What Is the IC693CMM311 Communications Coprocessor Module?
Struggling to integrate legacy PLC systems with modern communication protocols? The GE IC693CMM311 Communications Coprocessor Module offers a proven solution for the Series 90-30 platform. Formerly manufactured by GE Fanuc and now under Emerson Automation, this module provides flexible serial connectivity to modular CPUs.
Technical Specifications Breakdown
The IC693CMM311 operates with a backplane current draw of 400 mA at +5 VDC, ensuring reliable power consumption within the baseplate. It occupies a single slot and can be placed in any slot except the CPU slot. The module supports communication speeds of 300, 600, 1200, 240, 4800, 9600, and 19200 Baud rate, covering a wide range of legacy and modern device requirements.
Industry Applications
In manufacturing environments where older GE Series 90-30 PLCs control critical processes, the IC693CMM311 enables seamless data exchange with supervisory systems. For example, a water treatment plant using a modular Series 90-30 CPU can deploy this module to connect RTUs via the RTU protocol, ensuring reliable remote monitoring. Similarly, in a packaging line, the CCM protocol on both ports can link multiple controllers for coordinated operation.
Installation & Setup Guidance
Mount the IC693CMM311 in any slot of the Series 90-30 CPU baseplate except the CPU slot. Use the pre-assembled IC693CBL305 Wye cable to separate the two 25-pin D-shell ports for easier wiring. Configure the module using default settings or configuration software, selecting protocol combinations such as CCM on both ports or SNP on port 1 with RTU on port 2. The module includes a push-to-restart button to re-initiate communication without power cycling the entire system.
Maintenance & Reliability
Regularly inspect the status LED indicators (Module OK, PORT1, PORT2) to verify operational health. Since the module is discontinued/obsolete, periodic checks of communication integrity are recommended to avoid unexpected downtime. Ensure the baseplate environment remains within standard industrial conditions to prolong service life.
Compatibility & Integration
This module is compatible with all modular GE Series 90-30 CPUs but not with embedded CPUs like the 311, 313, or 323. It supports up to four CMM modules per baseplate (for CPUs model 331 and later). Supported protocols include CCM, RTU, and SNP, with Port 1 configured for RS232 and Port 2 for RS232 or RS485 applications. The IC693CMM311 integrates directly into the CPU baseplate without additional adapters.
Buying Guide & Purchasing Advice
Before ordering, verify that your Series 90-30 system uses a modular CPU (not embedded). The IC693CMM311 is discontinued/obsolete, so contact SpareTechPLC to confirm current stock and availability. Consider purchasing the IC693CBL305 Wye cable separately if not included. SpareTechPLC offers reliable sourcing for legacy GE Fanuc automation parts.
Frequently Asked Questions
Q1: Can the IC693CMM311 be used with embedded CPUs like the GE 311?
No. The IC693CMM311 is not compatible with embedded CPUs; it works only with modular Series 90-30 CPUs.
Q2: What communication protocols does the IC693CMM311 support?
It supports CCM, RTU, and SNP protocols, configurable in various combinations across its two ports.
Q3: How many IC693CMM311 modules can be installed in one baseplate?
Up to four modules can be installed in a CPU baseplate, provided the CPU is model 331 or later.
Q4: What cable is recommended for connecting the IC693CMM311?
The pre-assembled IC693CBL305 Wye cable is recommended to simplify wiring of the two 25-pin D-shell ports.
Q5: Is the IC693CMM311 still in production?
No, this module is discontinued/obsolete. Please contact SpareTechPLC for current availability and replacement options.
