I/O modules

The GE IS200VCRCH1BBC is a discrete input/output board designed for the Mark VI control system. It efficiently handles 48 discrete inputs and 24 relay outputs through four terminal boards, ensuring accurate and dependable signal processing in industrial environments. Its single-slot design saves space and simplifies installation, making it a strong choice for applications where compactness and reliability are essential.

Key Features

Efficient I/O Handling: The board manages 48 discrete inputs and 24 relay outputs with precision, improving system responsiveness.
Space-Saving Design: Its slim form factor fits neatly into a single slot of the VME I/O rack, reducing cabinet congestion.
Electrical Isolation: Optical isolators maintain signal integrity and enhance operator safety.
Fast Response: It provides consistent on/off response times within 25 milliseconds, ensuring timely control actions.
Voltage Compatibility: The module supports both 240 V AC and 125 V DC systems, allowing flexible deployment.
Durable Build: Relay contacts use silver cad-oxide material to ensure long-lasting performance under demanding conditions.

Functional Overview

The IS200VCRCH1BBC serves as a critical interface between field devices and the Mark VI control system. It receives input signals through optical isolators and immediately samples them for control logic or Sequence of Events (SOE) reporting. Moreover, it transmits all processed data via the VME backplane directly to the VCMI module for system coordination.

For SOE operations, the board samples inputs every 1 millisecond, which ensures precise and reliable event detection. Consequently, this feature enhances both fault analysis and system diagnostics.

Voltage Compatibility and Safety

When operating across mixed AC and DC environments, maintaining proper isolation is essential for long-term reliability.
Cross-connection risk: Avoid connecting 240 V AC and 125 V DC circuits together, as it may cause MOV (Metal Oxide Varistor) damage.
Failure mechanism: Excessive AC peak voltage beyond the MOV rating can lead to insulation breakdown.
Precaution: Always power down the rack before handling components, and follow grounding and labeling standards carefully.

In addition, performing a visual inspection after installation helps ensure all connectors are properly seated and wiring is secure.

Installation Guidelines

1. Power Off – Always shut down the VME I/O processor rack before installation.
2. Insert Board – Gently slide the IS200VCRCH1BBC into its designated slot, then engage both top and bottom levers.
3. Secure Connection – Tighten the captive screws on the front panel to secure the module.
4. Power Up – Restore system power and verify that diagnostic LEDs indicate normal operation.

Furthermore, ensure the board is installed in an environment within the recommended temperature range to prevent thermal stress and premature wear.

Technical Specifications

Details