Safety Guards

Category 3 and 4. Electrical Control Panels

– Category 3 circuits ensure the safety function, in the presence of a single fault, for example by employing two (redundant) channels, but a loss of the safety function can occur in the case of an accumulation of faults

–Category 4 circuits ensure that the safety function is always available even in the case of one or more faults, usually by employing both input and output redundancy, together with a feedback loop for continuous monitoring of the outputs

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