Vdc channel to channel 750 Vdc field wiring to backplane Module ID Code 1746
39. ntation pp 4 Table 2 Electrical specifications module pp 8 Table 3 Electrical specificationS iNput W W u u ssssseneeerereren kernens en nen ennen 9 Table 4 Physical Specification 4 10 Table 5 Environmental specifications u u u dsseeeueereren ennen renen ener renen 10 Table 6 Backplane current consumed pp 12 Table 7 Input module terminal block connections ppp 17 Table 8 Cut off frequency step response time amp effective resolution 22 Table 9 Channel update time 7 23 Table 10 Auto calibration time per Channel pp 25 Table 11 Channel enable and disable times pp 25 Table 12 Module ID COda Spa a E n AARAA 27 Table 13 Input channel configuration word O e 0 through O e 3 29 Table 14 Data format definitions u u sssseeueeeevererenenen ener enes nn nen tree nn nes 31 Table 15 Input channel status word 1 e 4 through I e 7 neess 36 Table 16 CED anean sedooes ot inecedonenthacttebackochosteaatingesdoote et 45 Who Should Use This Guide What This Guide Covers Related Allen Bradley Documents Preface Read this preface to familiarize yourself with the rest of the owner s guide This preface covers e who should use this guide what this guide provides related Allen Bradley documents terms amp abbreviations you should know Use this guide if you design install program or maintain a control system that uses Allen Bradley Small Logic
40. observe this precaution can cause improper module operation or equipment damage 44 SLC 500 Isolated Analog Input Modules Disconnecting Prime Movers Powering Up 2 Ensure that the shield for the cable used to wire your module is properly grounded Refer to Chapter 2 Installing And Wiring Your Module for more information 3 Ensure that the removable terminal block on your module is secure Before testing your module ensure that machine motion will not occur Disconnect motor wires at the motor starter or the motor itself This lets you test the operation of the starter coil verifying that the output circuit is wired correctly and functioning Disconnect solenoids by disengaging the solenoid valves leaving the coils connected If you cannot disconnect a device in the preferred way open the output circuit as close as possible to the motion causing device Example If you have a relay coil that in turn energizes a motor starter and you cannot disconnect the motor wires open the circuit at a point between the motor starter and the relay contact WARNING POSSIBLE UNEXPECTED MACHINE MOTION During all testing always disconnect all devices that when energized might cause machine motion Failure to observe this precaution can cause equipment damage or personal injury When you apply power to the system the module status LED should illuminate indicating that your module is receiving power and has
41. ogramming or services referenced herein The information in this owner s guide is subject to change without notice Limited Warranty Spectrum Controls warrants that its products are free from defects in material and workmanship under normal use and service as described in Spectrum Controls literature covering this product for a period of 1 year The obligations of Spectrum Controls under this warranty are limited to replacing or repairing at its option at its factory or facility any product which shall in the applicable period after shipment be returned to the Spectrum Controls facility transportation charges prepaid and which after examination is determined to the satisfaction of Spectrum Controls to be thus defective This warranty shall not apply to any such equipment which shall have been repaired or altered except by Spectrum Controls or which shall have been subject to misuse neglect or accident In no case shall the liability of Spectrum Controls exceed the purchase price The aforementioned provisions do not extend the original warranty period of any product which has either been repaired or replaced by Spectrum Controls Overview amp Specifications Installing And Wiring Your Module Things To Consider Before Using Your Module Using Your Input Module Programming Examples Testing Your Module Table Of Contents Preface Who Should Use This Guide pp 3 What This Guide Covers Ne 3 Related Allen Bradle
