Spectrum-controls 1746sc-INI4vi Manuel d'utilisateur

Owner’s Guide 0300127-04 Rev. FSLC 500™ ISOLATEDANALOG INPUT MODULESCatalog Numbers1746sc-INI4i1746sc-INI4vi

6 SLC 500™ Isolated Analog Input ModulesFull-scale range (FSR) – The difference between the maximum andminimum specified analog values.Gain drift – Th

Overview And SpecificationsThe 1746sc-INI4i monitors up to 4 isolated analog current inputs, whilethe 1746sc-INI4vi monitors up to 4 isolated analog c

8 SLC 500™ Isolated Analog Input ModulesState-of-the-Art PerformanceThese modules incorporate proprietary Allen-Bradley technology, so theyoperate and

Chapter 1: Overview And Specifications 9Table 3. Electrical specifications—inputsInput Current Ranges 4 to 20 mA(selectable for each channel) 0 to 20

10 SLC 500™ Isolated Analog Input ModulesTable 4. Physical specificationsLED Indicators Four green channel status indicators, one for each channelOne

Installing And Wiring Your ModuleRead this chapter to install and wire your module. This chapter covers:• avoiding electrostatic damage• determining p

12 SLC 500™ Isolated Analog Input ModulesAvoiding ElectrostaticDamageGuard against electrostatic damage by observing the followingprecautions:CAUTIONE

Chapter 2: Installing And Wiring Your Module 13Selecting A Rack SlotTwo factors determine where you should install your module in the rack:ambient tem

14 SLC 500™ Isolated Analog Input Modules2. Slide your module into the chassis until both top and bottom retainingclips are secure. Apply firm even pr

Chapter 2: Installing And Wiring Your Module 152. At each end of the cable, strip some casing to expose the individualwires.3. Trim the exposed signal

16 SLC 500™ Isolated Analog Input Modules7. Repeat steps 1 through 6 for each channel on your module.A system may malfunction due to a change in its o

Chapter 2: Installing And Wiring Your Module 17Table 7. Input module terminal block connections.Pin Label Function Channel0 V IN 0 + High differential

18 SLC 500™ Isolated Analog Input ModulesFigure 2. Wiring schematic for 2-, 3-, and 4-wire analog inputsImportant: Your module does not provide power

Things To Consider Before UsingYour ModuleRead this chapter to familiarize yourself with:• how the processor communicates with your module• the differ

20 SLC 500™ Isolated Analog Input ModulesFigure 4. Image table for your isolated analog input moduleOutput ImageSlot eInput ImageSlot eSLC 5/0XData Fi

Chapter 3: Things To Consider Before Using Your Module 21Important – A data word is valid only when the channel is enabled andthere are no channel err

22 SLC 500™ Isolated Analog Input ModulesIn general, you can reduce the channel update time by doing any of thefollowing:• disabling unused channels•

Chapter 3: Things To Consider Before Using Your Module 23Table 9. Channel update time(based on number of channels enabled and filter frequency)Filter

24 SLC 500™ Isolated Analog Input ModulesFigure 7. Signal attenuation with 60 Hz input filter0-20-40-60-80-100-120-140-160-180-2000 60 120 180 240 300

Chapter 3: Things To Consider Before Using Your Module 25Figure 9. Signal attenuation with 500 Hz input filter0-20-40-60-80-100-120-140-160-180-2000 5

Important Notes1. Read all the information in this guide before installing the product.2. The information in this owner's guide applies to hardwa

26 SLC 500™ Isolated Analog Input ModulesYour Module’sResponse To SlotDisablingBy writing to the status file in the modular SLC processor, you candisa

Using Your Input ModuleRead this chapter to:• enter your input module’s ID code• configure each input channel• set the user-defined scale limits (opti

28 SLC 500™ Isolated Analog Input ModulesConfiguring Each InputChannelAfter installing your module, you must configure each channel by settingbit valu

Chapter 4: Using Your Input Module 29Table 13. Input channel configuration word (O:e.0 through O:e.3)Use these bit settings in the channel configurati

30 SLC 500™ Isolated Analog Input ModulesInput Channel Enable (configuration bit 0)Use this bit to enable or disable a channel. To minimize update tim

Chapter 4: Using Your Input Module 31Table 14. Data format definitionsSelected Actual Signal Limits Count LimitsData Format Input Range Min. Max. Min.

