Stewart Filmscreen Corp LCD Front Projector - Manual (Page 12)

10 Stewart Filmscreen Corporation
Connecting the screen trigger interface and low-voltage
option (vertical masking)
The optional 12V screen trigger interface enables up and down operation of
the door and screen in conjunction with a projector, tuner, VCR, cable box,
or switched AC outlet. The low-voltage control switch controls the vertical
masking panels.
An optional infrared sensor can be installed with the low-voltage control box.
This allows an infrared remote control to adjust the vertical masking panels.
Note: An optional 12V DC transformer is used if there is no 12V power
source from the projector or AV control center.
Preparing the connection
Before making the electrical connections, you need:
‹ An available AC constant power source installed near the screen
‹ A 4-conductor switch hook-up cable (4-conductor bell wire or
category 5 cable is typically used for long runs)
‹ Cat 5, multi-conductor unshielded, or similar type electronic cable
can be used to connect the 3-button switch to the LVC. The
recommended wire gauge is 20 to 24 AWG. Use plenum-rated
cable when required.
Making the connection
Figure 7 illustrates the connections.
1. Attach the 12V trigger wire to the jack on the box.
2. Connect the main AC power source to the the J-box labeled
“main AC power connection.”
3. Connect the 4-conductor cable to the connection harness coming
from the J-box labeled “switch input.”
4. Connect the hookup cable to the 3-button switch.
Note: The two toggle switches on the electrical connection housing are
used by the factory only. Do not adjust.
Caution
Refer to the First Time Activation note in the section
“Operating the Screen.”