P/N PM000199A • Rev. 2 • ISS 25MAY2017
ascom
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© 2017 Ascom, Inc.
NUDL-Series Dome Light
Installation Sheet
Description
The NUDL-series dome light modules are bright, easy-to-
see visual annunciators that signal call events and provide
power connections for modules attached to a room bus.
The dome lights connect to the hallway bus. The series
includes the NUDL2S-H (two-section dome light) and the
NUDL4S-H (four-section dome light). It also includes an
auxiliary I/O connector with two inputs and one relay
output. The relay is only available in the NUDL4S-H.
Installation
Note: Before beginning the installation, ensure all the
necessary cables are available and are properly
terminated. RJ-45 connectors should be terminated in
accordance with the T568B or EIA 568B connection
standard.
The dome light mounts to a backbox using a backplate
(included) that supports the device. The backplate
includes holes for mounting on EU backboxes. In areas
where no backbox is available, a backplate spacer can be
used to mount the device directly to a flat wall surface.
Backplate spacers are sold separately.
Backplate
To mount the backplate on a backbox:
1. Loosen the screws so that approximately 5mm (.20in.)
extend from the backbox.
2. Pull the cables from the backbox though the backplate
hole.
3. Place the backplate over the backbox (with the arrow
facing up) so that the heads of the screws can pass
though the key-hole slot.
4. Turn the backplate until its top is level.
5. Tighten the screws until they are snug. Do not over-
tighten.
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