Installation instructions
1. Remove the unit from the packing box and inspect it for damage or imperfections. If any damage is found, do not
install the unit, but replace it carefully into the packing box and notify the ABB product support hotline in Australia on
1800 222 435.
2. If all looks okay, installation can proceed.
3. Undo 2 screws and remove the lid as shown in figure 1.
4. Undo 2 screws and remove the gear tray from the base as show in figure 2.
Note: Carefully unplug the mains cable assembly from the PCA in order to completely remove the gear tray from the
base.
5. Determine the mounting location and studs position in the wall, check and verify that there is adequate space in the
wall cavity for a box size 182mm height x 365mm width x 85mm depth and there is no obstruction for mains cable
running. Allow 50mm clearance from the ceiling or wall corner for the cover.
6. Mark, double check and cut out a hole size 182mm height x 365mm width in the wall. See figure 3.
7. Orient the base such that the test switches are on the right hand side corner for the wall cut out.
8. Determine the mains cable entry direction then remove the appropriate knockout from 1 side of the base.
9. Route the mains cable through the knock out and mechanically protected it by a grommet, gland or bush as it passes
through cable entry.
10. Insert and push the base flush to the wall. Secure it to a wall stud by using 2 appropriate fixings (not supplied due to
variety types of building construction materials used). For double brick wall; use suitable adhesive or fastener (liquid
nail, epoxy anchor, etc.) to secure the base in place.
11. Strip 9mm insulation length from mains cable, connect
and terminate wires to the terminal block. Be careful with
multi-strand conductors that all the strands are twisted
together before insertion into the terminal. Any stray
strands that inadvertently come into contact with their
neighbouring terminal will cause undesirable results when
the fitting is powered.
12. This step is for monitored fittings only. For a Nexus LX fitting; terminate and connect data cable to the 2 way terminal
block as shown in figure 4. For a Nexus RF fitting; ensure that the antenna is fitted to the gear tray and is tight. For
more details refer to the data connections section.
13. Verify that the battery is connected to the PCA then connect the mains cable assembly to the PCA.
14. Secure the gear tray to the base by 2 screws as shown in figure 2 and lid as shown in figure 1.
15. Check the operation of the fitting to ensure that the installation was successful. When powered up, allow a few
minutes to give the battery a small charge then press the test button to ensure that unit is functional in emergency
mode.
Data connections - Nexus LX and Nexus RF product range
Important note: 24 hours is required to allow the fitting battery to reach full capacity, ie: prior to a discharge test. As the
installer, it is your responsibility to conduct the initial discharge testing of the installed fitting. Refer to AS/NZS2293.
Wire/fitting type Maintained - no SA
Unswitched active Wire to terminal A
Neutral Wire to terminal N
Earth Wire to terminal E or
Nexus LX fitting
Connect the data cable to the green connector on the power pack or PCA, or to the fixed
terminal block marked DATA.
When correctly installed no fitting should have more than 2 data cables connected to it.
If you have more than 2 data cables at any 1 fitting, the installation is incorrect.
If this fitting is at the end of a data cable run, a terminator needs to be connected across
the 2 data lines.
If there is an in and out data cable, then the shields should be wound together, folded back
and taped up.
Consult the Nexus user and technical guide for further detail, including product
commissioning.
Nexus RF fitting
Fit the antenna connector through the vacant hole on the gear tray and connect the
antenna to it as shown.
Collect the MAC address, by removing the peel off sticker section and locating it on your
floor plan or spreadsheet.
Note: Other end of the antenna has been pre-connected to the power pack or PCA.
Consult the Nexus user and technical guide for further detail, including product
commissioning.
Antenna
Cable
Fitting type Indicator LED state - on initial powering - no fitting faults
Non-monitored Solid red
Nexus LX Flashing green
Nexus RF Green flash with 2 red blinks, green flash with 3 red blinks
Figure 1
Figure 2
Figure 3
Figure 4
Loosen the
screw to
remove the lid
Loosen the screw to
remove the gear tray
Mains cable
and grommet
Plasterboard
Mounting
holes
Test button on
lower side
Wall stud
Secure base to wall stud by 2 screws
Base
359.0mm 12.0mm
10.0mm
79.3mm
88.6mm
177.6mm
3 knockouts to
access cables
3 way terminal
block for mains
cable
2 way terminal
block for Nexus
LX
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