GE IS200VCRCH1B Contact Input/Relay Output Board
Delivery time 3 days
Product origin New/used
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The GE IS200VCRCH1B is the core dry contact input/relay output board of the Mark
The GE IS200VCRCH1B is the core dry contact input/relay output board of the Mark VI Speedtronic gas/steam turbine control system. Designed for high-reliability industrial control scenarios, it acquires external switching signals and drives actuators, serving as a critical I/O interface for turbine control, ESD, and valve/pump control.
Core Positioning and Functions
As the standard VME bus I/O board for the Mark VI system, it achieves electrical isolation and signal conversion for external dry contact signal acquisition and relay control output.
Input Side: Receives 48 dry contact/passive switch signals (such as valve position, pressure switch, emergency stop button), which are then sent to the system after optocoupler isolation.
Output Side: Drives 24 relay outputs for controlling actuators such as solenoid valves, contactors, indicator lights, and alarm circuits.
It features channel-level electrical isolation (1500 V DC), fault diagnosis, and SOE (Sequence of Events) capabilities, meeting SIL-level safety requirements.
Supports hot-swapping, allowing for online replacement without interrupting system operation.
Key Technical Parameters
Model: IS200VCRCH1B (VCRC Series, Single-Slot VME Board)
Applicable System: GE Mark VI Speedtronic Marine Engineering Control System
Inputs: 48 dry contact inputs (passive contacts, supports 24 V DC excitation)
Outputs: 24 relay outputs (single-pole single-throw / double-pole single-throw, contact capacity: 250 V AC / 30 V DC, 0.5–2 A)
Isolation: 1500 V DC electrical isolation between input/output channels
Interface: VME bus, front panel J3/J4 connects to TBCI (input terminal block) and TRLY (output terminal block)
Operating Temperature: -40°C to +70°C (industrial wide temperature range)
Protection: Conformal coating, suitable for harsh environments such as power plants and offshore platforms
System Integration and Wiring
Installation: Single-slot VME I/O rack, no daughterboard required (compared to...) (VCCC saves more space).
Input Wiring: The first 24 channels connect to the TBCI terminal block, and the last 24 channels connect to a second TBCI, providing 24V DC external excitation.
Output Wiring: 24 relays connect to the load via the TRLY terminal block, supporting normally open/normally closed configurations.
Compatible Modules: Works with turbine control boards such as IS200VTURH2B and IS200TTURH2B.
Application Scenarios
Gas/Steam Turbine Control: Valve position feedback, start/stop interlock, overspeed protection, vibration alarm.
Power Plant ESD/Emergency Shutdown: Emergency stop button, flame detection, pressure/temperature over-limit interlock output.
Petrochemical Industry: Pump/compressor start/stop, valve control, safety loop drive.
Industrial Process Control: Switch signal acquisition, alarm output, equipment status monitoring.
Maintenance and Replacement Points
Before Replacement: Ensure the system is in safe mode, disconnect the external excitation power supply, and avoid hot-plugging.
Diagnostics: Monitor channel status using front panel LEDs and Mark VI software to locate the faulty channel.
Compatibility: Only GE original or certified replacement parts must be used, ensuring contact capacity and isolation voltage match the system.
Lifespan: Relay contact lifespan is approximately 10^6 cycles. For frequent operation scenarios, contact status should be checked periodically.
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