42. ource to the module in other words don t hot swap your module and disconnect any devices wired to the module Failure to observe this precaution can cause unintended equipment operation and damage When inserting your module into the rack you do not need to remove the supplied 16 position terminal block from the module If however you do remove the terminal block apply the supplied write on label to the terminal block and use the write on label to identify your module s location To remove the terminal block unscrew the two retaining screws at the top and bottom of the terminal block and using needle nose pliers carefully pry the terminal block loose To insert your module into the rack follow these steps 1 Align the circuit board of your module with the card guides at the top and bottom of the chassis 14 SLC 500 Isolated Analog Input Modules Wiring Your Module 2 Slide your module into the chassis until both top and bottom retaining clips are secure Apply firm even pressure on your module to attach it to its backplane connector Never force your module into the slot Cover all unused slots with the Card Slot Filler Allen Bradley part number 1746 N2 To remove your module press the retaining clips at the top and bottom of your module and slide it out To wire the terminal block you need asmall flat blade screwdriver e Belden 8761 shielded twisted pair cable or equivalent CAU
43. resolution but it also increases the channel update time Ahigher filter frequency decreases the update time but it also decreases the noise rejection and effective resolution Refer to Chapter 3 Things To Consider Before Using Your Module for more information on selecting a filter frequency Auto Calibration Enable configuration bit 11 Use this bit to enable or disable auto calibration When enabled auto calibration occurs every 10 seconds Auto calibration also occurs whenever you configure a channel regardless of the setting of this bit Unused Bits configuration bits 12 15 These bits are not defined To prevent a configuration error ensure that bits 12 through 15 are set to zero Chapter 4 Using Your Input Module 33 Setting The User Defined Scale Limits optional Address O e 4 O e 5 O e 6 O e 7 For special applications such as when using a sensor with a non standard operating range the 1746sc INI4i and 1746sc INI4vi input modules let you define up to two custom data formats These user defined scales are very similar to the proportional counts data format provided by your module and many Allen Bradley modules except that instead of scaling the input signal to a previously defined range 32 768 to 32 767 your module can scale the input signal to a range defined by the values in output words 4 and 5 for user defined scale A or output words 6 and 7 for user defined scale B 15
44. sc INI4i 3522 1746sc INI4vi 3520 Thermal Dissipation 3 25 W maximum Chapter 1 Overview And Specifications Table 3 Electrical specifications inputs Input Current Ranges selectable for each channel Input Voltage Ranges INI4vi only selectable for each channel SLC Communication Formats selectable for each channel Input Impedance Current Inputs Voltage Inputs INI4vi only Input Overcurrent Protection Input Overvoltage Protection INI4vi only Input Filter 3 dB Cut Off Frequencies selectable for each channel Input Step Response Time Channel Update Time minimum Current Inputs Voltage Inputs INI4vi only Input Resolution maximum Current Inputs Voltage Inputs INI4vi only Overall Accuracy 4to 20 mA 0to 20 mA 10 to 10 Vdc 0 to 10 Vdc 0 to 5 Vdc 1 to 5 Vdc Scaled engineering units Scaled for PID Proportional counts 1746 NI4 format User defined scale A User defined scale B Less than 250 0 Greater than 220 kQ 70 mA non continuous 33 mA continuous 50 Vdc continuous 13 1 Hz for 50 Hz filter 15 7 Hz for 60 Hz filter 65 5 Hz for 250 Hz filter 131 Hz for 500 Hz filter 80 ms for 50 Hz filter 66 7 ms for 60 Hz filter 16 ms for 250 Hz filter 8 ms for 500 Hz filter 14 ms with 500 Hz filters and all channels enabled 18 ms with 500 Hz filters and all channels enabled 16 bit 312 8 nA count 312 8 uV count Current Inputs Voltage Inputs INI4vi only Over
45. scales analog input values to a binary input register value if one of the user defined scale data formats is selected Input Image Data And Status Words The 8 word input image defined as the input from your module to the SLC processor holds the data received by your module and provides the status configuration and operational state of each channel Chapter 3 Things To Consider Before Using Your Module 21 The Difference Between Channel Update Time amp Step Response Time Percent of final value Important A data word is valid only when the channel is enabled and there are no channel errors A status word is valid only when the channel is enabled and the module has processed all configuration changes The speed of an analog module can be defined in 2 distinctly different ways either by the channel update time or by the full scale step response time The channel update time is the time required for your module to sample and convert the input signal of an enabled channel and make the resulting data available to the processor The full scale step response time is the time required for a channel s data word to reach 95 of the expected final value given a full scale step change in the input signal This means that if an input signal changes faster than the full scale step response time the signal value provided to the processor has not reached 95 Figure 5 illustrates the difference between channel update ti