32 SLC 500™ Isolated Analog Input ModulesOpen Input Circuit Response (configuration bits 7 and 8)For 1–5 Vdc and 4–20 mA inputs only, use this bit fie

Chapter 4: Using Your Input Module 33Setting The User-Defined Scale Limits(optional)For special applications (such as when using a sensor with a non-s

34 SLC 500™ Isolated Analog Input ModulesThe following equations show you how to convert user-defined scaleunits (or any type of units) to engineering

Chapter 4: Using Your Input Module 35In the preceding example...Slow= 3.5 Ulow= 100Shigh= 20.5 Uhigh= 9999∆S= 17 ∆U= 9899Monitoring Each InputChannelT

36 SLC 500™ Isolated Analog Input ModulesTable 15. Input channel status word (I:e.4 through I:e.7)These bit settings in the status word151413121110987

Chapter 4: Using Your Input Module 37The first 12 status bits reflect the settings in the channel configurationword. The remaining status bits flag th

38 SLC 500™ Isolated Analog Input Modules

Programming ExamplesRead this chapter to familiarize yourself with how to use the advancedfeatures of your module for:• PID control• user-defined scal

40 SLC 500™ Isolated Analog Input ModulesFigure 12. Programming for PID control example.Rung 2:1 Channel 0 StatusI:3.4 ] [ 0PIDPIDControl Block

Chapter 5: Ladder Program Examples 41User-Defined ScalingYour input module was designed to work directly with applicationsrequiring special data scali

42 SLC 500™ Isolated Analog Input Modules

Testing Your ModuleRead this chapter to prevent potential problems in a systematic andcontrolled way. This chapter covers:• inspecting your module• di

44 SLC 500™ Isolated Analog Input Modules2. Ensure that the shield for the cable used to wire your module isproperly grounded. Refer to Chapter 2, Ins

Chapter 6: Testing Your Module 45Interpreting The LEDIndicatorsYour module has five LEDs: four channel status LEDs (numbered 0–3for channels 0–3, resp

PrefaceWho Should Use This Guide... 3What This Guide Covers ...

46 SLC 500™ Isolated Analog Input ModulesTroubleshootingFigure 18. Problem resolution flowchartModuleStatus LED(s)off.Module faultcondition.Check to s

Maintaining Your ModuleAnd Ensuring SafetyRead this chapter to familiarize yourself with:• preventive maintenance• safety considerationsThe National F

48 SLC 500™ Isolated Analog Input ModulesStanding Clear Of Machinery – When troubleshooting a problem withany SLC 500 system, have all personnel remai

Verifying CalibrationRead this chapter to verify your module’s calibration.To verify your module’s calibration, you need:• a precision input source wh

50 SLC 500™ Isolated Analog Input Modules2. Let the operating temperature stabilize for 2 minutes.3. Use the precision input source to provide a 15 m

Index1746-NI4 compatibility, 30, 31AAbbreviations 4Accuracy 6, 9Addressing 19–21Ambient temperature 13Analog-to-digital conversion 4, 8APS 27Att

52 SLC 500™ Isolated Analog Input ModulesInspection 43Installation 13–14Isolation 7, 8JJumper 11LLadder programming 19examples 39LEDs 7, 10, 45

Getting TechnicalAssistanceIf you need technical assistance, please review the information in Chapter6, “Testing Your Module,” before calling your loc

The ENCOMPASS logo and SLC 500 are trademarks of Allen-Bradley Company, Inc. Copyright © 1998-2004, Spectrum Controls, Inc. All rightsreserved. Printe

ii SLC 500™ Isolated Analog Input ModulesMaintaining Your ModuleAnd Ensuring SafetyChapter 7Preventive Maintenance...

PrefaceRead this preface to familiarize yourself with the rest of the owner’sguide. This preface covers:• who should use this guide• what this guide p

4 SLC 500™ Isolated Analog Input ModulesTable 1. Related Allen-Bradley documentationAllen-Bradley Doc. No. Title1747-2.30 SLC 500 System OverviewSGI-1

Preface 5channel to convert the data received from the processor to analog outputsignals at the terminals.Chassis – See rack.Common mode rejection – T