General Electric designed the 531X307LTBAJG1 as a local area network (LAN) terminal board. It is housed under the 531X family of replacement boards. Drives and exciters across the GE series can accept this card in its cabinet. An interface system between external devices and the controlling drive are provided when the card is installed. Peripheral devices such as interlocks, pushbuttons, and indicator lights can use the board as an interface.