The GE IC695CMM002, also cataloged as the IC695CMM002 Serial Communications Module, operates as a dedicated hardware component for serial protocol processing and interface expansion within PACSystem RX3i backplane architectures.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IC695CMM002 |
| Brand | GE Fanuc Emerson |
| Origin | USA / Global Manufacturing |
| Weight | 0.34 kg (0.75 lbs) |
| Dimensions | Standard PACSystem RX3i Single-Slot Form Factor |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 0.7 A at 3.3 VDC, 0.115 A at 5 VDC |
| Series | PACSystem RX3i |
| Product Type | Serial Communications Module |
| Number of Ports | 2 isolated serial ports |
| Serial Protocols Supported | MODBUS Master, MODBUS Slave, CCM Slave, DNP3 Master, DNP3 Slave, Serial I/O |
| Physical Interface | RJ45 connectors |
| Selectable Baud Rates | 1200, 2400, 4800, 9600, 19.2K, 38.4K, 57.6K, 115.2K baud |
| Physical Signal Standards | RS232, RS422, RS485 (Software Configurable) |
| Data Framing | Parity: Even, Odd, None; Data Bits: 7, 8; Stop Bits: 1, 2 |
| Rack Density | Up to 6 modules per RX3i CPU rack |
| Isolation Rating | Port-to-Backplane/Ground: 250 VAC continuous, 1500 VAC for 1 min, 2550 VDC for 1 sec; Port-to-Port: 500 VDC continuous, 710 VDC for 1 min |
| Overvoltage Protection | +/-25 VDC maximum |
| Status LED Indicators | Module OK, Port Fault, Port 1 Status, Port 2 Status |
Backplane Bus Communication Velocity and System Integration
The IC695CMM002 exchanges control data across the PACSystem RX3i high-speed PCI backplane structure, transferring serial protocol buffers directly to the CPU execution memory with minimal backplane latency. Each of the two RJ45 serial interfaces maintains independent electrical isolation rated at 500 VDC port-to-port and 250 VAC continuous port-to-backplane, preventing ground loop currents from affecting backplane bus communication velocity and signal integrity.
Firmware flash compatibility allows field upgradeability of protocol engines. When running firmware version 1.32 or later managed via Machine Edition Release 5.90 SP1 SIM 6 or higher, half-duplex flow control can be established over RS485 lines. Operating alongside deterministic Ethernet networks, the module provides serial I/O density scaling up to six IC695CMM002 units per RX3i CPU system without degrading main rack power distribution margins.
Frequently Asked Questions
Q: What are the backplane power supply current draw requirements for the IC695CMM002?
A: The module draws a maximum of 0.7 A at 3.3 VDC and 0.115 A at 5.0 VDC from the RX3i backplane power supply.
Q: Can DNP3 protocol be mixed with MODBUS or Serial I/O on the same module?
A: No. When DNP3 Master or DNP3 Slave protocol is configured on either port, the remaining port on that same IC695CMM002 module can only be assigned to DNP3 Master or DNP3 Slave communication.
Q: What firmware and software versions are required to support half-duplex flow control on RS485?
A: Half-duplex flow control requires module firmware version 1.32 or later, configured via Machine Edition Release 5.90 SP1 SIM 6 or later.
Field Installation Guidelines
- Ensure main backplane power is disconnected before inserting or removing the module from the RX3i rack to prevent potential backplane interface degradation.
- Use shielded twisted-pair cables terminated with standard RJ45 connectors for all RS232, RS422, and RS485 communications to ensure noise immunity.
- Connect cable shielding directly to frame ground at a single termination point to prevent ground loops across isolated port boundaries.
- Maintain minimum 50 mm clearance around rack ventilation slots to ensure ambient operating temperatures remain between 0 and 60 deg C.
- Verify signal levels remain within the +/-25 VDC maximum overvoltage threshold to protect internal transceiver circuits.
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