Network Connections - Tannoy VSXNET Series Operation Manual

7. Network Connections

Interconnection between the network computer and the speakers is very straight forward, using twisted pair
cable and simple connectors. The RS485 interface operates on a shared bus so that a single computer can
control any amplifier on the bus, and the computer may gather status information from any device on the bus.
Each module contains a unique address so that no user input will be required to configure network nodes.
It is only data that is carried over the network to control setup functions & ongoing system diagnostics, therefore
if a network fault occurs, audio can still be delivered. This alleviates the problem of total system failure through a
single system controller going down. As each loudspeaker controls it own DSP functions any unforeseen failure
would be isolated to only that particular 'node'.
example network
RS-485 is standard for sending serial data. It uses a pair of wires to send a differential signal over distances up
to 4000 feet (1200 m) without a repeater. The differential signal makes it very robust, RS-485 is one of the most
popular communications methods used in industrial applications where it s noise immunity and long-distance
capability are a perfect fit.
IMPORTANT: Always run a signal ground with RS-485
Connection from the PC to the network is via a 3rd party RS232 to RS485 or USB to RS485 interface. These
devices are readily available from your IT supplier. At the time of writing this manual extensive testing was carried
out with the following devices:-
Tannoy USB — RS485 Converter (Part No. 8001 3920)
K2 from KK (www.kksystems.com)
USB-COMi from Easysync (www.easysync.co.uk)
485 SD9R from B&B electronics (www.bb-elec.com)
RS485
3rd party RS232/
USB to RS485 interface
7. Network Connections
VSXNET Series VSXNET Series
RS485 link
VSXNET Series VSXNET Series
RS485 link
VSXNET Subwoofer Operation Manual rev 2.0.0
RS485 link
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