The GE IS200EROCH1A Contact Input Terminal Board is a digital input interface module designed for GE’s Mark VI/Mark VIe Speedtronic turbine control systems, primarily used for signal termination and conditioning in industrial automation.
Below are its key functions and technical details:
1. Core Functions
Signal Termination & Isolation:
Provides terminal connections for dry-contact inputs (e.g., switches, relays) from field devices to the control system.
Ensures electrical isolation between field wiring and internal circuitry to prevent noise interference.
High-Speed Input Processing:
Supports 1 ms scanning rate for critical turbine variables (e.g., speed, vibration) with event sequence (SOE) recording.
Includes 4 ms filtering to suppress contact bounce and electrical noise.
System Integration:
Interfaces with VME-based I/O racks (e.g., VCRC modules) in Mark VI systems.
Compatible with 24V DC or 125V DC excitation voltage (configurable for TBCIH1/H2 variants).
2. Technical Specifications
Input Channels: 24–48 dry-contact inputs (expandable with secondary boards).
Isolation: Group isolation for noise immunity.
Power Supply: 24V DC (TBCIH2) or 125V DC (TBCIH1).
Operating Temp: -40°C to +85°C .
3. Applications
Turbine Control: Emergency shutdown (ESD), alarm monitoring, and interlock logic in gas/steam turbines.
Power Plants: Integration with Mark VIe DCS for real-time diagnostics.
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