GE IC693CMM321-JJ Ethernet Module

Technical Specifications and Network Capabilities

This Ethernet interface controller provides network connectivity for Series 90-30 PLC systems. The GE IC693CMM321-JJ enables high-speed data exchange between multiple PLCs and host computers. You can integrate this module into existing plant-wide Ethernet networks easily. Its single-slot design fits into any standard 90-30 I/O rack position. The module weighs approximately 0.34 kilograms. Its dimensions measure 12.5 cm in height, 5.5 cm in width, and 11 cm in depth.

Parameter	Specification
Brand	GE Fanuc Automation
Model	IC693CMM321-JJ
Category	Ethernet Interface Controller / Communications Module
Weight	0.34 kg
Height	12.5 cm
Width	5.5 cm (single slot)
Depth	11 cm
Network Interface	1 x RJ45 (10Base-T / 100Base-TX)
Communication Speed	10/100 Mbps, auto-negotiating
Protocols Supported	TCP/IP, SRTP, Modbus TCP/IP, Ethernet Global Data
Number of Connections	16 simultaneous TCP/IP sockets
Flash Memory	1 MB for firmware and configuration
RAM	256 KB for data buffering
Energy Storage	None (no internal battery)
Component Count	Single PCB with processor, RAM, flash, and PHY

Data Exchange and Protocol Support

The module uses SRTP (Service Request Transfer Protocol) for GE PLC communications. It also supports Modbus TCP/IP for third-party device integration. Ethernet Global Data allows real-time data sharing between multiple PLCs. You can configure up to 16 simultaneous socket connections on this module. The GE IC693CMM321-JJ acts as a passive or active communication node. Consequently, it can initiate data transfers or respond to external requests.

Memory and Configuration Storage

The onboard flash memory holds the module’s operating firmware permanently. You can update this firmware through the Ethernet connection without special tools. The 256 KB of RAM buffers incoming and outgoing data packets. This buffering prevents data loss during network congestion events. The module stores no user programs or logic independently. Therefore, the main CPU retains all application code and configuration parameters. An LED status panel shows module health and network activity clearly.

Installation and Network Integration

You must assign an IP address to this module before network operation. Use the programming software’s hardware configuration tool for this task. The module draws all operating power from the 90-30 backplane. It requires no external power supply or battery for normal operation. You should use shielded Cat5e or Cat6 cables for best performance. These cables reduce electromagnetic interference from nearby industrial equipment.