46. se a malfunctioning of the SLC system or damage to the components WARNING POSSIBLE LOOSE CONNECTIONS Before inspecting connections always ensure that incoming power is OFF Failure to observe this precaution can cause personal injury and equipment damage Safety is always the most important consideration Actively think about the safety of yourself and others as well as the condition of your equipment The following are some things to consider Indicator Lights When the module status LED on your module is illuminated your module is receiving power Activating Devices When Troubleshooting Never reach into a machine to activate a device the machine may move unexpectedly Use a wooden stick 48 SLC 500 Isolated Analog Input Modules Standing Clear Of Machinery When troubleshooting a problem with any SLC 500 system have all personnel remain clear of machinery The problem may be intermittent and the machine may move unexpectedly Have someone ready to operate an emergency stop switch CAUTION POSSIBLE EQUIPMENT OPERATION Never reach into a machine to actuate a switch Also remove all electrical power at the main power disconnect switches before checking electrical connections or inputs outputs causing machine motion Failure to observe these precautions can cause personal injury or equipment damage Safety Circuits Circuits installed on machinery for safety reasons like over travel l
47. solated from each other Also single ended inputs are less immune to noise than differential inputs Power O Supply O Transmitter Input Module Fe AS O Vin0 O Signal O lind Common 0 Transmitter O Shield Shield IO Signal Vint 5 lin 1 Transmitter O Common 1 Vin2 HO Signal O lin2 O Common 2 Transmitter SER Supply Signal le 4 GND O Vin3 0 0 O lin3 O Common 3 Chapter 3 How The Processor Communicates With Your Module Things To Consider Before Using Your Module Read this chapter to familiarize yourself with how the processor communicates with your module the difference between channel update time and step response time selecting an input filter frequency auto calibration time channel enable and disable times e your module s response to slot disabling Your processor transfers data to and receives data from the processor through an image table residing in the data files of your processor The processor updates this image table once during each scan of your ladder program Figure 4 shows the output and input image table for your input module 20 SLC 500 Isolated Analog Input Modules SLC 5 0X Data Files Output TTT Ste Sa Output Image Input Slote Scar Input Image Figure 4 Image table for your isolated analog input module
48. t 14 set 1 Non fatal channel error such as an invalid configuration word Check the configuration word Correct and Retry Bit 13 set 1 Low range error The input signal is very near or below the minimum limit for the channel Correct and Retry Enable channel if desired by setting channel config word bit 0 1 Retry Is problem corrected Yes End Bit 12 set 1 High range error The input signal is very near or above the maximum limit for the channel Correct and Retry Contact you local distributor or Spectrum Controls Chapter 7 Preventive Maintenance Safety Considerations Maintaining Your Module And Ensuring Safety Read this chapter to familiarize yourself with preventive maintenance safety considerations The National Fire Protection Association NFPA recommends maintenance procedures for electrical equipment Refer to article 70B of the NFPA for general safety related work practices The printed circuit boards of your module must be protected from dirt oil moisture and other airborne contaminants To protect these boards install the SLC 500 system in an enclosure suitable for its operating environment Keep the interior of the enclosure clean and whenever possible keep the enclosure door closed Also regularly inspect the terminal connections for tightness Loose connections may cau
