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Safety Mats
The NSD Safety Mat System controllers contain two independent control circuits which allow for shut down due to any single failure in one of the control circuits. The N.O. output circuit is controlled by two captive contact relays in series which are both monitored. If the contact in one relay should stick closed (i.e., contact weld), the other relay will shut down and the LED will indicate the fault; if the contact on the bad relay opens back up, you must reset the power to clear the fault. This relay contact monitoring provides a high degree of user safety