Eaton Electrical D77A Theory of Operation, Out-of-box Default Operation, Typical Application

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Intelligent Technologies (IT.) D77A I/O Module Products

Theory of Operation

The IT. D77A I/O system consists of a collection of input and output modules connected together by QCPort to a network adapter. The network adapter connects to the industrial network where the controller usually is a PLC or DCS. The input modules collect digital or linear signals from sensors (limit switches, proximity sensors, temperature transmitters, etc.) and deliver these data to the control device. In the control device, input data values are placed in data registers. Based on the input data, the control algorithm manipulates values in the output registers. With each scan of the network, the input and output data registers are updated. With this update, the output modules have their digital or linear data changed to reflect the control algorithm found in the control device software. The output devices (solenoid valves, motor starters, temperature gauges, etc.) effect changes to the machinery being controlled.

Out-of-box Default Operation

When the IT. D77A I/O modules are properly installed and each has a properly configured Group ID (address), no additional configuration is needed for standard operation. To customize the configuration, refer to Configuration on page 34. After customizing the configuration, the system can be restored to the default out-of-box configuration without a software tool such as CH Studio by following these steps.

1.Using a screwdriver, rotate the Group ID Switch from the “0” position to the “1” position.

2.Repeat this action five times.

The status LED rapid flashes, signaling that the system is reset to the out-of-box default settings.

Typical Application

Figure 16 illustrates a typical D77A I/O module application this is integrated with a number of IT. starters with QSNAPs. In this example, a D77A I/O is part of a larger system where motor control and I/O are required within a single panel. On the same QCPort connection, both the I/O and the motor control are connected to a single network Adapter. The network adapter then represents the D77A I/O and motor control as remote I/O, allowing for control and monitoring of the QCPort devices.

b

e

a

d

 

 

f

c

 

 

D77A-003

Figure 16: Panel Layout: Adapter, I/O and QSNAP

a)PC or PLC Connection

b)I/O Modules

c)QCPort Connection

d)IT. Starters with QSNAPs

e)Power Tap/Terminator Resistor

f)24 V DC Power Supply

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For more information visit: www.EatonElectrical.com

MN05002001E

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Contents Intelligent Technologies IT D77A I/O Module Products D77A-AI8D77A-AI8AQ8Page Important Notice Please Read Table of Contents List of Figures List of TablesPage Safety Definitions and SymbolsHazardous High Voltage General Safety Avis AvisoDiscrete Input Modules IntroductionAll Modules Discrete Output ModulesAnalog Output Modules Discrete Combination ModulesAnalog Input Modules Approval CertificationsD77A a Q 16 Catalog Numbering SystemSpecifications Physical DescriptionDimensional Data Power RequirementsSurge Suppression Category Description Specification Environmental SpecificationsDevice Default I/O Data Bit ByteModule Summary Voltage Part NumberType I/O Description Input Specifications AC Input Module SpecificationsCatalog Number D77A-AI8 D77A-AI16 DC Input Module Specifications Catalog Number D77A-DI8 D77A-DI16Analog Input Module Specifications D77A-NI4 Catalog Number Voltage Input Current Loop InputSee D77A-NI4 Analog Input Module Specifications on Bit Resolution Equations Output Specifications AC Output Module SpecificationsCatalog Number D77A-AQ8 D77A-AQ16 DC Output Module Specifications Catalog Number D77A-DQ8 D77A-DQ16Relay Output Module Specifications Catalog Number D77A-RQ8 D77A-RQ16Analog Output Module Specifications D77A-NI4 Catalog Number Voltage Output Current Loop OutputAnalog Output Curves for 14 Bit Resolution Special I/O Specifications Combination Module SpecificationsCatalog Number DC Sink/Source Input DC Mosfet Sink Output D77A-DI8RQ8 Catalog Number DC Sink/Source Input Relay OutputD77A-AI8AQ8 Catalog Number AC Input AC OutputD77A-AI8RQ8 Catalog Number AC Input Relay OutputOut-of-box Default Operation Theory of OperationTypical Application Function Discrete Input Module OperationDiscrete Combination Module Operation Filter Setting Total Update Time ADC CPUCPU DAC Installation Setting Group IDInstallation Without Backplane Module PreparationInstalling the Module Installation With Backplane Do not rock the module onto the DIN rail QCPort Connections Interconnects/ConnectionsPre-manufactured QCPort Interconnect Cables Configuration O PropertyField Wiring Symbol DefinitionMOV AC Input Wiring AC InputsDC Input Wiring DC InputsAnalog Input Wiring Analog InputsAC Output Wiring AC OutputsDC Output Wiring DC OutputsRelay Output Wiring Relay OutputsAnalog Output Wiring Analog OutputsCombination I/O Wiring Combination I/OStatus LED Troubleshooting and MaintenanceFault Codes State LED BehaviorRenewal Parts TroubleshootingCommunication Troubleshooting Hints Explanation of LED Duty Cycle StatesProblem Solution Communication HintsStatus LED Description Explanation Size Description Appendix aData Parameters Byte BitSign Bit = True = False + Configuration Parameters Mode Description Active/Passive0x8006 32774 Slave Address Timer will not decrement Publications IT. Publications and SupportAnalog Data Registers Publication DescriptionCompany Information
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