under the order

Basic switch for position switch 3SE51 Metal enclosure 40 mm according to EN 50041 with connector 6+PE according to EN 43651 with 2 LEDs, yellow/green 24 V DC 2 NC quick action contacts without actuator head and 1 NO for LED display Pin assignment: Pin1=21, Pin2=22 Pin3=31, Pin4=32, Pin5=13 LED green, Pin6=ground LED PE connected

Download instructions at Siemens

If you have additional questions contact the manager