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Safety-related equipment

On the PNOZ x1, is there a test interval stated, in which the relay's safety function must be tested?

Safety relays in the PNOZ series, which includes the PNOZ X1 unit, have an internal hardware structure in which it is not necessary to run tests externally.

The unit performs a self-test each time it is switched on; no other tests are necessary due to the dual-channel internal structure.

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