SCALANCE accessories for communication modules. Power supply PS791-1PRO. Wide input range Fanless expansion Robust metal housing AC connection cable supplied. IE power M12 socket. Connection socket to connect SCALANCE W-700/X208PRO for 24 V voltage supply 4-pin, A-coded. Signalling contact M12 socket. Connection socket to connect SCALANCE X208PRO for signal contact 5-pin, B-coded