GE IS200TBCIH1C Contact Input Terminal Board

Configured for discrete signal acquisition in Mark VI control platforms, the GE IS200TBCIH1C (IS200TBCIH1C Contact Input Terminal Board) provides direct physical/electrical execution of high-density dry contact monitoring.

Hardware Specifications

Backplane Bus Communication Velocity and Firmware Compatibility

The IS200TBCIH1C serves as a primary interface for dry contact inputs, facilitating connection to the VME rack via shielded cabling. The board integrates hardware-level noise suppression circuitry to protect against high-frequency transients and surges on the 24 input channels. Through deterministic backplane bus communication, the terminal board reports contact states to the VCCC or VCRC processor boards. It maintains firmware flash compatibility by mirroring the functional architecture of previous board revisions (TBCIH1B/2B), ensuring seamless integration within both simplex and triple modular redundancy (TMR) Mark VI system configurations.

Frequently Asked Questions

Q: Is this terminal board compatible with TMR configurations?

A: Yes, the IS200TBCIH1C is designed to support both simplex and TMR system architectures within the Mark VI control platform. It utilizes molded cable connections to maintain signal parity across redundant processor interfaces.

Q: What precautions should be taken regarding the 125 V DC wetting voltage?

A: The board requires an external 125 V DC source to excite the dry contact inputs. Ensure that the source is properly fused and that the wiring to the barrier-type terminal blocks is rated for the specified voltage to prevent insulation breakdown.

Field Installation Guidelines

1. Mounting: Ensure the terminal board is securely mounted within the cabinet. Verify that the grounding lugs are properly bonded to the cabinet chassis to maintain the efficacy of the onboard noise suppression circuits.
2. Wiring: Connect field dry contacts to the two barrier-type terminal blocks. Use shielded twisted-pair cabling to minimize induced noise, especially when signal runs are in proximity to high-voltage AC lines.
3. Cable Termination: Ensure the molded connectors interfacing with the VME rack are fully seated. Visually inspect pins for alignment before engagement to prevent damage to the backplane interface.
4. Maintenance: Periodically verify the tightness of the barrier-type terminal screws to prevent high-resistance connections. High-resistance joints in 125 V DC contact loops can generate localized heat and lead to intermittent signal status reporting.