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The GE IS200TDBTH4A board manages critical trip and contact logic for the Mark VI series. This relay board also carries the functional revision code IS200TDBTH4AAA . It switches high-current loads for turbine protection circuits. The board provides reliable electromechanical switching for auxiliary systems.
Technical Specifications of GE IS200TDBTH4A IS200TDBTH4AAA
| Parameter | Specification |
|---|---|
| Manufacturer | General Electric (GE) |
| Series | Mark VI Speedtronic |
| Full Model | GE IS200TDBTH4A (IS200TDBTH4AAA) |
| Board Dimensions | 26.04 cm x 24.13 cm x 2.54 cm |
| Weight | Approximately 0.85 kg |
| Control Voltage | 24 V DC (Nominal) |
| Relay Contact Rating | 10 A at 250 V AC / 30 V DC |
| Response Time | 45 ms (Max) |
Component Count and Relay Configuration
This GE IS200TDBTH4A board contains fifteen individual electromechanical relays. Each relay features silver alloy contacts for long switching life. The board also includes flyback diodes for inductive load protection. Moreover, you will find dozens of resistors and capacitors on the PCB.
Interfaces, Energy Storage, and Signal Paths
The IS200TDBTH4AAA revision provides terminal block connectors for field wiring. Furthermore, the board stores minimal energy due to its purely relay-based design. It uses small capacitors only for contact debouncing purposes. Consequently, this relay card does not require large energy storage devices.
Functional Logic and Application Context
This Mark VI board receives trip commands from the turbine protection module. It then energizes or de-energizes the output relays accordingly. Normally energized contacts provide fail-safe operation during power loss. Additionally, the GE IS200TDBTH4A monitors each relay coil for open circuit conditions. It reports any coil failure back to the main controller immediately.
Installation and Environmental Limits
You must isolate the 24 V DC supply before removing this board. The operating temperature range spans -30°C to +65°C . Furthermore, the board withstands 5 g vibration without contact chatter. Always verify wiring against the IS200TDBTH4AAA terminal diagram before power-up.