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3.1 Operating principle SMLC1
The SMC system is capable of identifying any possible first failure the moment it
occurs and switching off the downstream relays. Failure to detect a fault is
therefore impossible.
As further dynamic monitoring, the periodic overall test of the device takes place
every 2 minutes for one second as a fully automatic process. The yellow LED
"TEST" shows that the test is being carried out followed by confirmation by the
red LED "FAULT" lighting up briefly.
Because of this special first failure safe design manual tests are not necessary so
there are no test switches on the SMLC1.
Electrode
6
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