Description
Section 3. Product Introduction
The GE IC693CMM302 is an Enhanced Genius Communications Module for Series 90-30 PLC systems. It provides automatic global data communications between a Series 90-30 PLC and up to seven additional devices on a Genius bus with expanded diagnostic features beyond the base IC693CMM301.
This unit differs from standard GCM by offering enhanced troubleshooting capabilities and extended firmware features. Rated for 32–140°F operating range with 256-bit data capacity. Supports remote rack installation in later revisions—verify with OEM datasheet.
Section 4. Key Technical Specifications
| Parameter | Value |
|---|---|
| Module Type | Enhanced Genius Communications Module (EGCM) |
| Product Line | Series 90-30 |
| Data Type | Global Data |
| Maximum Data Rate | 256 Bits (32 Bytes) |
| Bus Protocol | Token-Passing Peer-to-Peer |
| Maximum Devices | Up to 8 Series 90-30 PLCs (31 total devices on bus) |
| Cable Type | Twisted-Pair Shielded (daisy-chained) |
| Operating Temperature | 32–140°F (0–60°C) |
| Storage Temperature | -13–158°F (-25–70°C) |
| LEDs | 2 (OK, COM) |
| Weight | 1.00 lbs (0.45 kg) |
| Configuration | Software or Handheld Programmer (no DIP switches) |
| Remote Rack Support | Revision F and later (requires Upgrade Kit 44A286397-G03) |
GE IC693CMM302
Section 5. Quality Control Process
1. Incoming VerificationTrace source documentation and cross-check serial numbers against OEM records. Visual inspection for corrosion, impact damage, or connector wear on terminal block pins. Verify revision code matches system requirements.
2. Live Functional TestInstall in CPU baseplate Slot 2–10. Power-on and verify OK LED illuminates after diagnostics. Establish Genius bus handshake with second PLC; confirm COM LED steady-state. Run continuous global data exchange >24 hours with diagnostic monitoring.
3. Electrical Parameter TestMeasure backplane current draw at 5 VDC; verify within nominal range. Test insulation resistance between bus terminals and ground using 500 V Megger; must exceed 10 MΩ. Verify shield continuity on twisted-pair cable.
4. Firmware VerificationRead module revision via programming software (IC693CMM302D/E/F/G/H). Photograph front label for documentation. Confirm compatibility with host CPU firmware version—earlier modules may require upgrade kit for remote racks.
5. Final QC & PackagingSeal in anti-static bag with desiccant pack. Apply QC Passed label with date and technician initials. Double-box with foam inserts; terminal block requires protective cap.
Section 6. Replacement Pitfall Guide
❗ Firmware CompatibilityThe IC693CMM302 has revision-specific CPU and remote rack compatibility. Modules versions E and earlier cannot be installed in remote racks without upgrade kit 44A286397-G03. Verify your CPU firmware and rack type before ordering.
❗ Bus Configuration ConflictsGenius bus requires proper termination resistors at both ends. Enhanced modules ship without configuration; missing termination causes signal reflection errors. Document existing bus topology before swapping.
❗ Cable Distance LimitsMaximum cable run depends on baud rate and cable type. At 153.6 kbps, maximum distance is 7500 ft with 100-ohm twisted-pair shielded cable. Exceeding limits causes intermittent COM failures.
❗ Global Data MappingThis module supports 256 bits maximum across bus. Adding too many devices or oversized data maps causes buffer overflow errors. Calculate total global data requirements before expansion.
❗ Enhanced Diagnostic MisinterpretationEnhanced diagnostics provide more detailed fault codes but require compatible programming software versions. Older software may display fault codes incorrectly or not at all. Verify software version supports EGCM features.
Keep these in mind and you’ll cut 90% of rework time.
GE IC693CMM302
Section 7. Compatibility Matrix & Benchmarks
Compatibility Matrix
- IC693CMM302 → IC693CMM301 (base GCM) : Direct — Same form factor, enhanced features backward compatible
- IC693CMM302 → IC693CMM302F/G/H (later revisions) : Direct — Same function, verify CPU compatibility
- IC693CMM302 → IC693BEM331 (Genius Bus Controller) : Incompatible — Different module type, not direct replacement
- IC693CMM302 → IC697CMM302 (Series 90-70 EGCM) : Incompatible — Different product line
- IC693CMM302 → IC693CMM321 (Ethernet Module) : Incompatible — Different communication protocol
Benchmarks
- Global data exchange: 32 bytes (256 bits) per cycle
- Bus throughput: Up to 153.6 kbps (maximum baud rate)
- Token rotation time: 10–50 ms (typical 8-device configuration)
- Diagnostic refresh rate: 100 ms (enhanced vs. base module 500 ms)
- COM response time: <5 ms (module initialization after power-up)
