Description

The General Electric IC697RCM711 is a Redundancy Communications Module (RCM) designed for the Series 90-70 PLC platform. This module facilitates high-speed synchronization between primary and backup CPUs in Hot Standby and Enhanced Hot Standby configurations. It provides a dedicated path for shared I/O data transfer and synchronization messaging, ensuring seamless takeover during fault conditions.

Features

• High-speed parallel bus expansion interface.
• Supports Hot Standby and Enhanced Hot Standby CPU redundancy configurations.
• Enables shared I/O data transfer and synchronization between redundant PLC units.
• Integrated manual pushbutton for active-to-backup unit switching.
• Five LED status indicators for board health and system control monitoring.
• Compatible with IC697CPU780, IC697CGR935, and IC697CGR772 CPUs.

Applications

• Oil & Gas Refineries: Critical safety and processing systems requiring high availability.
• Power Generation: Turbine, generator, and substation control automation.
• Chemical & Pharmaceutical: Batch control and safety-critical protection.
• Marine Power Systems: Digital bus management for propulsion and service systems.
• Pulp & Paper Mills: Coordinated machinery and large-scale process control.
• Automotive Assembly: High-speed assembly lines where process continuity is essential.

Technical Specifications

Installation Guidelines

• Ensure the PLC rack is powered down before inserting or removing the module to prevent electrical damage.
• The module is designed for installation in slots 2 through 9 of the CPU rack (Rack 0).
• Use appropriate shielded cabling (e.g., IC697CBL811 or IC697CBL826) for communication links to minimize EMI interference.
• Maintain proper grounding practices for the rack and communication shields.
• Handle the module using ESD-safe practices to protect internal circuitry.
• Ensure adequate ventilation around the rack to maintain operating temperatures within specified limits.

FAQs

What is the primary function of the IC697RCM711?

The module synchronizes active and backup CPUs in a redundant system, allowing for shared I/O data transfer and automatic failover in the event of a primary unit fault.

What CPUs are compatible with this module?

The IC697RCM711 is compatible with GE Series 90-70 CPUs including the IC697CPU780, IC697CGR935, and IC697CGR772.

How do I manually switch between redundant units?

The module features a physical pushbutton on the front panel that allows for a manual switch from the active unit to the backup unit.

What do the LED indicators signify?

The LEDs provide real-time status of the module health (Board OK) and the control status of the redundant system (Local/Remote Ready and Active states).