GE IC694MDL754-CD

Introduction

GE IC694MDL754-CD is a high-density 32-channel digital output module for the PACSystems RX3i platform. It is designed to switch DC field loads using positive-logic outputs, making it suitable for industrial control systems that require a large number of discrete output points in a compact module.

The -CD version represents a specific hardware and firmware revision within the MDL754 family. Its firmware revision 1.20 provides backward compatibility with earlier versions of the module.

Where It Fits in the Control System

In an RX3i installation, this module operates between the PLC backplane and external field devices. The controller determines the required output state, while the module supplies DC power to connected sourcing loads.

Typical field devices can include solenoids, contactors, indicator devices, relays, and other compatible DC actuators.

Product Data

Item	Details
Part Number	IC694MDL754-CD
Product Family	PACSystems RX3i
Function	Digital output
Number of Channels	32
Signal Type	Positive logic
Nominal Supply	12/24 VDC
Allowable Output Voltage	10.2–30 VDC
Maximum Current	0.75 A/channel
Isolation	Optical field-to-backplane
Protection	ESCP with automatic recovery
ON Response	≤0.5 ms
OFF Response	≤0.5 ms
Module Consumption	Up to 300 mA from 5 VDC bus

The output stage supports a maximum 0.75 A per point, while the documented output voltage drop is up to 0.3 VDC.

Protection and Diagnostics

One of the notable characteristics of this output module is its Electronic Short Circuit Protection. The output circuitry provides short-circuit, overcurrent, and overtemperature protection with automatic recovery. A typical steady-state overcurrent trip level is approximately 5 A per point.

The module can also report output-driver faults, field-side power loss, terminal-block status, and related diagnostic conditions to the RX3i controller.

Practical Applications

The 32-channel architecture makes this module useful when a control panel must operate numerous discrete devices. It can be found in applications involving automated machinery, production equipment, packaging systems, conveyor controls, and general factory automation.

For systems with different DC load groups, the isolated output arrangement can provide additional wiring flexibility.

Replacement Notes

When replacing an existing unit, match the complete IC694MDL754-CD designation. Do not select a replacement based only on the general MDL754 family number, because different revisions may have different firmware histories.

The -CD version is documented with firmware 1.20 and is backward compatible with previous versions.

Before commissioning, check the field supply voltage, load current, terminal-block type, CPU firmware, and wiring. For installations in hazardous locations, follow the applicable RX3i safety requirements and power-down procedures specified by the manufacturer documentation.

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