Description
Note: Many products are not yet listed. Please contact us for more product information. Our supply channels are constantly expanding, and we currently have 20 stable shared supply channels. Please confirm the model, product, price, and all other necessary information with customer service before placing an order. We offer new, refurbished, and used products, and prices are adjusted according to the year of the item you require.
3. Product Introduction (Anti-Template)
Many Series 90-30 installations still rely on the Genius bus for distributed I/O and peer-to-peer data exchange. The IC693CMM302 (GCM+) is the enhanced communications module that handles automatic global data transfer between the PLC and up to 31 other Genius devices.
It occupies a single slot and can be placed in a CPU, expansion, or remote baseplate. Plants that standardized on Genius networking keep this module available because loss of the communications interface isolates the associated bus devices until a replacement is installed and the network is restored.
IC693CMM302
IC693CMM302
IC693CMM302
4. Key Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | IC693CMM302 |
| Description | Enhanced Genius Communications Module (GCM+) |
| Bus Devices Supported | Up to 31 per module |
| Global Data (Transmit) | 128 bytes |
| Global Data (Receive) | 128 bytes |
| Slot Width | Single slot |
| Compatible Baseplates | CPU, Expansion, and Remote |
| Backplane Current | < 300 mA at 5 VDC |
| Status LEDs | OK and COM |
| Modules per PLC | Up to 2 (typical practical limit) |
| Compatibility Note | Cannot be used in the same system as a standard GCM module |
5. Field Application & Technical Pitfalls (The Engineer’s Guide)
This module is used to exchange global data with Genius I/O blocks, other PLCs, and monitoring devices on a Genius bus. It supports data monitoring and peer-to-peer communications but does not control Genius I/O blocks itself.
Three pitfalls appear during replacement:
Bus termination and wiring – incorrect termination or damaged Genius bus cable is a common cause of COM LED faults after module replacement.
Configuration mismatch – the module must be properly configured in the PLC hardware configuration; an unconfigured or incorrectly addressed module will not exchange data.
GCM vs GCM+ conflict – a standard GCM and a GCM+ cannot coexist in the same Series 90-30 system.
One plant installed a replacement IC693CMM302 and saw intermittent COM LED blinking. The new module was healthy; a section of the Genius bus cable had marginal connections that only appeared under vibration. Reseating the connectors and verifying termination restored stable communication.
6. Quality Control (QC) SOP & Transparency
- Inbound Verification – OEM labeling, part number, and revision are photographed and checked against the packing list; any signs of prior field use are noted.
- Live Rig Testing – module is installed in a known-good Series 90-30 baseplate, powered, and verified for successful power-up diagnostics (OK LED).
- Parameter Testing – basic Genius bus communication is checked where a test network is available; status LED behavior is confirmed.
- Final QA & Packaging – unit is sealed in an anti-static bag with desiccant, fitted with a QC-passed label showing test date and technician ID, then double-boxed for shipment.
7. Frequently Asked Questions (FAQ)
What is the IC693CMM302?
It is the Enhanced Genius Communications Module (GCM+) for GE Fanuc Series 90-30 PLCs. It provides automatic global data communications on a Genius bus.
How many devices can it communicate with?
Up to 31 other devices on its Genius bus.
What is the global data size?
128 bytes transmit and 128 bytes receive.
Can it be used with a standard GCM module?
No. A GCM and a GCM+ cannot be installed in the same Series 90-30 system.
What warranty comes with a new-surplus unit?
Twelve months from shipment against defects in materials and workmanship when installed within the published ratings.
How do I confirm the module is healthy after installation?
Install the module, power up the system, verify the OK LED is on after diagnostics, confirm the COM LED is steady (indicating a healthy bus), and check that global data is exchanging correctly with the configured devices.
