The General Electric IS200TBCIH2/C, also cataloged as the IS200TBCIH2 Discrete Simplex Terminal Board, operates as a dedicated hardware component for field-level discrete signal termination and primary turbine trip logic execution within Mark VI turbine control systems.

Suffix Breakdown & Model Matrix

The IS200TBCIH2/C follows the GE standardized hardware nomenclature. The "IS200" prefix identifies the component as part of the Mark VI series. The "TBCI" designator denotes the board function as a discrete terminal interface board. The "H2" identifies the specific hardware iteration, while the "/C" suffix indicates the board revision level, which defines compatibility with specific control firmware versions and field wiring terminal block layouts.

Hardware Specifications

Profinet / EtherNet/IP Deterministic Networks

The IS200TBCIH2/C is engineered to interface directly with the turbine control rack, facilitating the deterministic capture of discrete input signals. This board converts field-level digital states into a format readable by the backplane bus, maintaining signal synchronization across the network. The design ensures minimal latency in the propagation of primary trip signals, ensuring that trip state execution adheres to the millisecond-timing requirements of the turbine control architecture. Firmware parity is maintained between the board interface and the controller module to ensure deterministic throughput.

Frequently Asked Questions

Q: Does the IS200TBCIH2/C support hot-swapping under load?

A: No. The board must be removed from the terminal cabinet only after the associated control rack power supply has been isolated and the field terminal strips are confirmed to be in a de-energized state.

Q: What is the primary purpose of the terminal board in a simplex configuration?

A: This board is utilized for discrete input and output terminations in non-redundant (simplex) loops, providing physical bridging for field sensors or actuator command signals to the main processor modules.

Field Installation Guidelines

• DIN-Rail and Cabinet Mounting: The IS200TBCIH2/C must be mounted within a grounded, enclosed turbine control cabinet. Ensure all mounting screws are tightened to secure the board against vibration.
• Wiring Termination: Utilize shielded twisted-pair cabling for all discrete signal inputs to minimize noise coupling. Ensure cable shields are terminated to the designated earth ground bar within the cabinet, not the board signal common, to prevent ground loop formation.
• Signal Integrity: Verify that all field wiring connected to the terminal blocks is properly ferruled. Maintain a minimum separation distance of 50 mm between low-voltage signal cabling and any high-voltage AC power distribution wiring to prevent inductive interference.
• Inspection: Prior to power-up, verify that no loose wire strands exist at the terminal block interface to avoid potential short-circuiting of the discrete signal lines.