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Switches Categories

Safety switches are divided into tow functionally different categories corresponding to the definition of the German Employers’ Liability Insurance Association.

Switches Category 1 Switches Category 2

Switches where the switching element and actuator form on constructional and functional unit.

Switches where the contact element and actuator do not form a constructional unit, but are functionally combined or separated during actuation.

Functional characteristics
Safety function when the switch actuator is moved.
Functional characteristics
Safety function when the actuator is removed from the switch.

Application

  • Safety limit switches and proximity switches with trip dogs
  • Hinged door monitoring with cam plate actuation
  • Sliding covers and protective screens with trip dogs or for monitoring of protective covers.

Application

Safety switch without interlock:

  • In case with only rare or occasional intervention at dangerous locations, e.g. service covers, flaps, lift-out covers etc.

Safety switches with interlock:

  • Protective covers and guards for opening during operation in cases with dangerous machine rundown movements or continuing dangerous conditions.
 

Safety

General Information
Switches Categories
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