4E-EOL/10

Module to monitor the status of the loudspeaker line. It is connected in parallel on the last loudspeaker in the line and emits a non-audible 20kHz tone that is used to detect anything from an impedance change to a short or open line. Prevents any connection error and impedance variation on the line due to aging of the installation and weather conditions. It also incorporates a thermal fuse that reduces the risk of a short circuit in the event of a fire: at 135ºC it burns and causes an open circuit error on the line. Supplied in sets of 10 units.