Safety relay (standalone), inputs: Per pushbutton 1 N/O, 1 N/C, outputs: 2 N/O, 1 N/C, UB 24 V DC, width: 22.5 mm, screw terminals integrated, two-hand control relay, http://www.pilz.com simultaneity monitoring with two-hand pushbutton. Safety solutions provider since 2011, We offer Pilz