Position switch, 3SE51 with rounded plunger (stainless steel), metal housing 40 mm according to DIN EN 50041 1NO/1NC snap contacts with M12 connector, 4-pin, fixed PIN assignment: PIN1=21, PIN2=22 PIN3=13, PIN4=14 Mechanical position switches SIRIUS 3SE5 for position and location detection of machine parts and position monitoring of protective devices. The modular design of the 3SE5 position switches enables a large number of variants with a small number of bearing types. The large variety of connectors and rollers meets almost all requirements in everyday industrial use. LEDs show the current status of the device. Thanks to quick connection technology, connection times can be significantly reduced. Switching points and fastening according to EN 50047 and EN 50041. The devices are approved worldwide (IEC, UL). With the appropriate switch configuration, the highest safety requirements according to PL e or SIL 3 can be met. The integrated ASIsafe electronics require a low power consumption. Various housing sizes are available, with different switching elements, in plastic or metal or compact design. Some variants are optionally available with LED status display and M12 connector. The 3SF1 series with direct connection to the AS-Interface bus system rounds off the portfolio. Depending on the version, drive heads and connectors as well as other mounting/connection accessories are available as accessories. Safety is a SIRIUS business.