The General Electric 531X187VCTABG1 is a voltage to current transducer card. This two channel board was developed for the 531X series of drive boards. It was designed to operate in Drives Products Operation adjustable drives, including AC-300, DC-300, and AC-500 series drives. Other members of the Drives Products Operation family can operate with this card installed. When installed, the transducer on the board can be used as either a voltage to isolated current or a voltage to isolated voltage.