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© 2019, ATEÏS, member of PAX ProAV Group
2.6.6
VA-DLC dummy load capacitor module
The VA-DLC dummy load capacitor is used for the
speaker line surveillance based on impedance
measurement. When a number of speakers are
installed with long wires, the VA-DLC can provide a
reliable monitoring method to detect the open circuit
of entire speaker line even the last speaker.
The VA-DLC has a 4-step DIP switch, and each step
refers to individual speaker line power load.
See
VA-DLC installation & connection
.
2.6.7
VA-EOL end of SP-line module for multi-branch/3-wire
To monitor the long speaker lines, the VA-DLC-100/VA-DLC-70 dummy load capacitor module can
be added on the PA/VA system to detect the open and short circuit of entire speaker line even the
last speaker. However, for advanced configuration such as install the VAT volume attenuators in the
3 wire speaker line for volume control, the impedance of speaker line is changed after adjusting the
volume on VAT volume attenuators. Furthermore, for branching the speaker line wiring, a cut of
partial branching may not change the overall impedance that obviously. Therefore, the VA-EOL is the
only solution which can adapt the changing impedance and detect open or short circuit for each
branch.
By installing the VA-EOL at the end of speaker lines, the system can indicate which speaker line is
open or short circuit, helping to save the analysis time. In addition, the installation does not require
additional loopback cabling and is powered by BTQ-VM/SG/SL via speaker line without affecting the
audio signal.
See
VA-EOL installation & connection
2.6.8
SL-SENSOR2/SL-SENSOR4
SL-SENSOR2
SL-SENSOR4
By installing the VA-EOL at the end of speaker lines and SL-SENSOR2/SL-SENSOR4 on the zone
board of BTQ-VM/SG/SL unit, the system can indicate whether speaker line is open or short circuit
within 90 seconds (EN54-16 requirement), helping to save the analysis time.
The installation does not require additional loopback cabling and is powered by BTQ-VM/SG/SL via
speaker line without affecting the audio signal.