IS200TBCIH1B | General Electric | Contact Input Terminal Board

GE IS200TBCIH1B Contact Input Terminal Board

The GE IS200TBCIH1B, also cataloged as the IS200TBCIH1B contact‑input terminal board, serves as a group‑isolated dry‑contact interface for 24 channels across Mark VIe distributed control platforms. Each input is conditioned through surge‑suppression and high‑frequency filtering before being routed to optical isolation stages in the associated I/O processor.

Hardware Specifications

Profinet / EtherNet/IP Deterministic Networks

Although TBCI is a passive terminal board, its discrete‑signal routing aligns with deterministic scan cycles executed by VCCC/VCRC processors. The floating 125 V dc supply is current‑limited upstream in the PDM, ensuring stable threshold behavior across all channels. Optical isolators enforce group isolation, with reference‑voltage tracking clamped at 13% of nominal supply to force open‑contact interpretation under low‑voltage conditions. I/O density scaling remains consistent across H1/H2/H3 variants, with voltage ranges adjusted per specification.

Frequently Asked Questions

Q: Can IS200TBCIH1B be replaced while the cabinet is energized? A: No. The board must be replaced only when the associated control segment is de‑energized to avoid undefined discrete‑input states.

Q: Does the board include any jumper or hardware configuration settings? A: No. TBCI has no jumpers; all behavior is fixed by design and upstream supply characteristics.

Q: Why do the last three inputs use higher current loading? A: The 10 mA loading supports interfacing with external solid‑state output devices that require higher wetting current.

Field Installation Guidelines

• Mount the board on its designated carrier within the Mark VIe cabinet.
• Use proper torque on barrier‑type terminal blocks to ensure stable dry‑contact wiring.
• Maintain polarity: one terminal provides the positive dc source, the other returns to the board.
• Segregate wiring for high‑frequency noise sources; route contact wiring away from power conductors.
• Verify the floating 125 V dc supply is within the 100–145 V dc range before energizing.
• After installation, validate discrete‑input transitions through the controller diagnostic interface.