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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 
1300 666 595.

2.  If all looks okay, installation can proceed.
3.  Use a pencil to mark the position of the mounting screw holes for the inverter and the battery pack in the gear tray. 

Figure 1 describes the inverter pack dimensions.

  

    
4.  Fit the inverter and battery pack using suitably sized screws and nuts. Make sure that the battery pack is mounted as 

far as possible from the ballast or from any other components that may get hot.

Wiring connections

Following below are the wiring connections to wire power pack as maintained, non-maintained and sustained. When 
wiring power pack to a sustained fitting, the fitting must be programmed as sustained using utility tools. Ensure that the 
stripped wire ends are completely inserted into the terminal block and no bare conductors are exposed to the metal. 

Note:

 Wiring connections are different if using electronic or other magnetic ballast.

Data connections

Data cable connects via the 3-way strain relief plug (supplied with the power pack) to the data terminal as shown in figure 
2.

Note:

 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. You will need to consult the Nexus user and technical guide.

Warning:

 No mains carrying cables are to be connected to the data terminals or cables. 

5.  Light sensing clip (LDR) monitors mains on/off lamp condition and is to be affixed on the mains lamp/tube refer figure 

2. Please note the light sensing clip (LDR) is not supplied for PL lamp power packs and the PL lamp power packs are 
programmed as non-maintained (refer PL lamp warning on page 1).

6.  Lamp operation;

 

− Maintained; once powered up, in a maintained fitting the normal AC lamp (if present) should light up and stay on until 

the power supply fails. The emergency function of the unit should only operate when the unswitched active power 
supply fails or when somebody presses the manual test button located on the fitting. The emergency function also 
operates when the fitting receives a command from the Nexus controller to switch into emergency mode.

 

− Non-maintained; once powered up, in a non-maintained fitting the present lamp stays off. The emergency function of 

the unit should only operate when the unswitched active power supply fails or when somebody presses the manual 
test button located on the fitting. The emergency function also operates when the fitting receives a command from the 
Nexus controller to switch into emergency mode.

7.  When you first install the new power pack Nexus its LED will be flashing green. During different modes of operation the 

LED status should be as following.

  

   
      Refer to the Nexus user and technical guide for detailed description of all possible LED states and their meanings.
8.  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 manual test button located on the fitting. Press and hold 
the test button for a few seconds and observe that the emergency lamp lights up and stays on, until the test switch 
is released. If the lamp works only momentarily, this ensures that the connections are correct and the battery requires 
at least 24 hours to fully charge. If the lamp does not work at all, check the supply, the connections and the trouble 
shooting guide at the end of this document.

9.  Once manually checked as per item 8 above, the fitting is ready to be communication tested and commissioned into 

the Nexus network. Keep the information details of this fitting including exact location description, DB (distribution 
board) and CB (circuit breaker) numbering, channel and router numbering, plan number and cross referencing 
information as all this will be required for entry into the database during commissioning. Refer to the Nexus user and 
technical guide for full details. As the installer, it is your responsibility to conduct the initial discharge testing of the 
installed fitting. Refer to AS/NZS2293.

Removal instructions

1.  Before removing the installed power pack Nexus, switch off the mains supply to the fitting.
2.  Unscrew/unplug the unswitched active, switched active, neutral and output (lamp and ballast) wire connections from 

the terminal block using a suitably sized screwdriver.

3.  Undo the test switch nut and remove LED from the grommet.
4.  Unscrew/unplug the data cable connection from the terminal block and remove sensing clip from the tube/lamp. 
5.  Disconnect the battery plug from the battery pack and then unscrew the mounting screws of the power pack Nexus.
6.  When the fitting is reconnected to the supply, it will need time to recharge its battery before it will be capable of a full 

length discharge again. 

Note:

 When sending power packs Nexus for repair make sure that LED, test switch and light sensor are included with the 

power pack.

Testing precautions

Once the fitting is permanently connected to the mains supply, a commissioning discharge test as required in    
AS/NZS2293.2 must be carried out. You will need to allow 24 hours for the battery to fully charge prior to conducting 
this test, presently (at the time of writing), the standard requires that fittings operate in emergency mode for a period not 
less than 2 hours for their commissioning test and for not less than 90 minutes thereafter (it is required that 6 monthly 
discharge tests be carried out). You will need to keep the records for the commissioning test and enter them into the 
building emergency services logbook or via other recording methods as allowed by AS/NZ2293.2.

Figure 1:

 Inverter pack Nexus dimensions; length 236mm, width 47mm, height 41mm

Figure 2:

 Wiring diagram power pack Nexus using conventional magnetic ballast

Flashing orange

Wink mode cable tracing is on. Valid messages are being received by the unit

Static orange

Wink mode cable tracing has been turned off

Static red

Unit has been commissioned and battery is charging

Flashing red

Unit is under test

Red

LDRM

FSU

Clip

LDR

Data

LED

Black

White

Test
switch

Shield

Data

Switched active
Unswitched active
Neutral     240Vac
Earth        50Hz

Ballast

Switched
active

1 x __ W maintained

Data

Shield

Data

Red

Black

White

LED

Test
switch

1 x __ W maintained

Unswitched active
Neutral     240Vac
Earth        50Hz

236

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