The EMLS-3305 Speaker Line Supervisory Unit is part of the EMIX range of Supervisory equipments that monitors the condition of connected speakers. The main functionality of EMLS-3305 is to detect for any fault in the network of connected speakers by verifying for 'SHORT' and 'OPEN' condition in the 100V line.

The EMLS-3305 provides both visual indication of fault in the form of tri-color LED and audio indication in the form of buzzer sound. Fault condition can also be monitored remotely through a dry contact and a RS485 serial communication. Finally, the EMLS-3305 can be powered through the usual 24Vdc.