ConnectorsNoteRisk of confusion: supply voltages and EtherCATDefect possible through incorrect insertion.Observe the color coding of the connectors: black: Supply voltages green: EtherCATM8 connectorContactFunctionDescriptionCore color 1)1USControl voltageBrown2UPPeripheral voltageWhite3GNDGNDBlue4GNDGNDBlack1) The core colors apply to cables of the type: Beckhoff ZK2020-3xxx-xxxx