IS200EACFG2A 2 IS200EACFG2A 3 IS200EACFG2A 5 IS200EACFG2A 4

The GE IS200EACFG2A is an Exciter AC Feedback Board engineered for use within GE EX2100 excitation control systems and Mark VI turbine automation platforms. This module plays a critical role in AC feedback signal acquisition, converting high-voltage three-phase inputs into usable feedback for excitation regulators and control algorithms.

It is the G2 revision of the EACF series, providing expanded measurement capability and improved transformer support compared with earlier versions — making it a reliable choice for industrial power generation and exciter control systems.

Technical Specifications

Parameter	Specification
Model	IS200EACFG2A
Module Type	Exciter AC Feedback Board
System Compatibility	GE EX2100 / Mark VI Speedtronic Turbine Control
Board Revision	G2
Measured Voltage	Up to 1000 VRMS (Three-phase AC)
Voltage Input Transformers	Four phase-voltage transformers
Air Core / Flux Coil Inputs	Up to 0 – 0.8 VRMS (secondary CT output)
Phase Inputs	TB1 (Phase A), TB2 (Phase B), TB3 (Phase C)
Flux / Coil Inputs	TB4 with Coil 1/2 high/low terminals
Connectors	3 × DB9 sub-D for backplane connection
Function	AC voltage and flux feedback signal conditioning
Mounting	Rack or terminal board integration in exciter cabinet
Dimensions (H × W × D)	~263 mm × 58 mm × 28 mm (est.)
Weight	~0.40 kg (est.)

The IS200EACFG2A board converts high-voltage AC inputs (via potential transformers and flux/air-core coil inputs) into standardized feedback signals for the exciter regulator controller.

Recommended Related Modules

IS200EBKPG1B – Exciter Backplane Board
IS200EISBH1A – I/O Interface and Signal Board
IS200EMIOH1A – Main I/O Board
IS200EXAMG1A – Excitation Amplifier/Control Module
IS200EPSMG2A – Exciter Power Supply Module

These components together form a complete EX2100 turbine excitation control architecture, covering excitation power, feedback sensing, processor control, and I/O handling.

Popular GE Mark VI / EX2100 Modules

IS200DRLYH1B – Relay Output Terminal Board
IS200ERIOH1A – I/O Regulator Board
IS200BICIH1A – Bridge Interface Controller
IS200ACLEH1A/H1B – Application Control Layer Boards
IS200DSPXH1D – Digital Signal Processor Board

These modules frequently coexist in industrial turbine and power automation systems to support control logic, I/O, feedback, and protection functions.

Applications

The IS200EACFG2A is used primarily for:

AC exciter voltage feedback sensing in turbine excitation systems
Three-phase potential transformer voltage measurement for controller feedback loops
Flux coil / air-core CT signal conditioning
Real-time feedback to EX2100 or Mark VI regulator processors
Industrial power generation and turbine control systems

Its feedback signals are critical for accurate excitation regulation and stable generator output control.

Advantages

Expanded AC Measurement Range
Supports up to 1000 VRMS three-phase voltage measurement — suitable for high-voltage installations.

G2 Revision Enhancements
Additional transformers on the board provide comprehensive phase coverage and improved signal conditioning.

Precise Flux / Current Inputs
Air core coil inputs handle small secondary voltages (~0–0.8 VRMS), enabling accurate current/flux feedback.

Modular Integration
Standard sub-D connectors and terminal blocks ensure seamless integration with backplane and controller boards.

Industrial Reliability
Designed for operation within control cabinets under typical industrial temperature and vibration conditions.

Technical FAQs

What does the IS200EACFG2A board do?
It measures exciter AC voltage and flux signals and feeds conditioned signals to EX2100 or Mark VI control systems.
What voltage range can it handle?
Up to 1000 VRMS from three-phase potential transformers.
How many phase inputs are supported?
Three phase voltage inputs (Phase A, B, C) plus flux/coil inputs.
Where does this board install?
Typically within the exciter auxiliary cabinet’s control backplane.
Does it include transformers?
Yes — four transformers are integrated in the G2 version.
What are the flux coil inputs for?
They convert air-core CT or flux coil signals to usable feedback voltages.
Can it work with long cables?
Connections to the exciter backplane can extend up to ~90 m in some installations.
Is it specific to a system?
It’s designed for EX2100 and Mark VI turbine/excitation control families.
What connectors does it use?
Three DB9 sub-D connectors for backplane links plus terminal blocks.
Why is this board important?
Without accurate AC feedback, excitation control loops can’t maintain proper generator field current and voltage regulation.