Interspace Industries TheatreCue 16 Way V4 System - 16 Outstations - Manual (Page 27)

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Star wiring
Outstation Cables (Continued)
Star wiring uses more cable than daisy chain wiring, and as
a result has higher overall cable capacitance (this is not
desirable) .
At the star point, all the cables are simply wired in parallel.
This is often done at a patch panel.
The star configuration also has considerable attenuation for
signals travelling from an outer extremity towards the star
point.
Cable branches with nothing plugged into them will also
decrease the data signal’s amplitude due to the cable’s
capacitance which is still connected to the circuit.
For star wiring, do not exceed the recommended total of
2,000 metres.
The lumped capacitance of all the legs of a star driven in
parallel via the impedance of one leg makes a very nice
low pass filter which attenuates the data.
Technical note
Star wiring.
Theatre Cue Light Master QLM16i2 Mk4
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27.
While the star configuration works well and may be
convenient, it is not the optimum wiring arrangement due to
its increased attenuation of the data signal. It is best used in
combination with daisy chain and loop configurations.
Loop wiring has the advantage that when a cable breaks or
becomes disconnected, the system remains 100%
operational.
When designing a loop configuration, allow for the worst
case scenario where either of the 2 cables are unplugged at
the Master Station. The cable gauge needs to be selected
such that all of the Outstations can operate on what has
now become a single long run.
Refer to the table on page 32.
Loop wiring
Loop wiring
Theatre Cue Light Master QLM16i2 Mk4
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Standby GO
Station # Confirm
In/Out In/Out
www.interspaceind.com
Cue Light
Model QLSi2 Mk4
Evesdrop Normal
&
Standby GO
Station # Confirm
In/Out In/Out
www.interspaceind.com
Cue Light
Model QLSi2 Mk4
Evesdrop Normal
&
Standby GO
Station # Confirm
In/Out In/Out
www.interspaceind.com
Cue Light
Model QLSi2 Mk4
Evesdrop Normal
&
Standby GO
Station # Confirm
In/Out In/Out
www.interspaceind.com
Cue Light
Model QLSi2 Mk4
Evesdrop Normal
&
Standby GO
Station # Confirm
In/Out In/Out
www.interspaceind.com
Cue Light
Model QLSi2 Mk4
Evesdrop Normal
&
Standby GO
Station # Confirm
In/Out In/Out
www.interspaceind.com
Cue Light
Model QLSi2 Mk4
Evesdrop Normal
&