Yokogawa Psccm22Aan Ccm Critical Control Module 16418-531/1 Yokogawa Industrial Safety Systems Model No : Psccm22Aan Prosafe - Plc Ccm + Critical Control Module Power : 24Vdc== 0.60 A Max Comm.Signals : +/-15 Vdc == Rom Version : 3.03 P/N : 16418-531/1 Made In U.S.A