Double channel,manual/automatic reset Plug-in terminal 3N/O and 1N/C Short self-test Redundant ... ,SR4P2A1B24N,SR4P3A1B24,SR4P2A1B24S,SR4P2A1Y,SR2P4A24The SR4P2A1B22 and SR4P2A1B24 are appropriate for E-stop Switch,Safety Gate.The SR4P2A1B24P is appropriate ... press or equipment.If periphery has strong electromagnetism noise source(for example transducer,high frequency machine and so on),the controller ...