"The SensaGuard Non-Contact Switch is PLe, SIL 3 and Cat 4 rated and is intended for use with sliding, hinge or lift-off machine guard doors. These safety switches are based on RFID (Radio Frequency IDentification) technology for coding and inductive technology for sensing. Combined with a large sensing range for optimum operation and tolerance to misalignment, these non-contact switches are a cost-effective solution to a wide range of industrial safety applications.No dedicated controller required for its RFID coding security. Switches can be connected in series with other devices (e.g. Light Curtains, E-stops, interlock switches). PLe, SIL 3, Cat 4 rating maintained with multiple units connected in series. Can be connected to standard safety relays, SmartGuards and safety I\/O blocks. They provide three different types of PNP output including one auxiliary PNP. Equipped with an LED to indicate the device status and any faults. IP69K environmental ratingSupply Voltage = 24 V dcHousing Material = PlasticRange = SensaguardTerminal Type = CableSeries = 440NIP Rating = IP69KActuator Included = YesSafety Category = 4Length = 67.06mmWidth = 18 (Dia.)mm"