The ELS7 allows the surveillance of 7 speaker lines.
The system needs the addition of an End of Line element EFL7.
The Led on the PCB signals the normal operation of the speaker line and a closed dry contcat is opened in case of a Short or Open circuit.
A 10sec delay is introduced to avoid a non validated fault.
A jumper allows the configuration of a non used speaker line output and to isolate it from the general fault dry contact.
A general fault dry contact signals the good operation of all speaker lines.
Closed contact in normal operation. 24V DC to be supplied by an external power supply unit : Regulated and capable to sustain high inrush currents at startup.