GE 531X305NTBAPG1 NTB/3TB Terminal Board

The GE 531X305NTBAPG1 is an NTB/3TB Terminal Board belonging to GE’s 531X series of replacement drive/exciter boards, specifically designed for the EX2000 excitation system, compatible with main CPUs, LAN Communication Cards, and programmer modules with keypads/displays. Its core role is to act as an interface between the EX2000 control core and external devices, enabling diverse functions: providing regulated and unregulated power supplies, configuring 5V/15V encoders via onboard jumpers, and offering seven relay outputs Form A/Form C, 120 VAC contact rating.

It also supports low-level analog I/O scaling via four potentiometers, features an RS-232C serial port, digital-to-analog outputs for testing, and auxiliary analog VCO inputs. Installation requires following GE’s parameters to avoid damage; it ships in anti-static packaging and it includes isolated/non-isolated circuits for exciter communication inputs.

Key Features
Dual Power Supply Output: Delivers both regulated (5 VDC, 15 VDC) and unregulated (24 VDC, 125 VAC) power, catering to diverse external device voltage needs in excitation systems.

Flexible Encoder & Relay Control: Onboard jumpers configure 5V/15V encoders, while seven Form A/Form C relays (120 VAC contacts) enable reliable switching for external circuits.

Analog Signal Tuning: Four potentiometers allow precise scaling of low-level analog I/O, ensuring compatibility with varying signal requirements of connected devices.

EX2000 Integration: Tailored for the EX2000 excitation system, supporting isolated/non-isolated exciter communication inputs and working with core components (CPU, LAN cards, programmer modules).

Communication & Testing Tools: Includes an RS-232C serial port for data transfer, plus D/A outputs and auxiliary VCO inputs to facilitate system testing and calibration.