Stewart Filmscreen Cabaret, Руководство пользователя

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Stewart Filmscreen
– Cabaret
19
12 VOLT PROJECTOR TRIGGER (STANDARD)
The dry contact/trigger wire, coming out of the rear audience left of the case, can be used to
terminate a triggering system for the projector. Since Stewart Filmscreen cannot be certain how long
of a cable will be needed for every single application, the trigger cable will have to be assembled by
the installer. (Figure 20) below shows what the dry contact/trigger wire looks like and how to
terminate the trigger functionality.
HOW IT WORKS
When a trigger-signal equipped projector is turned on or off, voltage is either supplied or withdrawn
via a class II two-conductor wire connected to the screen. 12 volts DC, 200 milliamps, should be
applied to Green and White wires with the + voltage on Green. When 12 volts is no longer present,
the screen will retract. The projector delivers between 5 and 12 volts when it is powered. The
screen control (IMC) interprets this voltage as a prompt to deploy the screen. If there is a sudden
change in voltage, the motor is paused for ½ of a second before reversing direction. This is to
prevent strain on the motor mechanism and to prevent damage to any material controlled by the
motor. The IMC is designed to be energized constantly, so that it can react promptly and accurately
to the control options you have selected for your specific installation. When the projector and screen
are energized, the control system relay is also energized. In the retracted position, relays are
automatically de-energized after 120 seconds of operation to reduce power consumption.
Figure 20: IMC Low Voltage connections
for Dry Contact/Trigger wire
White
–
Common, connect with Green
(Trigger) for trigger wire.
Red
–
Up
Black
–
Down
Green
–
Trigger, connect with White
(Common) for trigger wire.
IMC