Phoenix Contact 2702901 A safety relay with IO-Link capabilities is available for integration into emergency stop, safety doors, and light grids applications, offering up to SIL 3, Cat 4, PL e certification. It supports automatic or manual start operations, features two sensor circuits, monitored start functionality, and includes two enabling current paths. The device also has one signal output and comes with a plug-in screw terminal block for connecting to a power source of US = 24 V DC.