... has several specification.They are SR4P2A1B22,SR4P2A1B24,SR4P2A1B24P,SR4P2A1B24N,SR4P3A1B24,SR4P2A1B24S,SR4P2A1Y,SR2P4A24The SR4P2A1B22 and SR4P2A1B24 are appropriate for ... SR4P2A1B24N is appropriate for safety light curtain(NPN).The SR4P3A1B24 is appropriate for E-stop Switch,Safety Gate.The ... ,facilitate installation and connection. Cat. 4 Safety Relay SR4P3A1B24 for emergency stop,safety gate
