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The IS200EPSMG1A is a GE EX2100 Exciter Power Supply Module. This board is responsible for converting the 125VDC voltage from the EPDM board into the various voltages required by the EX2100 Control System.



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  • Part Number: IS200EPSMG1A
  • Manufacturer: GE Industrial Systems
  • Series: EX2100 Excitation Control

IS200EPSMG1A Technical Specifications

Board Type Exciter Power Supply Module
Functional Acronym (Abbreviation) EPSM
Location Mount in the EPBP Backplane
Manual GEI-100462 or GEH-6632 (EX2100 Users Guide)
Manufacturer GE Industrial Systems, General Electric Company USA, GE Energy
Model Number IS200EPSMG1A
Series / Product Family EX2100 Excitation Control Exciter
Used With EPDM Module
Weight 1lbs 8oz

About the IS200EPSMG1A

Excitation Power Supply Model number IS200EPSMG1A is mounted in the EPBP backplane and provides logic level power to other controllers. In terms of power for the EPSM models, a power supply of 125 VDC is sent from the EPDM, after the power supply has been received the EPSM will generate the voltages into 5 VDC, 15 VDC, or 24 VDC. The power supplies for the M1, M2, and C controllers are located in the power supply module which is located underneath the control rack in the control cabinet. 

Power from the EPSM module is also sent to external modules. The twenty-four VDC power is supplied to the crowbar module, EDCF, EGDM, and EDEX de-excitation module. An isolated seventy VDC that is used for contact wetting is used for the ECTB and EXTB modules. As the IS200EPSMG1A module is an A version, this board is not backward compatible. 

The product-specific manual that is used with the IS200EPSMG1A board is GEI-100462. The series manual is the GEH-6632 and information about the EPSM board can be found on page fifty-three.

For compatibility between the other revisions, please reach out to AX Control or the manufacturer. This board, although discontinued, continues to be available through AX Control. Repair for this Exciter Power Supply Module is also an option. Please reach out with any questions.

Frequently Asked Questions about IS200EPSMG1A

The IS200EPSMG1A board is used in simplex control systems. How many boards are required?

Only one IS200EPSMG1A board is required, but this model can have both AC and DC supplies for increased reliability. 

How many EPSM models can mount in the EPBP backplane?

Up to three EPSM models can mount in the EPBP backplane to provide logic-level power to the controllers. 

On simplex exciter applications where will the EPSM board be mounted?

When the IS200EPSMG1A board is being used in simplex exciter applications the board will be mounted in the same control module that the control cards are mounted in. 

How does the IS200EPSMG1A model interface to the backplane?

When interfacing to the backplane the IS200EPSMG1A model will do so through DIN connectors. 

Reviews For IS200EPSMG1A

Internal Review

Although expensive to replace, the IS200EPSMG1A Exciter Power Supply Module is simple to install and not a complicated repair. Due to obsolescence, market availability is at times limited and repair may be necessary for a user's system - AX Control Tech Team

Repair Services For IS200EPSMG1A

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

Our highly skilled technicians can repair your IS200EPSMG1A. 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
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All Motors: 1 Year
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