Description
Section 3. Product Introduction
The GE IC693CMM302P 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 31 additional devices on a Genius bus with expanded 128-byte data capacity beyond base IC693CMM301.
This unit differs from standard GCM by supporting larger data maps and multiple module installations per PLC. Rated for 32–140°F operating range with 128-byte transmit and receive capability. Supports up to two modules per controller for separate bus segments—verify with OEM datasheet.
Section 4. Key Technical Specifications
| Parameter | Value |
|---|---|
| Module Type | Enhanced Genius Communications Module (GCM+) |
| Product Line | Series 90-30 |
| Data Type | Global Data |
| Maximum Data Rate | 128 Bytes Transmit, 128 Bytes Receive |
| Bus Protocol | Token-Passing Peer-to-Peer |
| Maximum Devices | Up to 31 per module (62 with 2 modules) |
| 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) |
| Backplane Current | <300 mA @ 5 VDC |
| Modules per PLC | Up to 2 |
| Configuration | Software or Handheld Programmer (no DIP switches) |
| Supported Registers | %G, %I, %Q, %AI, %AQ, %R |
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 (Series P) 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 128-byte data mapping.
3. Electrical Parameter TestMeasure backplane current draw at 5 VDC; verify <300 mA 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 (IC693CMM302P). Confirm Logicmaster software version 3.5 or later required for operation. Verify compatibility with host CPU firmware—earlier software may not support full 128-byte data mapping.
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
❗ GCM Compatibility ConflictThe IC693CMM302P cannot coexist with standard GCM modules (IC693CMM301) in the same PLC. Mixing module types causes system initialization failure. Remove all GCM modules before installing GCM+—or vice versa.
❗ Software Version RequirementsEnhanced modules require Logicmaster software version 3.5 or later. Earlier software versions cannot configure 128-byte data maps properly. Verify your programming software version before deployment.
❗ 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 and data corruption.
❗ Dual Module ConfigurationUp to two GCM+ modules can be installed per PLC, each with its own Genius bus. Incorrect addressing causes bus contention between modules. Assign separate bus addresses and termination for each module.
❗ Register Mapping ComplexityEnhanced modules support multiple register types (%G, %I, %Q, %AI, %AQ, %R) with 128-byte capacity. Oversized data maps cause buffer overflow errors. Calculate total register requirements before configuration.
Keep these in mind and you’ll cut 90% of rework time.
GE IC693CMM302
Section 7. Compatibility Matrix & Benchmarks
Compatibility Matrix
- IC693CMM302P → IC693CMM301 (base GCM) : Incompatible — Cannot coexist in same PLC system
- IC693CMM302P → IC693CMM302P/Q (later revisions) : Direct — Same form factor, verify software compatibility
- IC693CMM302P → IC693BEM331 (Genius Bus Controller) : Incompatible — Different module type, not direct replacement
- IC693CMM302P → IC697CMM302 (Series 90-70 EGCM) : Incompatible — Different product line
- IC693CMM302P → IC693CMM321 (Ethernet Module) : Incompatible — Different communication protocol
Benchmarks
- Global data exchange: 128 bytes (1024 bits) per cycle
- Bus throughput: Up to 153.6 kbps (maximum baud rate)
- Token rotation time: 10–50 ms (typical 8-device configuration)
- Device capacity: 31 devices per module, 62 with dual module installation
- COM response time: <5 ms (module initialization after power-up)
