GE IC693CMM302C Communications Module for Series 90-30 PLCs

The GE IC693CMM302C enables serial data exchange between Series 90-30 PLCs and external devices. You can install this module directly into any standard 90-30 rack slot. It connects operator interfaces, drives, and other controllers using RS-232 or RS-485. This module suits factory automation and process control networks.

Technical Specifications and Hardware Layout

This communications module measures 127 mm in height. Its width reaches 55 mm, and the depth equals 140 mm. The GE IC693CMM302C weighs approximately 0.35 kilograms. A single internal PCB holds all communication and isolation circuits. The module contains no energy storage capacitors or batteries. One 15-pin D-sub connector provides the serial interface for field wiring. A 48-pin edge connector interfaces directly with the 90-30 backplane. Three status LEDs indicate power, transmit, and receive activity.

Communication Performance and Configuration

The GE IC693CMM302C supports baud rates from 300 to 19.2 kbit/s. It operates as a Modbus RTU master or slave device. This module handles data lengths of 7 or 8 bits with various parity options. You can set the configuration using DIP switches on the rear panel. Consequently, this module integrates easily with third-party HMI panels and drives. The module supports RS-232 for point-to-point connections up to 15 meters. For RS-485, you can connect up to 32 devices on a multi-drop network. Galvanic isolation separates the serial port from the backplane logic.

Installation and Diagnostic Features

You must insert this module into any standard 90-30 rack slot. Transitioning to wiring, use shielded serial cables for noise immunity. Two rotary switches set the station address from 1 to 99. Three front LEDs show power, communication activity, and error status. A watchdog timer resets the module after 500 ms of inactivity. The operating temperature range spans from 0°C to 60°C reliably.