GE IS200ECTBG2A-DE — Overview

GE IS200ECTBG2A-DE is an Exciter Contact Terminal Board (ECTB) used in the EX2100 excitation control system for turbine-generator applications. It provides the interface for contact inputs and relay outputs between the excitation control and external field devices.

Product description

The IS200ECTBG2A board belongs to GE’s EX2100 series and is designed specifically for simplex (single-controller) configurations rather than redundant setups.

Its primary role is to manage, power, and monitor contact signals used in generator excitation systems, ensuring reliable trip, lockout, and auxiliary contact handling.

Key functions

1) Excitation system contact interface

The board provides the physical interface for excitation system contact I/O and communicates with the EMIO board, which collects the signals and sends them to the controller.

Main I/O capabilities:

• 6 auxiliary contact inputs
• 2 trip contact outputs (lockout drivers)
• 4 Form-C relay outputs (general purpose)

2) Trip and relay control

The board includes relay drivers used for generator protection and lockout circuits.

Trip relay outputs

• Two trip relays drive customer lockout systems
• Powered by 24 V DC from the controller

General-purpose relays

• Four Form-C relay outputs
• Used for external alarms, interlocks, or control logic

3) Contact monitoring and wetting voltage

The module provides 70 V DC wetting voltage to monitor the status of external contacts.

Monitored inputs include:

• Six auxiliary contacts
• Generator breaker 52G input
• Lockout relay 86G input

This ensures accurate status detection and reliable signal transmission.

Technical highlights

(Compiled from multiple vendor and technical sources)

How it fits in the EX2100 system

In a typical EX2100 architecture:

1. External contacts connect to ECTBG2A
2. Signals pass to the EMIO board
3. EMIO sends logic to the excitation controller
4. Controller drives excitation and protection actions

This makes the ECTB board a key field wiring interface for generator excitation control.

Typical applications

• Steam turbine generators
• Gas turbine generators
• Hydro generators
• Industrial power plants
• Utility power stations

Anywhere the GE EX2100 excitation system is installed.