... SR4P3A1B24,SR4P2A1B24S,SR4P2A1Y,SR2P4A24The SR4P2A1B22 and SR4P2A1B24 are appropriate for E-stop Switch,Safety Gate.The SR4P2A1B24P is appropriate for ... appropriate for two-hands button.The SR4P2A1Y is appropriate for E-stop Switch,Safety Gate.The SR2P4A24 is appropriate for ... for example transducer,high frequency machine and so on),the controller should be far away from them to avoid the interference ...