ASCOM NU Series Installation Manual page 66

Installation Manual
NU-Series Hardware
Mounting the Module Without a Backbox
When no backbox is available, mount the dome light directly
to a flat wall surface using four screws suitable for the wall
type. Cable wires should enter and leave the dome light's
housing though the hole in the center of the backplate
spacer, or through the knock-outs at the top and sides of the
backplate spacer.
Consider where the connecting cables are located. If the
connecting cables are run inside the wall, locate the device
over the hole where the cables extend from the wall. If the
connecting cables are run in a channel outside the wall, locate
the device below and to the right or left of the channel,
where the cables exit the channel. The cables should enter
though the knockout holes in the device's backplate.
Do not distort or twist the backplate when mounting it to a
wall. If the backplate is distorted, the dome light will not fit
properly and may fall off. To prevent distortion, only mount
the backplate on a smooth and level surface. Do not over-
tighten the screws.
Backplate spacer with directional arrow and knockouts
Legend
(1) Directional arrow indicator
(2) Top knockouts
(3) Side knockouts
To remove the knockouts:
1. Determine how much space will be needed to
accommodate the cables entering the dome light's
housing, and then choose which knockouts to remove.
2. Removed from the top or sides of the backplate. See the
figure above, items 2 and 3.
3. Using a cutter or pliers, carefully remove the excess plastic
from the knockouts.
2 of 5
P/N PM000223A • Rev. 1 • ISS 9 August 2017
Hallway Devices
To mount backplate spacer on a wall:
1. Place the backplate spacer against a flat wall and orient
it so that the arrow (printed on the inside of the
backplate) is pointing up and that the backplate is level.
Use a leveling device to check, if necessary.
2. Using the backplate as a template, mark four holes for
the screws using the fitting holes located in the
backplate.
3. Remove the backplate and drill holes for the screws that
will be used, such as wood, concrete, or drywall screws,
or screws with anchors.
4. Place the backplate over the holes, insert the screws, and
then tighten.
5. If the cables come through the wall, pull the cables
through the hole in the center of the backplate spacer.
-or-
If the cables come through a channel attached to the
outside of the wall, use the knock outs at the top and
sides of the backplate spacer.
Connecting Cables and Setting DIP Switches
The NUDL-series dome light provides RJ-45 jacks for
connecting the light to the hallway bus. It also provides
RJ-45 jacks for attaching a room bus, a 4-pole or 6-pole
terminal for connecting auxiliary devices, and DIP switches
for setting the dome light's hallway bus address.
The following figure shows the DIP switches and cable
connections on the back of the NUDL-series dome lights, as
well as the power connection, status LED, and buzzer.
P/N PM000199A • Rev. 2 • ISS 25MAY2017
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