Part No: 531X305NTBAPG1
Manufacturer: General Electric
Product Type: NTB/3TB Terminal Board
Series: EX2000

531X305NTBAPG1 NTB/3TB Terminal Board

531X305NTBAPG1 is an NTB/3TB Terminal Board developed by GE under the EX2000 Excitation system. The drive (or exciter) cabinet houses the 531X305NTB (NTB/3TB) board. The drive’s (or exciter’s) connection terminals for the majority of external signal-level I/O are located on the board, along with passive interface circuitry. Plugs 6PL and 8PL from the drive control board, plugs 2PL and 4PL from the power supply board, plug COMPL from the terminal board 3TB, and plugs 2PL and 4PL from external equipment connect to the NTB/3TB.

531X305NTBAPG1 Power Supply

For external use, the NTB/3TB provides the following power outputs:

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

Encoder Interface

A differential A-quad-B encoder interface with a marker channel is included in the NTB/3TB and can be used to connect to the drive.

On the drive control board, this circuit is optically isolated.

Jumpers are included in the NTB/3TB to allow the interface to be set up for +5 V or 15 V encoders.