GE Fanuc IC693CMM311K Communications Coprocessor Module

The GE Fanuc IC693CMM311K, also cataloged as the IC693CMM311 Communications Coprocessor Module, operates as a dedicated hardware component for serial communication offloading and multi-protocol datagram management within GE Series 90-30 PLC platforms. Installed directly into any standard I/O slot of a modular baseplate, the module processes serial data traffic across 2 independent physical ports to interface host controllers, programming terminals, and field devices without burdening main CPU scan execution.

Hardware Specifications

Backplane Bus Communication Velocity & I/O Density Scaling

Interfacing directly with the Series 90-30 backplane bus, the IC693CMM311K preserves backplane bus communication velocity by executing serial message framing, handshake timing, and protocol parsing asynchronously. Front-panel status LEDs (Module OK, PORT1, PORT2) provide instant diagnostic feedback for backplane handshakes and serial link activity. Optical isolation between internal logic elements and external serial port drivers protects internal CPU backplane traces from transient voltage spikes and ground loop currents across expanded network topologies.

Frequently Asked Questions

Q: Which baseplate slots are compatible with the IC693CMM311K communications module?

A: The IC693CMM311K can be installed in any standard I/O module slot on a Series 90-30 modular baseplate, with the exception of Slot 1, which is reserved exclusively for the CPU module.

Q: How many IC693CMM311K modules can be integrated into a single Series 90-30 system?

A: A maximum of four (4) CMM modules can be installed simultaneously in a single modular Series 90-30 CPU system to expand serial network connectivity.

Q: What power rail does the IC693CMM311K draw power from, and what is its electrical load?

A: The module draws its operating power directly from the baseplate backplane bus, consuming 400 mA at +5 VDC.

Field Installation Guidelines

1. Disconnect and lock out all main power feeds to the Series 90-30 baseplate and field communication loops before inserting the module.
2. Align the top rear retention hook of the IC693CMM311K with the top mounting slot of the chosen baseplate position.
3. Pivot the module downward until the rear 48-pin connector fully seats into the backplane bus socket and the lower tab latches firmly.
4. Connect serial field cables using shielded twisted-pair wire, ensuring cable shield conductors are bonded to the main enclosure earth bus at a single grounding point.
5. Apply power to the rack assembly and verify that the front-panel "Module OK" LED illuminates solid green to confirm normal backplane initialization.