Description
By installing the VA-EOL at the end of speaker lines and the SL-SENSOR2/SL-SENSOR4 on the zone board of a BTQ-VMD/SGD/SLD unit, the system can detect open or short circuits within 90 seconds, meeting EN54-16 requirements and reducing diagnostic time. No additional loopback cabling is needed, as the sensors are powered via the speaker line by the BTQ-VMD/SGD/SLD without affecting the audio signal. For sensitive environments such as nurseries, where the 20 kHz monitoring tone may disturb babies, BLK-60 or BLK-200 filters can be installed to suppress the tone.