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3 year warranty

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The Input/Output Exciter Terminal Board IS200EXTBG3A is the third board of the EXTB models and is used as a redundant control and is used in breaker mode. The typical power supply of the EXTB board is typically 70 VDC in with the 41 pilot relay, and 53A and 53B flashing contactors.



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  • Part Number: IS200EXTBG3A
  • Manufacturer: GE Industrial Systems
  • Series: EX2100 Excitation Control

IS200EXTBG3A Technical Specifications

Alphanumeric Catalog Number IS200EXTBG3A
Board Control Mode Breaker Mode
Board Description Exciter Terminal Board
Board Number EXTB G3
Board Type Input/Output Terminal Board
Redundancy Type Redundant
Trip Relay 41T Used Yes

Product Description

Exciter Terminal Board IS200EXTBG3A is part of the EX2100 series of models. This board is one of the many input/output terminal boards and is used to control the protection functions and field flashing. This module supports signal conditioning, pilot relay contact outputs, and contact inputs. This is the third of four EXTB boards, this board is a redundant control and operates in breaker mode, this model is also the first of the four models to allow for the trip 41T relay to be used. 

The IS200EXTBG3A model is used alongside the EDEX model to help with the firing of de-excitation. The power supply of this model is sent through the M1, M2, or C controller and will be seventy volts of direct current (VDC) and this power supply is redundant. The EXTB board will either be used for controlling a contactor within the field circuit or controlling a field breaker in the field circuit. 

Board IS200EXTBG3A is used with two manuals, the product-specific manual GEI-100468 is used for installation and procedures, and the GEH-6632 manual is a series manual and lists the other parts that are used with this specific model. 

Frequently Asked Questions about IS200EXTBG3A

What is the difference between the EXTBG3 and EXTBG1 models?

The difference between the EXTBG3 and EXTBG1 models is the control mode and which relays are used. 

What signals are conditioned on the EXTB model?

Crowbar status and de-excitation signals from the EDEX model are the signals that are conditioned by the EXTB board. 

Does the IS200EXTBG3A model control any boards?

Yes, the IS200EXTBG3A model controls an EDEX board. The de-excitation needed for the EDEX board comes from the EXTB board. 

Are the EXHSG3 and the EXTBG3 boards the same?

Essentially, both boards are used to control other boards. They both operate in redundant mode and control the breaker field circuits. 

Reviews For IS200EXTBG3A

Internal Review

The IS200XTBG3A model is the third in a series of four EXTB models, this specific model is used as a redundancy control and is used in breaker mode. This model is not widely available and thus would immediately need to be replaced or repaired if any damage has been obtained which our team of specialists is able to do. - AX Control Tech Team

Repair Services For IS200EXTBG3A

Type Lead Time Price Action
Repair Service 1-2 weeks $1365

Our highly skilled technicians can repair your IS200EXTBG3A. 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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