General Electric IS230TDBTH6A Discrete Input Output Terminal Board

GE IS230TDBTH6A Discrete Input Output Terminal Board

The GE IS230TDBTH6A, also cataloged as the IS230TDBTH6A discrete I/O terminal board, serves as the primary TDBT assembly used to execute 24‑channel contact input processing and relay output interfacing across Mark VI Speedtronic TMR platforms.

Hardware Specifications

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As part of GE’s Mark VI Speedtronic architecture, the IS230TDBTH6A aligns with deterministic I/O acquisition cycles governed by the controller’s execution window. The board’s TMR rating enables fan‑out of contact inputs and relay outputs to three independent PDIO packs, maintaining synchronous timing across R/S/T control paths. Firmware flash compatibility resides entirely in the PDIO pack; the TDBT board contains no programmable logic. I/O density scaling is achieved through fixed hardware design—no jumpers or configurable elements—ensuring predictable mapping across legacy and upgraded Mark VI installations.

Frequently Asked Questions

Q: Where was the IS230TDBTH6A originally manufactured? A: The board was produced at GE’s Salem, Virginia manufacturing facility.

Q: Does the board support simplex operation? A: No. The IS230TDBTH6A is designed for TMR operation and provides triple fan‑out to PDIO packs.

Q: Are there any configurable jumpers on the board? A: No. The board is fully fixed‑configuration and contains no jumper‑selectable hardware.

Field Installation Guidelines

• Mount the board on a DIN rail or sheet‑metal carrier according to cabinet layout requirements.
• Maintain proper isolation between contact input wiring and high‑energy conductors to reduce surge coupling.
• Ensure TB1 and TB2 barrier‑type terminal blocks are fully seated before energizing the system.
• Terminate shields to the chassis‑mounted shield bar to minimize high‑frequency noise.
• Verify full seating of JE1, JW1, and JW2 connectors to maintain TMR synchronization.
• Follow GE installation manuals for torque values and grounding practices.