GE IS200VCRCH1BBC VCRC H1B Discrete Input/Output Board

The IS200VCRCH1BBC is a discrete input/output (I/O) board developed by General Electric (GE) as part of the Mark VI control system. This board, along with its daughterboard, manages 48 discrete inputs and controls 24 relay outputs, distributed across four terminal boards. It is designed for installation in a narrow single-slot configuration within the VME I/O rack, making it ideal for space-constrained environments.

Key Features and Functionality:

• Discrete Input/Output Management:
  Handles 48 discrete inputs and 24 relay outputs, connected through four terminal boards.
• VME I/O Rack Installation:
  Fits into a single-slot within the VME I/O rack, connected via J3/J4 plugs to the TBCI (Contact Input with Group Isolation) and TRLY (Trip Relay) terminal boards.
• Voltage Compatibility:
  Designed for use in systems operating with 240 V AC or 125 V DC power. Care must be taken to avoid cross-connections between AC and DC voltages, which could lead to Metal Oxide Varistor (MOV) failure if the peak voltage exceeds the MOV rating.

Voltage Compatibility Considerations:

• Cross-Connection Risk:
  Inadvertent connection between 240 V AC and 125 V DC can result in component failure, especially when AC peak voltage exceeds the MOV rating.
• Failure Mechanism:
  In AC systems with grounded neutral, unintended connections between AC and DC voltage apply a combined voltage to MOVs, potentially leading to failure. Systems operating at 120 V AC are less susceptible due to lower voltage.
• Safety Precautions:
  • Avoid cross-connections between AC and DC circuits.
  • Use proper labeling, insulation, and adhere to wiring best practices to maintain system reliability.

Installation Instructions:

1. Power Down:
   Ensure the VME I/O processor rack is powered off to prevent electrical hazards.
2. Board Insertion:
   Slide the DIO board into the appropriate slot within the VME I/O rack and use the top and bottom levers to securely seat the edge connectors.
3. Secure the Board:
   Tighten the captive screws on the front panel to secure the board within the rack.
4. Power On:
   Once the board is in place, restore power and verify the status of diagnostic lights to confirm the operational status of the board.

Operational Details:

• The board processes input signals by passing them through optical isolators, ensuring electrical isolation for safety.
• Input Sampling:
  Signals are sampled at specific frame rates for control purposes. For Sequence of Events (SOE) reporting, inputs are sampled at 1 millisecond intervals to capture real-time data.
• Signal Transmission:
  After sampling, the board transmits signals over the VME backplane to the VCMI, which forwards them to the controller for processing and decision-making.

Specifications:

• Part Number: IS200VCRCH1BBC
• Manufacturer: General Electric
• Country of Manufacture: USA
• Max Response Time On/Off: 25 ms
• Relay Contact Material: Silver cad-oxide
• Dimensions: 10.25 in x 0.782 in x 7.375 in
• Operating Temperature: -30°C to 65°C
• Product Type: Discrete Input/Output Board
• Series: Mark VI
• Availability: In Stock

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