FAQ No. FAQ02315
Question
What is a form lock mechanism?
Answer
Safety Limit Switches use inflexible
interlocking components, related to the direct opening mechanism (forcibly
opened contacts), so that the components will not distort or come apart
even if great force is applied to the Actuator by contact welding or other
cause.
The following diagram shows an example using a rotating shaft and lever.
Note 1: The lever cannot be mounted
backwards because the protrusion and notch interlock so that the lever
will not free-turn even if a large force is applied.
Note 2: The Safety Limit Switches with changeable roller levers do not
have the form lock mechanism.
Other Safety Limit Switch
FAQs
 What is a snap action?
What is the difference between Safety Limit Switches and General-purpose Limit Switches?
What is direct opening travel (DOT)?
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