Audio Input; Trigger Output - CAMBRIDGE Qt Conference Room Edition Installation And Operation Manual

I NS TAL L AT I ON
Power supply
In most cases the 24v power supply will need to be located remotely, with a cable run from the power
supply to the controller. In some cases a wall plate such as the Vanco 120614X permits in-wall running of
the power wire to an AC plug on the exterior of the wall.
The power supply wire may be extended using appropriate cable and connectors. The cable should be
UL rated and plenum rated if routed through any plenum space.

Audio Input

Optionally the QtCRE includes an audio input usable for music or paging. The input is fully functional
regardless of front panel or contact closure control. Therefore, the system may be used for music or
paging even when masking is muted or off.
Balanced Audio Input: (Most often, but not always characteristic of paging
systems.) Connect signal wires to + and - at the input. Connect the shield to
GND at the audio source.
Unbalanced Audio Input: (Typical of music systems.)
Contact closure input
This terminal can be used either for remote triggering by a Crestron, AMX, or other control system.
In either case, the contract closure takes priority over the front panel control settings. Contact closure
ramp speed can be set separately from front panel control ramp speed.

Trigger output

The trigger output provides nominally 5VDC when the system is operating at Normal level, for use
in triggering other devices or to provide an acknowledgment signal back to an external automation
system like a Crestron. Note that upon initiation of a downward ramp event, deactivation of the trigger
signal will lag the completion of the downward ramp by several seconds in addition to the ramp down
time parameter configured on the ST1000 control module. During a ramp-up to Normal operating level
event, the full and consistent activation of the trigger voltage may not be complete until the Normal
operating level is reached. Control system programs should be written to anticipate and accommodate
this behavior.
Qt Conference Room Edition Installation and Operations Guide
▪
Mono Signals: Connect the mono signal wire to both L and R (split
the wire) on the block. Connect the ground wire to GND.
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Stereo Signals: Connect the respective signal wires to L and R on the
block. Connect the ground wire to GND.
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