BUS phase monitor for MERLIN systems for monitoring the normal mains supply
DNÜ-MB is a BUS phase monitor, which is used to monitor the normal mains supply.
Each DNÜ-MB is connected to a Gessler LPS/CPS system via a BUS cable. A unique BUS address is assigned to each DNÜ-MB by means of a rotary coder. A location text can be assigned at any time (to enable accurately targeted correction of a local fault in the normal mains supply.
As soon as one of the normal mains supply phases to be monitored falls below the nominal voltage by more than 15 %, the BUS phase monitor signals a local mains failure. The LPS/CPS system now switches on the emergency lighting off the area concerned and supplies the luminaires via the mains.