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The IS200ECTXG1A board was manufactured by General Electric as part of the EX2100e system. This board is an Exciter CT Expansion board. The IS200ECTXG1A model is used with a number of different Thyristor systems, such as a seventy-seven-millimeter Thyristor system.



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  • Part Number: IS200ECTXG1A
  • Manufacturer: GE Industrial Systems
  • Series: EX2100e Excitation Control

IS200ECTXG1A Technical Specifications

Board Number IS200ECTXG1A
Series EX2100e
Manufacturer GE Industrial Systems, General Electric Company US
Manual GEA-S1302A EX2100e Excitation Control Manual
Functional Acronym/Abbreviation ECTX
Board Type Exciter CT Expansion Board
Storage Temperature -40 to +70 °C
Thyristor Systems 100, 77, 53, and 42 mm

Product Description

The IS200ECTXG1A model was designed as part of the EX2100e Series of devices. The ECTX model is an Exciter Current Transformer Expansion (ECTX) board that connects with an EX2100e System Interface Board (ESYS). The ECTX model is a daughterboard to the ESYS model and will mount directly on the ESYS motherboard. This model is a Digital Controller and will be connected to a Thyristor system. This model will typically operate on a power supply of 28 VDC. 

This model can support a variety of Ethernet local area networks (LAN) communications, such as GE OnSite support, which is used for diagnostics and monitoring, as well as Customer DCS through Modbus remote terminal units. 

The IS200ECTXG1A model contains a single isolation current transformer; the purpose of this transformer is to measure generator currents. There is an option for a third CT interface between the EX2100e static excitation controller and the customer generator. 

When using the IS200ECTXG1A module and a full set of three current transformers are being used, the ECTX features can supply the CTs to provide EX2100e interfacing to all of the available CTs on the board. As previously mentioned, the ECTX board can be mounted on the ESYS board, and when done, a third CT input can be connected from phase B on the ECTX model. 

A part-specific manual labeled as the GEI-100775 can be used when operating and installing the IS200ECTXG1A model, but it can be extremely difficult to find online. You can find information regarding this model in the GEH-6781 EX2100e Excitation Control User’s Guide. 

Frequently Asked Questions about IS200ECTXG1A

What kind of model is the IS200ECTXG1A?

The IS200ECTXG1A module is an Exciter Current Transformer Expansion (ECTX) board. The ECTX model is an optional daughterboard used with the ESYS board in the EX2100 system. This model has a singular isolation current transformer used for aiding in generator current measurements and can provide an optional third current transformer interface between the EX2100e static excitation controller and a customer-generator CT. 

What system can the IS200ECTXG1A be used with?

The IS200ECTXG1A board can be used in redundant or simplex EX2100 or EX2100e systems. 

Reviews For IS200ECTXG1A

Internal Review

The IS200ECTXG1A model can supply three current transformer applications, but if doing so needs the proper power supply, to do so, please ensure that when operating this model, you are using the correct power sources, anything less than required could result in an error. For more information regarding the required power sources refer to General Electric documentation. - AX Control Tech

Repair Services For IS200ECTXG1A

Type Lead Time Price Action
Repair Service 1-2 weeks $1990

Our highly skilled technicians can repair your IS200ECTXG1A. 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

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