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The LightProcessor QBuffer and the DMX Distributor are functionally identical. The QBuffer is designed for truss mounting
and the DMX Distributor for 1U rack-mounting.
Both products split, isolate, buffer and boost incoming DMX signals to four 1kV opto-isolated output channels. They are
designed to protect against DMX line faults, incorrect connection and earth loops. Additionally they offer a means of
Y-splitting a DMX signal and boosting DMX signals in very long cable runs.
Each output channel comprises one 5-pin XLR output and one 3-pin XLR connector. (Products with eight 5-pin XLR's are
available to order). Since each of the output connectors is independently driven, all eight outputs may be used.
Installation
Verify the QBuffer's operating voltage before mounting. It should be mounted to the truss/structure using a hook
clamp attached to the M10 bolt on its top face. A suitable safety chain should be passed around the truss/structure
and through the safety loop on the QBuffer.
The DMX Distributor is designed for rack mounting. Set its operating voltage, using the rear panel voltage selector
switch. The mains cable enters through the rear panel.
Both devices are supplied fitted with one metre of mains cable for connection to a suitable mains supply of 16A
maximum.
The QBuffer's input and through DMX connections are made to the left hand side. The outputs are on the bottom.
All DMX Distributor DMX connections are made via the front panel.
The main DMX chain is connected via the 5-pin XLR input and through connectors, thus providing a signal input to
the QBuffer/DMX Distributor and a loop out to the next DMX device in the chain. If the QBuffer/DMX Distributor is
the last device in the DMX chain, the line should be terminated by pressing the DMX line termination switch.
Connect the devices to be protected to the output connectors. Note that up to eight devices may be connected but
that only four channels of opto-isolation are provided.
Link through
Terminate
Operation
The input and through connectors are directly linked. In the event of a power failure to the QBuffer/DMX Distributor
it becomes transparent and the main DMX chain remains functional.
Each output channel is fitted with a red and a green LED. These LEDs mimic the activity of the data true and data
invert DMX lines and flash rapidly during normal operation. Absence of this flashing in one LED indicates a fault on
that line. No flashing of either LED probably indicates an absence of DMX.
Safety Instructions
♦
Read all the instructions, follow them and keep the product manual available for future reference.
♦
The product should be protected externally by a fuse or circuit breaker of the appropriate rating and type.
♦
Always isolate the product completely before carrying out any work on it.
♦
Do not use the product near water, do not get it wet, do not use liquids or sprays to clean the product. Use
only a damp cloth.
♦
Install the unit only in accordance with the instructions. Do not install it in a position where it may be subject to
damage or external shocks from opening doors or other physical movements.
♦
Do not overload the product.
♦
Do not use the product if there are any external signs of damage to it or to any connecting cables.
♦
This is a professional product and should only be installed by a competent engineer. If in doubt, contact the
manufacturer. Contact details can be found in this manual.
QBuffer/DMX Distributor
120Ω
0V
5
3
Page 1
Complete Electrical
Isolation
5
3
5
3
5
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