49. t damage The backplane of the SLC 500 system can provide both 5 Vdc and 24 Vdc power The following table shows the current consumed by your module when using these power sources Table 6 Backplane current consumed Catalog Number 5Vde 24 Vde 1746sc INI4i 440 mA typical 0 mA 1746sc INI4vi 550 mA typical 0 mA Use this table to calculate the total load on the system power supply For more information see the system Installation and Operation Manual Important Your module does not supply power for input devices You must supply the appropriate power Chapter 2 Installing And Wiring Your Module 13 Selecting A Rack Slot Inserting Your Module Into The Rack Two factors determine where you should install your module in the rack ambient temperature and electrical noise When selecting a slot for your module try to position your module inarack close to the bottom of the enclosure since hot air rises away from modules that generate significant heat such as 32 point input output modules e ina slot away from ac or high voltage dc modules hard contact switches relays and ac motor drives away from the rack power supply if using a modular system Remember that in a modular system the processor always occupies the first slot of the first rack CAUTION POSSIBLE EQUIPMENT OPERATION Before installing or removing your module always disconnect power from the SLC 500 system and from any other s
50. the processor image table remains in its last state When you re enable the input module s slot the processor image table is updated during the next scan Chapter 4 Entering Your Module s ID Code Using Your Input Module Read this chapter to e enter your input module s ID code configure each input channel set the user defined scale limits optional monitor each input channel check each input channel s configuration and status To use your module you need programming equipment such as an Allen Bradley Hand Held Terminal HHT or personal computer Allen Bradley Advanced Programming Software APS or equivalent For help with APS see the Getting Started Guide for APS Before using your module you must configure the slot your module is in by entering your module s ID code in APS To enter your module s ID code select other from the list of modules on the APS system I O configuration display and enter your module s ID code at the prompt The module ID code for your input module is Table 12 Module ID codes Catalog Number Module ID Code 1746sc INI4i 3522 1746sc INI4vi 3520 No special I O configuration SPIO CONFIG information is required The module ID code automatically assigns the correct number of input and output words for the processor to access 28 SLC 500 Isolated Analog Input Modules Configuring Each Input Channel Address O e 0 After install
51. us word is set to zero This condition tells you that input data in the data word for that channel is not valid and should be ignored A detailed explanation appears in Table 15 36 SLC 500 Isolated Analog Input Modules Table 15 Input channel status word l e 4 through I e 7 These bit settings in the status word 15 14 13 12 1 10 9 8 7 6 5 4 Indicate this Input channel disabled Input channel enabled OOOO O O O O O O 5 10 Vdc input range 1 5 Vdc input range 0 5 Vdc input range 0 10 Vdc input range 0 20 mA input range 4 20 mA input range Engineering units Scaled for PID Proportional counts 1746 NI4 format User defined scale A User defined scale B 0 0 0 0 0 1 0 1 0 0 1 1 1 0 0 1 0 1 0 0 0 1 1 0 Zero on open input circuit Max on open input circuit Min on open input circuit O O O O 60 Hz input filter 50 Hz input filter 150 Hz input filter 500 Hz input filter Auto calibration disabled Auto calibration enabled No error Over range error No error Under range error No error Non fatal channel error No error Fatal channel error Chapter 4 Using Your Input Module 37 The first 12 status bits reflect the settings in the channel configuration word The remaining status bits flag the various errors that the module can detect Over Range Error status bit 12 This bit is set to one whenever your module detects an
52. y Documents pp 3 Terms amp Abbreviations You Should 4 Chapter 1 General Features And Benefits pp 7 Detailed Specifications sssini neribus aan 8 Chapter 2 Avoiding Electrostatic Damage pp 12 Determining Power Requirements pp 12 Selecting A Rack 01 13 Inserting Your Module Into The Rack pp 13 Wiring Your Module 14 Chapter 3 How The Processor Communicates With Your Module pp 19 The Difference Between Channel Update Time amp Step Response Time 21 Selecting An Input Filter Frequency Ne 22 Auto Calibration TIME sresti inus niniaren eee a paataan aana 25 Channel Enable And Disable Times pp 25 Your Module s Response To Slot Disabling pp 26 Chapter 4 Entering Your Module s ID Code pp 27 Configuring Each Input Channel Ne 28 Setting The User Defined Scale Limits optional ccceeseceeteeeeeees 33 Monitoring Each Input Channel 35 Checking Each Input Channel s Configuration And Status pp 35 Chapter 5 PID 0 39 User Defined Scaling 41 Chapter 6 Inspecting Your Module 1 W ccc cceesseceeseececeeceeeeeceeeeeeeeeseeeceseeeeeseneeeesenenennes 43 Disconnecting Prime Movers Ne 44 Powering 0 6 44 Interpreting The LED Indicators pp 45 Interpreting I O Error Codes 45 Toubes hooting ssa 0 46 ii SLC 500 Isolated Analog Input Modules Maintaining Your Module And Ensuring Safety Verifyi
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