EP1008-0022M12 socketPinFunctionWire color 1)1USbrown2-white3GNDSblue4Inputblack5-gray1) The core colors apply to M12 cables from Beckhoff: ZK2000-5xxx, ZK2000-6xxx, ZK2000-7xxxConnection examplesStatus LEDsEach M12 socket has a green LED. The LED lights up when a high level is detected at the digital input.Status LED on an M12 socket for EP1008-0022