Limit switches detect mechanically reached end positions — paired with rollers, plungers or spring levers. Schmersal (safety interlock), SICK, Siemens, Pizzato and Pepperl+Fuchs lead Europe. Safety interlocks require PLd/e.
Limit Switch
Limit Switch
Limit switches detect mechanically reached end positions — paired with rollers or plungers. Schmersal, SICK, Siemens ...
Limit switches detect mechanically reached end positions — paired with rollers or plungers. Schmersal, SICK, Siemens and Pizzato lead Europe; safety interlocks require PL d/e.
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FAQ
Q Mechanical limit vs proximity?
A
Mechanical: direct contact, reliable in dust and oil mist, low cost, 1M switching cycles. Non-contact: unlimited life, fast, less sensitive to contamination. Heavy industry keeps mechanical.
Q Safety interlock PSEN?
A
Guard-door interlock (Schmersal AZM, Pilz PSEN sl) — door mechanically locked + electrical signal to F-PLC — prevents forced opening. EN 14119 is the core standard.
Q Ex-rated version?
A
ATEX Ex (Pepperl+Fuchs ZB, Schmersal Ex EX-AZ) mandatory in process and chemical zones — select EPL Ga/Gb/Gc per Zone 0/1/2.