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3 year warranty

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The GE Energy IS200EACFG3A AC Feedback Board is referenced in General Electric manuals and documentation as the abbreviation EACF and is part of the EX2100 Excitation Control System. The transformers used on this board support a nominal VRMS supply of 1.6.



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  • Part Number: IS200EACFG3A
  • Manufacturer: GE Industrial Systems
  • Series: EX2100 Excitation Control

IS200EACFG3A Technical Specifications

Abbreviation EACF
Manuals GEI-100465 and GEH-6632
Manufacturer GE Energy
On-board Connection Points RS232 - J504, J509, J514 & Terminals 1-4 at TB4
Part / Model Number IS200EACFG3A
Product Type AC Feedback Board
Series EX2100 Excitation Control System
Weight 2lbs 4oz

Product Description

The Exciter AC Feedback Board IS200EACFG3A is the final of the three G versions of the IS200EACF board. The G3 version of this module can handle an input voltage of up to 1300 VRMS. The transformers on this model typically supply a nominal of 1.6 VRMS. The IS20EACFG3A module has four voltage test rings labeled TP1, TP2, TP3, and TP4. Normally these four voltage rings are paired together and measure the phase voltage outputs; together TP1 and TP2 obtain the Line voltage AB, TP3 and TP4 obtain the Line voltage BC, and TP4 and TP1 obtain the Line voltage CA. 

The IS200EACFG3A model has three screw terminals, TB1, TB2, and TB3 all have different signals that they are used for, the three are each connected to potential phase transformers. TB1 is connected to PPT phase A, TB2 is connected to PPT phase B, and TB3 is connected to PPT phase C.

While this board is not widely available new, it can be found used. AX Control INC offers repair of the board and offers the next generation model that can be used as a replacement for the IS200EACFG3A board

Frequently Asked Questions about IS200EACFG3A

How does the G3 version of the EACF boards operate?

Version G3 of the IS200EACFG3A boards operates on a nominal range of 1300 VRMS compared to 480 VRMS for the G1 version and 1000 VRMS for the G2 version. 

What does each transformer/terminal on the IS200EACFG3A board indicate?

Transformers T1 through T4 are three-phase voltage transformers. The TB1, TB2, and TB3 terminals are used for voltage inputs, and terminal block TB4 is used for wiring from the Flux/Air coils. 

Is the IS200EACFG3A connected to any other boards within the EX2100 Series?

Yes, the IS200EACFG3A board is connected to the EMIO board which manages the I/O voltages. 

What is the best and easiest way to replace the IS200EACFG3A board if it no longer works?

Ensure that power to the auxiliary cabinet is completely off prior to beginning to remove the IS200EACFG3A board, once verified that the power is off carefully disconnect all of the cables; when removing cables be sure that they are all labeled to allow for quicker and easier reconnection when putting in the new board. Once the new board is received put it where the old board resided and start the power after all cables have been reconnected. 

Reviews For IS200EACFG3A

Internal Review

The downside of the IS200EACFG3A AC Feedback Board has little to do with the functionality of the board as it has a low failure rate, is easy to install, and is not a complicated repair. Instead, the problem with the IS200EACFG3A is that because so few were manufactured and because it is now discontinued, finding available market surplus is a struggle - AX Control Technician

Repair Services For IS200EACFG3A

Type Lead Time Price Action
Repair Service 1-2 weeks $1145

Our highly skilled technicians can repair your IS200EACFG3A. All of our repairs come with a 3 Year AX Control Warranty. Please contact us for additional information about our repair process. To receive the repair pricing and lead time listed above please process your repair order via our website. The following repair options may be available upon request:

  • 48-72hr Rush Repair
  • Detailed Repair Reports
  • AX Control Certificate of Warranty

AX Control Warranty Info

All products we sell are backed by our unparalleled warranty. A warranty certificate will be provided with your order upon request.
All PLCs, HMIs, and Turbine Control Boards: 3 Years
All AC/DC and Servo Drives: 2 Years
All Motors: 1 Year
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