Description
The GE IS200TBAIH1C (and its revision variant IS200TBAIH1CED) is an Analog Input Terminal Board designed for the Mark VI turbine control system. This board serves as the primary physical interface between field-level analog instrumentation and the Mark VI controller rack. It is responsible for receiving, routing, and providing initial conditioning for signals from sensors like pressure transducers, thermocouples, and flow meters, ensuring these signals are safely and accurately transmitted to the I/O processor packs for further processing.
Key Technical Specifications
- Function: Terminates and distributes analog field inputs to the Mark VI system.
- System Compatibility: Designed for the Mark VI Distributed Control System (DCS).
- Signal Support: Supports various signal types including 4–20 mA current loops, voltage inputs, and thermocouple/RTD sensor inputs (depending on specific configuration and associated I/O pack).
- Connections: Features high-density screw terminals for secure field wiring.
- Processing Interface: Connects directly to the Mark VI I/O processor packs (such as the PAIC module) via standard ribbon or high-density cabling.
- Isolation: Provides necessary signal path routing with internal jumpers for configuration (e.g., current loop power options).
- Mounting: Designed for installation in the control cabinet alongside other Mark VI terminal boards.
- Diagnostic Capabilities: Facilitates point-to-point wiring checks and isolation for troubleshooting field loops.
- Durability: Robust construction to withstand industrial cabinet environments.
- Revisioning: The “CED” suffix indicates a specific hardware revision level, which may include enhanced shielding or connector layout improvements for better signal integrity.
Integration and Application
The TBAIH1C board acts as the central hub for field signals before they reach the electronic processing cards. Its role is critical for:
- Loop Powering: Providing regulated voltage to 2-wire or 4-wire transmitters.
- Noise Reduction: Maintaining signal integrity through proper terminal grounding and shielding techniques.
- Field Maintenance: Allowing technicians to disconnect specific loops for testing without disturbing the entire rack’s operation.
Related GE Mark VI System Components
To maintain a fully operational analog I/O loop, the TBAIH1C board is typically paired with the following:
- IS220PAIC: Analog Input I/O processor pack that mounts onto this terminal board.
- IS200DSPGH: Power distribution board providing the 24VDC loop power.
- Pressure Transmitters: Standard field instrumentation for monitoring turbine pressures.
- Thermocouple/RTD Sensors: Temperature monitoring devices for bearings and process flows.
- Shielding/Grounding Bar: Essential for managing electromagnetic interference on low-level analog signals.
- ToolboxST: The configuration software used to calibrate and scale the analog signals received via this board.
- Cable Assemblies: Pre-manufactured ribbon cables that connect the terminal board to the I/O pack.
- IS200TRLYH: Relay output board if combined signal and control loops are required.
- Mark VI Rack: The physical chassis housing all system modules.
- I/O Pack Cooling Fans: Essential for maintaining the longevity of the processor packs mounted on the terminal boards.
