Safety relay (standalone), inputs: 1/2-channel wiring with/without detection of shorts across contacts, outputs: 2 N/O, UB =230 V AC/24 V DC, width: 45 mm,screw terminals integrated, monitoring of E-STOP, safety gates, pressure-sensitive mats (to short circuit principle),feedback loop. http://www.pilz.com Safety solutions provider since 2011, We offer Pilz