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GE IS200VCRCH1B
Product Name: GE Mark VI Discrete Input / Relay Output Board (VCRC)
Product Introduction: The IS200VCRCH1B is a contact input and relay output board manufactured by General Electric as part of the Mark VI series. It provides discrete signal acquisition (dry contact inputs) and relay output control for turbine sequencing, protection logic interfacing and auxiliary system control in GE Mark VI systems.
Detailed content
Technical Specifications:
- Product family: GE Mark VI Turbine Control System
- Module type: VCRC / VCRCH board (single-width, narrower than the double-width VCCC)
- Channels: 48 discrete dry-contact inputs and 24 relay outputs
- Input voltage: 125 V DC (floating supply, 100–145 V DC)
- Input isolation: 1500 V
- Input filter: 4 ms for noise and contact bounce; AC voltage rejection 60 V RMS (50/60 Hz)
- Signal types: Digital/discrete inputs and relay-driven outputs (Form C contacts)
- Relay outputs: For actuators, solenoids, interlocks
- Communication: VME backplane + I/O networks
- Redundancy: Supports simplex and Triple Modular Redundant (TMR) architectures
- Operating temperature: 0 °C to 60 °C (some sources list -10 °C to 60 °C)
- Storage temperature: -40 °C to +85 °C
- Relative humidity: 5% to 95% non-condensing
- Dimensions: ≈ 260 × 188 × 21 mm
- Weight: ≈ 0.32 kg
Functional Features: Reads discrete field signals and drives relay outputs for turbine start/stop sequencing, interlocks, auxiliary equipment switching and breaker/relay interface. Diagnostic features include channel status monitoring, relay coil feedback, fault detection and board health LED indicators.
Application Scenarios: Gas turbine control, steam turbine control, generator control and industrial automation. Widely deployed on GE Frame 6, 7 and 9 series gas turbines and large steam turbine power plants; also used in oil & chemical plants for logic control of large compressor drives.
Installation Requirements: Power down the VME I/O processor rack before installation. Slide the board into the VME rack and seat the edge connectors; tighten captive screws on the front panel. For TMR applications, plugs JR1, JS1 and JT1 provide contact input voltages to the three VME board racks R, S and T.
Usage Notes: The board only handles signal interfacing; all logic is executed in the Mark VI controller modules. Final protection logic is handled by the controller and protection modules. This is an obsolete/legacy product.
