The GE IS200VCRCH1BBC, also cataloged as the IS200VCRC Discrete I/O Terminal Board, operates as a dedicated hardware component for contact input processing and relay command distribution within Mark VI Speedtronic platforms. Configured as a single-slot VME module without a daughterboard, the unit receives field discrete signals and routes high-density relay output channels through front-panel J3 and J4 interconnects to preserve backplane bandwidth.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IS200VCRCH1BBC |
| Brand | General Electric |
| Origin | USA |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | VME Backplane powered |
| Series | Mark VI Speedtronic |
| Product Type | Discrete I/O Terminal Boards |
| Revisions | H1BBC (3 Revisions total) |
| Backwards Compatibility | Compatible with first two revisions |
| Integrated Circuits | FPGA, CMOS, Static RAM, Dual-port SRAM |
| Front Panel Interfaces | J33 and J44 cable connectors, Status/Fail/Run LEDs |
Backplane Bus Communication Velocity and Deterministic Networks
The IS200VCRCH1BBC interface maintains high backplane bus communication velocity across the Mark VI rack using integrated dual-port SRAM and static RAM architectures. Onboard FPGA logic handles direct signal state latching and parallel processing for discrete I/O density scaling without introducing processor interrupt delays. Dedicated front-panel connectors (J33 and J44) bypass auxiliary backplane routing for high-density relay triggers, ensuring firmware flash compatibility and deterministic scan timing across the control system.
Frequently Asked Questions
Q: How does the physical configuration of the IS200VCRCH1BBC differ from the VCCC module variant?
A: The IS200VCRCH1BBC operates without a daughterboard to occupy a single VME rack slot, requiring relay output connections to be cabled directly via front-panel ports rather than internal routing.
Q: What front-panel visual diagnostics are built into the board faceplate?
A: The single-slot faceplate contains three LED indicators: orange for Status, red for Fail, and green for Run.
Q: Is the IS200VCRCH1BBC revision level backward-compatible with older Mark VI installations?
A: Yes, the H1BBC revision configuration maintains hardware backward-compatibility with the first two production revisions of the VCRC circuit design.
Field Installation Guidelines
- Electrostatic Discharge Safety: Attach a grounded wrist strap to the frame enclosure prior to handling the circuit board to protect onboard CMOS and FPGA devices from ESD damage.
- VME Backplane Alignment: Slide the module evenly along the card guides until the two backplane connectors mate firmly with the VME rack plane, then tighten top and bottom retaining screws.
- Front Panel Cabling: Route field discrete wiring harnesses securely to J33 and J44 connectors without applying excessive tension to the faceplate jack screws.
- Thermal Envelope: Maintain unobstructed vertical airflow through the VME rack to ensure ambient temperatures inside the cabinet stay within standard operating limits.
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