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GE IS200TDBTH6ACD
What it is
The IS200TDBTH6ACD is a Discrete I/O Terminal Board (TDBT) that acts as the field wiring interface between turbine plant devices (sensors, switches, relays) and the GE control system.
It is commonly used in:
- Gas turbine control systems
- Steam turbine control systems
- Power generation Distributed Control Systems (DCS)
- Industrial automation / protection systems
Main function
- Terminates field wiring from contact inputs and relay outputs
- Provides signal isolation and conditioning
- Connects field devices to Mark VIe controller I/O packs (PDIO modules)
- Supports high-reliability (TMR – Triple Modular Redundancy) architectures in turbine protection systems
Key characteristics (typical for this model family)
- Discrete input/output terminal board
- Supports 24 group-isolated contact inputs
- Designed for 24V / 48V / 125V DC wetting voltage systems
- Can include relay output handling (depending on configuration)
- DIN-rail or cabinet mounting
- Industrial-grade noise immunity and surge protection
System role in Mark VIe
In a Mark VIe turbine control system:
- Field devices → connect to IS200TDBTH6ACD
- Board → routes signals to PDIO I/O packs
- I/O packs → communicate with controllers over Ethernet/IONet
- Controllers → execute turbine logic, sequencing, and protection
Where it is used
- Turbine start/stop logic
- Emergency shutdown (ESD) interfaces
- Valve position and interlock signals
- Auxiliary system status monitoring
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