The rear of the A120 has the conector plug with a diagram of the pins, 3 & 4 are start stop; 12 & 14 are ok-to move; 6(+) & 5(-) divided arc voltage. I have the MIC-02; raw arc voltage card; thc sensor pwm; usb to rs485 high speed serial adapter from CandCNC. I'm not sure if i even need the RAV card now or what I really need to install/ hookup. If anyone has set up an A120, I need some help please. The A120 also came with a conector with a cord not sure what this is for and the clip that goes on the torch head. Thanks, Tim