GE 531X305NTBAPG1 is an NTB/3TB terminal board developed by GE under the EX2000 Excitation system. It is used to provide a variety of interfacing tools that are not included with the drive, such as serial and relay outputs, low-level analog I/O, encoders, and power supply.

The NTB/3TB terminal board is installed in the drive cabinet and connects to the drive control board, power supply board, and external equipment. It provides the following features:

• Regulated voltages of +5 V dc and 15 V dc, each with a 300 mA current capacity
• Unregulated dc 24 V, 500 mA current capacity
• 120 V ac, 0.5 A of current capacity
• Differential A-quad-B encoder interface with a marker channel
• 12 general-purpose control inputs (up to 24 V dc)
• Special-purpose digital inputs (such as RESET and CONTROL ON)
• Hardware jumpers to bias disconnected inputs to +24 or -24 V dc

The NTB/3TB terminal board is used in a variety of industrial applications, such as:

• Motor control
• Process control
• Power generation
• Robotics

It is compatible with GE EX2000 AC and DC drives