Tannoy QFLEX User Manual page 49

The VNET network uses the RS-485 protocol for sending serial data. It uses a pair of wires to send a differential signal
over distances up to 4000 feet (1200m) 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 its noise immunity and long-distance
capability are a perfect fit.
IMPORTANT: Always run a signal ground with RS-485
Connections from the USB to VNET device to the QFlex speaker is as follows:-
From USB – VNET
Interface
(or third party interface)
B+
A-
GND
Network connections between nodes are via rugged Neutrik ethercon connectors; these are high quality and are
compatible with standard RJ45 plugs. Node connections are made using standard RJ45 connectors and CAT5 cable.
Long runs should be solid core, but standard is fine. The implication is that stranded is more robust and less prone to
breakage, it is therefore suggested that solid should be used for install applications while stranded is better suited to
rental applications. Cabinets can be daisy chained or linked in a star configuration, or a combination of both. Quality
termination of all connectors at each node is essential for the network to function correctly.
Linking QFlex Cabinets -
The table below shows the standard straight-through convention for CAT5 patch cables (clip down). These can be used
between network nodes. Bear in mind though that only Pins 1, 2, & 5 are used to link the network together.
Pin 1 (pin No.) Pin 2 (pin No.)
1
2
3
4
5
6
7
8
To aid the construction of very large networks each speaker provides a source of power (+12Volts) on the network Link
connector that can be used to seamlessly power network extenders or repeaters that large networks may require. This
power can be located on pin 4 on the NETWORK LINK connector. This power is passed between the NETWORK IN &
NETWORK LINK connectors if the speaker is powered off to ensure that upstream VNET powered devices continue to
receive power.
Device RJ45
To VNET Network
Pin 1
Pin 2
Pin 5
Colour
1 White/Orange
2 Orange
3 White/Green
4 Blue
5 White/Blue
6 Green
7 White/Brown
8 Brown