IC695CMM002 Communication Modules GE PACSystems RX3i

The GE IC695CMM002 serves as the primary IC695CMM002 Serial Communication Module utilized to execute asynchronous data transmission across PACSystems RX3i platforms. The hardware processes serial protocols via independent isolated interfaces, converting physical data layers into backplane-compatible signal streams mapped directly onto the controller register database.

Hardware Specifications

Deterministic Networks and I/O Density Scaling

This interface block mounts directly into the RX3i PCI backplane bus structure, allowing communication sequences to synchronize with the main CPU execution cycles without inducing bus latency. It integrates with deterministic networks by mapping Modbus registers directly to internal controller memory. The hardware configuration enables I/O density scaling by expanding serial data links to distributed remote drops, gas analyzers, and power meters. Operating parameters and hardware handshake lines are allocated completely through the control software environment, relying on onboard firmware flash compatibility to facilitate online logic adaptations while preventing transmission drift across dense serial networks.

Frequently Asked Questions

Q: Does the IC695CMM002 support active hot-swap insertion and extraction within an energized RX3i chassis?

A: Yes. The PACSystems RX3i backplane hardware allows hot-swap operations for this module. The operator must actuate the upper and lower mechanical latches smoothly to prevent localized contact bounce from introducing transient errors on adjacent active communication cards.

Q: How is galvanic protection maintained between the serial channels?

A: The module architecture incorporates 500 VDC galvanic isolation that physically isolates port 1 from port 2, as well as both ports from the backplane logic. This design suppresses ground loop currents and protects the CPU from transient surges on the long field serial loops.

Q: Can both serial ports be configured for different communication protocols concurrently?

A: Yes. Port 1 and port 2 feature completely independent internal communication controllers. They can run separate protocols, baud rates, parity schemes, and electrical configurations (e.g., Port 1 running RS232 Modbus Master and Port 2 running RS485 DNP3 Slave) without resource conflicts.

Field Installation Guidelines

• Chassis Slot Mechanical Seating: Guide the module card edge into the alignment rails of any RX3i universal slot. Apply firm perpendicular force until the rear PCI connector seats completely into the backplane, and verify that the module retention clips engage the chassis frame.
• Shield Grounding and Drain Wires: Connect the serial cable shield drain wires to the grounding lugs provided on the terminal assembly or the main enclosure earth ground bar. Do not leave the shield floating on both ends of the transmission path.
• Termination Resistor Setup: When implementing an RS485 multi-drop network over long distances, ensure that external 120 Ohm termination resistors are installed across the TX/RX data pairs at the extreme physical ends of the trunk line to eliminate signal reflections.
• Separation of Conduits: Route all low-voltage serial data cables through dedicated wireways separate from 120/230 VAC power distribution lines to maintain maximum signal-to-noise margins.