3SE6605-2BA01 - Siemens
Magnetically-operated switch, contact block, rectangular large 25 x 88 mm, contacts 1 NC/1 NO,plug M8, pin assignment: Pin1=21, Pin2=22 Pin3=13, Pin4=14. required solenoid 3SE6704-2BA or with increased operating distance 8 mm 3SE6701-2BA.