Eaton D77A Installation And User Manual

Contents

Intelligent Technologies (IT.) D77A I/O Module Products22 For more information visit: www.EatonElectrical.com MN05002001ETheory of OperationThe IT. D77A I/O system consists of a collection of input and output modules connected together by QCPort to a network adapter. Thenetwork adapter connects to the industrial network where the controller usually is a PLC or DCS. The input modules collect digital orlinear signals from sensors (limit switches, proximity sensors, temperature transmitters, etc.) and deliver these data to the controldevice. In the control device, input data values are placed in data registers. Based on the input data, the control algorithm manipulatesvalues in the output registers. With each scan of the network, the input and output data registers are updated. With this update, theoutput modules have their digital or linear data changed to reflect the control algorithm found in the control device software. Theoutput devices (solenoid valves, motor starters, temperature gauges, etc.) effect changes to the machinery being controlled.Out-of-box Default OperationWhen the IT. D77A I/O modules are properly installed and each has a properly configured Group ID (address), no additionalconfiguration is needed for standard operation. To customize the configuration, refer to Configuration on page 34. After customizingthe configuration, the system can be restored to the default out-of-box configuration without a software tool such as CH Studio byfollowing 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 ApplicationFigure 16 illustrates a typical D77A I/O module application this is integrated with a number of IT. starters with QSNAPs. In thisexample, 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 QCPortconnection, both the I/O and the motor control are connected to a single network Adapter. The network adapter then represents theD77A I/O and motor control as remote I/O, allowing for control and monitoring of the QCPort devices.Figure 16: Panel Layout: Adapter, I/O and QSNAPa) PC or PLC Connectionb) I/O Modulesc) QCPort Connectiond) IT. Starters with QSNAPse) Power Tap/Terminator Resistorf) 24 V DC Power SupplyD77A-003acb d ef