Digital guide
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GE IS200VCRCH1A
- Product Name: GE Mark VI Discrete Input/Output VME Module (VCRC Board)
- Overview: A double-width VME module serving as the primary Contact Input/Relay Output (VCRC) interface in the GE Speedtronic Mark VI gas and steam turbine management platform. It acquires discrete contact signals and drives heavy-duty relay outputs for real-time turbine protection and control.
Detailed content
- Technical Specifications:
- Discrete Inputs: 48 dry contact inputs (optical isolation per channel)
- Discrete Outputs: 24 relay outputs
- Slot Width: Double-width VME module
- Sequence of Events (SOE): 1 ms time resolution
- Contact Chatter Filter: Minimum pulse width reporting down to 6 ms
- Input Signal Filtering: Hardware 4 ms filter for noise and contact bounce rejection
- Excitation Voltages: 125 V DC floating (with TBCIH1) or 24 V DC floating (with TBCIH2)
- AC Noise Rejection: 60 V RMS at 50/60 Hz with 125 V DC excitation
- Interface: Front panel J33 and J44 plugs; backplane P4, P5, P6 connectors
- Terminal Board Compatibility: TBCI (Contact Input) and TRLY/DRLY/SRLY (Relay Output)
- Operating Temperature: 0 to 60 °C (32 to 140 °F)
- Key Components: Over thirty transistors; resistors, capacitors, diodes; inductor beads; Xilinx Spartan XCS30 FPGA; IDT 7024S35JU0738P dual-port SRAM; three LED indicators (green RUN, red FAIL, orange Status).
- Functional Features: 48 optically isolated dry contact inputs; 24 heavy-duty relay outputs; 1 ms high-speed scanning for precision SOE data capture; hardware filtering for noise immunity; front-panel LED status indication.
- Applications: Gas and steam turbine management; real-time turbine protection loops; critical control data coordination for Mark VI platforms; retrofit and spare parts for legacy Mark VI installations.
- Installation Requirements: Isolate all hazardous voltages linked to the module; perform standard lock-out/tag-out (LOTO) procedures on incoming excitation power supplies; mount into VME I/O rack with J3/J4 cabling to terminal boards (TBCI and TRLY); ensure proper alignment of backplane connectors P4, P5, P6.
- Usage Notes: Because the Mark VI series is a mature legacy platform, secure this card as new surplus for buffer stock management; handle with ESD precautions; verify terminal board compatibility (TBCI for inputs, TRLY/DRLY/SRLY for outputs) before installation.
