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General Electric 531X305NTBAJG1 NTB/3TB Terminal Board. The 531X305NTBAJG1 is installed in various DC300 drives and Mark V control systems.



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  • Part Number: 531X305NTBAJG1
  • Manufacturer: GE Boards & Turbine Control
  • Series: 531x Boards

531X305NTBAJG1 Technical Specifications

Model Number 531X305NTBAJG1
OEM GE Motors and Industrial Systems
Instruction Manual GEI-100020B (Supersedes GEI-100020A)
Product Type Terminal Board

Frequently Asked Questions about 531X305NTBAJG1

What is a 531X305NTBAJG1 Terminal Board?

The 531X305NTBAJG1 is a NTB/3TB Terminal Board that was manufactured by General Electric for DC300 and Mark V applications. The 531X305NTBAJG1 is specifically a "J" revision and will serve as a suitable replacement for any NTBA Terminal Board that uses backwards compatibility. 

What is the instruction manual for the 531X305NTBAJG1?

The GE Instruction Manual for the 531X305NTBAJG1 NTB/3TB Terminal Board is GEI-100020B and is available upon request from AX Control. 

What does the 531X305NTBAJG1 Interface with?

The 531X305NTBAJG1 NTB/3TB Terminal Board provides the following interfaces:
· Power supply
· Encoder
· RS-232C and RS422
· Relay Outputs
· Analog Tach and Reference coarse scaling
· Low-level analog I/O
· Digital control inputs

Product Description

The General Electric 531X305NTBAJG1 card was developed to function as an NTB/3TB terminal board. This card was manufactured with the 531X series of replacement drive and exciter boards. A number of critical device features are provided when this board is installed. Some of the interfacing capabilities of the card include relay and serial outputs, power supplies, encoders, and analog I/O.

A number of important features are provided to the host drive from the NTB/3TB terminal board. When installed, the 531X305NTBAJG1 card can produce regulated output supplies rated at 5 VDC and 15 VDC. Unregulated supplies of 24 VDC and 120 VAC are also produced by the board. Jumpers on the card also allow for interfacing configuration for 5 V and 15 V encoders. Within the board are seven relays that are either form C or form A output types. Each relay features a contact fating of 120 VAC. Four potentiometers are also found on the board. These allow for low level analog I/O scaling to occur.

Users are urged to review all installation parameters provided by the manufacturer before beginning board installation. Following these guidelines will help to prevent any accidental damages to the device. To ensure proper board use, only allow qualified personnel to handle and install the 531X305NTBAJG1 NTB/3TB terminal board. Technical support for this card was originally provided by the device manufacturer, General Electric.

Our trusted team at AX Control is happy to help with all of your automation needs. Please contact our sales staff by phone or email to receive pricing information for the 531X305NTBAJG1 board, or any other part or repair.

Repair Services For 531X305NTBAJG1

Type Lead Time Price Action
Repair Service 1-2 weeks $455

Our highly skilled technicians can repair your 531X305NTBAJG1. 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
Learn More