If you are wanting to control access to a machine or something other than a door, replace the door lock with a relay or if it is drawing less than 12V 3A you can put it straight onto the SNARC itself as the MoSFET and board will happily handle this much.When used in machine tools there is also a header on the board for the SNARC to allow the board to be wired in parallel with the E-stop (most prope