SIRIUS POSITION SWITCH, PLASTIC ENCLOSURE ACC. TO EN50041, 40MM DEVICE CONNECTION 1X(M20X1.5); 1NO/2NC SNAP-ACTION CONTACTS W. M12 CONNECTOR,4-POLE 2NC CONNECTED PIN ASSIGNMENT: PIN1=21, PIN2 =22, PIN3=31, PIN4=32 MAX.250V UND 4A, WITH TEFLON PLUNGER