Volume 8, Select 8,
Volume / Select 8,
Logic Box, &
Voltage Control Box
Installation Guide
Biamp Systems | 9300 S.W. Gemini Drive | Beaverton, OR | 97008 | USA | +1.503.641.7287 | www.biamp.com
Volume 8, Select 8, Volume/Select 8, Logic Box, & Voltage Control Box are natural extensions of Audia® and Nexia® products. These controls provide an intuitive interface for end-users, and can be installed and configured to fit the unique needs of a particular application. Any combination of these controls can be connected on a 5-wire daisy-chain, eliminating the need for local power sources. This connection also provides the serial communication to the Audia or Nexia system. Multiple remote control panels can be connected on a single bus, over a large physical distance.
Wiring & Termination: Each system device can support any combination of the controls mentioned above. Multiple controls may be connected to each system device (up to 32 controls per Audia device; up to 12 controls per Nexia device) on a daisy-chain 'network', with a maximum cable length of 1000 feet (300 meters). A Remote Control Bus Hub is available, which allows multiple branches to be added to a control network and the maximum network cable length to be extended. Controls are wired in parallel (pin-for-pin), using 5-conductor data grade cable (95~120 ohms nominal impedance; 16 pF/ft. max. capacitance; 65% min. velocity of prop.).
Recommended cables: Gepco 18/22AXL, Liberty AXLINK & CRESNET, or equivalent (use data pair for Hi & Lo; use power pair for + & -).
The 'network' requires termination at each 'end' for proper operation. All controls (and Audia/Nexia) include either a termination switch or jumper strap. These terminations should be disabled (switch out or jumper removed) on all devices except those at the two extreme ends of the network.
A control network may be wired with the Audia/Nexia system device at one end, and a control at the other end, creating one continuous run. In this case, the system device would have the 'term' switch engaged (in), and the control device at the other end of the network would have the 'term' switch engaged (in) or jumper installed. All other controls, between the system device and the last control, would have their 'term' switches released (out) or jumpers removed.
If a control network needs to service two areas which are in opposite directions from the system device, a network with two separate runs can be created. This type network actually remains as a single run, but is configured with the system device in the middle. Therefore, only the controls at the two extreme ends of the network would have their 'term' switches engaged (in) or jumpers installed. All other controls (including the system device), between the two end controls, would have their 'term' switches released (out) or jumpers removed. (See diagrams on opposite page.)
Logic Input Switch Wiring |
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Potentiometer Wiring |
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(Logic Box & Voltage Control Box) |
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(Voltage Control Box) |
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high (cw) |
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Logic |
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5~50kΩ |
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V |
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wiper |
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switch |
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w |
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linear |
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(1~4) |
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ground ( ) |
ccw |
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cw |
taper |
low (ccw) |
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1 V |
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ground ( ) |
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