GE IC697RCM711

Product Name: Redundancy Communications Module (RCM)
Product Introduction: The GE IC697RCM711​ is a Series 90-70 PLC​ platform module designed to establish a high-speed parallel communication link between primary and secondary (backup) CPUs in Hot Standby​ or Enhanced Hot Standby​ redundancy configurations. It ensures seamless data synchronization and automatic failover to prevent process interruption.
Category:
Description
Technical Specifications:
  • Data Rate: 500 KB/s (parallel differential)
  • Maximum Cable Length: 15 m (using IC697CBLxxx series cables)
  • Backplane Current: 0.7 A @ 5 VDC (typical), 1.2 A max
  • Operating Temperature: 0 °C to +60 °C
  • Ports: 2 (Top active, Bottom reserved)
  • Compatible CPUs: IC697CPU780, IC697CGR772, IC697CGR935
  • MTBF: >100,000 hours @ 25 °C
    Function Features:
  • Five LED Status Indicators: Board OK, Local Ready, Local Active, Remote Ready, Remote Active
  • Manual Switchover Pushbutton: Requires 1-second press; 10-second lockout to prevent accidental activation
  • Non-isolated differential communication​ for high noise immunity in EMI-heavy environments
    Installation Requirements:
  • Slot Requirement: Single slot in rack positions 2–9 (must be in Rack 0 for redundancy)
  • No empty slot permitted between RCM and CPU in the rack
  • Connects via I/O cable to the last rack or Bus Transmitter Module of the secondary PLC
    Applications: Gas/steam turbine control, power generation protection systems, critical process automation where CPU redundancy is mandatory.
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