The GE IS200TDBSH2AAA is a discrete I/O terminal board module used in the GE Speedtronic Mark VI turbine control system. It functions as a field interface between plant equipment (sensors, switches, actuators) and the Mark VI control processor, enabling reliable digital signal acquisition and output control.
In turbine and power plant systems, this module is essential for handling on/off signals such as trips, alarms, permissives, and actuator commands, ensuring safe and deterministic system behavior.
Technical Specifications
The IS200TDBSH2AAA is a rugged industrial I/O interface board designed for high-reliability control applications.
| Parameter | Specification |
|---|---|
| Module Type | Discrete I/O Terminal Board |
| Series | GE Speedtronic Mark VI |
| Function | Digital input/output signal interface |
| Input Channels | 16 discrete inputs |
| Output Channels | 16 discrete outputs |
| Signal Voltage Range | 10–30 VDC |
| Power Supply | 24 VDC nominal |
| Output Current | Up to 1 A per channel |
| Interface | Backplane connection to Mark VI controller |
| Wiring Interface | Terminal blocks for field wiring (TB1/TB2) |
| Isolation | Electrical isolation between field and control side |
| Diagnostics | Channel status monitoring via system diagnostics |
| Environmental Rating | Industrial-grade (-40°C to +85°C typical) |
| Protection | Conformal coating for harsh environments |
| Mounting | Rack-mounted terminal board |
This module is typically classified as a simplex discrete I/O board used in turbine control architectures.
Physical Dimensions & Weight
| Item | Value |
|---|---|
| Dimensions | ~160 × 160 × 120 mm |
| Weight | ~0.5–1.8 kg (varies by revision) |
System Role
The IS200TDBSH2AAA acts as a field signal interface layer:
- Reads digital inputs from field devices (switches, relays, sensors)
- Sends digital outputs to actuators, solenoids, and relays
- Transfers signal states to Mark VI controller via backplane
- Provides electrical isolation and noise filtering
- Ensures safe and reliable turbine protection logic execution
It is not a CPU or processor, despite some listings calling it a “processor module”—its real role is I/O signal interfacing.
Recommended Related Models
- IS200TDBSH2A – earlier revision of same I/O board
- IS200TDBSH6A – expanded discrete I/O terminal board
- IS200DSPXH1CAA – main DSP control processor
- IS200BICIH1ACA – bridge interface controller
- IS200BPIBG1AEB – power bridge interface module
