GE IC687RCM711 – Series 90-70 PLC Redundancy Communications Module

In stock

Product Introduction:

The IC687RCM711, designed by General Electric (GE) Fanuc, is a high-speed redundancy communications module for the GE Series 90-70 PLC platform. It serves as the core communication link in hot standby (FIP) redundancy systems, enabling real-time synchronization between active and backup CPUs. By facilitating the exchange of shared I/O data and status messages, it ensures bumpless switchover and zero data loss during CPU failures or maintenance, making it essential for high-reliability industrial automation applications.

Technical Specifications

Manufacturer: General Electric (GE Fanuc)
Model: IC687RCM711
Series: GE Series 90-70 PLC System
Module Type: Redundancy Communications Module (RCM)
Compatibility: GE Series 90-70 CPUs (IC697CFR782, IC697CFR28); FIP single-rack redundancy systems
Communication Interface: High-speed parallel bus expansion; two onboard connectors (upper for bus transmitter module, lower reserved)
Data Transfer Rate: 500 Kbytes per second (effective data rate)
Synchronization Time: ≤1ms (real-time CPU synchronization)
Power Supply: 5V DC from PLC backplane; typical current consumption 1.2A
Dimensions (W×H×D): 115mm × 59mm × 40mm (single-slot VME width)
Weight: 0.2kg
Operating Temperature: 0°C to +60°C
Storage Temperature: -40°C to +85°C
Relative Humidity: 5%–95% (non-condensing)
Protection Class: IP20 (for enclosed control cabinet installation)
LED Indicators: Five green LEDs (BOARD OK, LOCAL RDY, LOCAL ACTV, REM RDY, REM ACTV) for module and redundancy system status
Manual Switch: Pushbutton for manual active/backup CPU switchover (1-second press; 10-second minimum interval between switches)

Key Features

Real-Time CPU Synchronization: Transfers synchronization messages and shared I/O data between active and backup CPUs, ensuring identical system states for instant failover.
Hot Standby Redundancy Support: Enables FIP single-rack redundancy configurations with two RCMs per system, eliminating downtime during CPU faults or maintenance.
High-Speed Parallel Bus: Delivers 500 Kbytes/sec data transfer for low-latency synchronization and I/O data sharing.
LED Diagnostic System: Five LEDs provide clear visibility into module health, local/remote CPU readiness, and active status for quick troubleshooting.
Manual Switchover Capability: Allows operators to manually transfer control from active to backup CPU (when backup is ready) for online maintenance of the primary unit.
Robust Industrial Design: IP20 protection, wide temperature tolerance, and ESD protection ensure reliable operation in harsh industrial environments.
Easy Integration: Single-slot VME form factor for seamless installation in Series 90-70 PLC racks; requires no external power (backplane-powered).