The GE IS200ECTBG1ADA is an Exciter Contact Terminal Board (ECTB) used in the GE EX2100 excitation system, typically integrated with Mark VI turbine control systems.
It is designed to handle digital contact inputs and relay outputs, acting as a field interface for excitation system protection, interlocking, and control signaling.
In simple terms, it is a high-density relay and contact interface board that connects turbine/excitation control logic to external devices such as breakers, lockouts, and auxiliary contacts.
Technical Specifications
| Parameter | Specification |
|---|---|
| Module Type | Exciter Contact Terminal Board (ECTB) |
| Series | GE EX2100 / Mark VI |
| Function | Digital contact input/output interface |
| Input Type | Wet contact inputs (70 VDC supplied) |
| Output Type | Relay contact outputs (Form-C) |
| Trip Outputs | 2 lockout/trip relay outputs |
| Auxiliary Outputs | 4 general-purpose Form-C relays |
| Control Interface | EMIO board control |
| Redundancy Support | Yes (ECTBG1 redundant version) |
| Input Channels | 6 auxiliary contact inputs |
| Special Inputs | 52G and 86G monitored contacts |
| Supply Voltage | 70 VDC wetting supply |
| Mounting | EX2100 EPBP backplane |
| Communication | Hardwired + controller feedback via EMIO |
| Protection | Industrial isolation and monitoring |
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Physical Characteristics
| Item | Value |
|---|---|
| Dimensions | ~16 × 16 × 12 cm |
| Weight | ~0.8 kg |
| Construction | Industrial multilayer PCB |
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System Role
The IS200ECTBG1ADA acts as a control and protection interface layer in excitation systems:
- Handles trip and shutdown (lockout) signals
- Provides relay outputs for external devices
- Reads field contact inputs (breakers, permissives, alarms)
- Supplies 70 VDC wetting voltage to field contacts
- Interfaces with EMIO control board for logic execution
- Supports redundant voting logic in multi-controller systems
It is a signal switching and interlocking module, not a processor.
Key Functions
1. Trip & Lockout Control
- Provides 2 dedicated trip outputs
- Used for emergency shutdown or protection lockouts
2. Relay Output Control
- 4 Form-C relay outputs
- Controlled by EMIO logic system
3. Contact Input Monitoring
- Reads field status signals (breakers, permissives, alarms)
- Includes 52G and 86G protective contacts
4. Wetting Voltage Supply
- Provides 70 VDC excitation for field contacts
- Ensures reliable signal detection
