ETC Sensor 3 User manual

ETC Installation Guide
Sensor3 BatteryPack Option
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Product information and specifications subject to change. ETC intends this document to be provided in its entirety.
7140M2180 Rev B Released 2021-03
Introduction
This guide illustrates installation of the Sensor3 BatteryPack Option. The BatteryPack Option should be
placed in the vicinity of your Sensor3 dimmer racks.
The BatteryPack Option provides battery power to CEM3 control modules for up to 45 minutes during
power outages, thereby facilitating an instantaneous recovery after power has been restored. Each
BatteryPack Option may be fitted with one or two batteries; each battery feeds one Sensor3 rack.
Required tools
• Flatblade screwdriver
• Precision flatblade screwdriver
• No. 2 Phillips screwdriver
• Small extension (dental) mirror
• Wire strippers for 1.5–2.0 mm2(14–18 AWG) wire
• Wire cutters
Required materials (not provided)
• Appropriate mounting hardware for attaching BatteryPack Option to wall
• 1.5–2.0 mm2(14–18 AWG) twisted pair of adequate length for wire run
• 3/4” or smaller conduit of adequate length for wire run
• Conduit sleeves (2)
Procedure
This procedure includes the following sections:
•
Preparation on page 2
• Mount BatteryPack Option to Wall on page 2
• Install Conduit from BatteryPack Option to Sensor3 Rack on page 2
• Connect the Battery Leads on page 3
• Connect Wiring on page 4
• Install Battery Pack(s) on page 6
• Finishing Touches on page 7

ETC Installation Guide
Sensor3 BatteryPack Option
BatteryPack Option Page 2 of 7 ETC
Preparation
1: Turn off power to the rack.
.
2: Remove the eight modules above the backplane and CEM3 slot.
3: Remove the CEM3 module.
4: Open and unpack the BatteryPack Option.
5: Using a flatblade screwdriver, loosen and remove the two thumbscrews that hold the battery pack(s)
in the BatteryPack Option. Save the thumbscrews as you will need them to reinstall the battery
pack(s) later.
6: Remove the battery pack(s) from the BatteryPack Option.
Mount BatteryPack Option to Wall
1: Choose an acceptable and accessible wall location for the BatteryPack Option in the vicinity of the
Sensor3 rack(s) to be backed up.
2: Hold the BatteryPack Option level against the wall and mark the wall through the four mounting
holes in the back.
3: Attach the BatteryPack Option to the wall using the appropriate mounting hardware (not provided).
4: Make sure the BatteryPack Option is secure before connecting conduit.
Install Conduit from BatteryPack Option to Sensor3 Rack
1: Using one of the available knockouts in the BatteryPack Option, connect conduit using a 3/4”
conduit sleeve.
2: Select an appropriate and available knockout in the Sensor3 rack to be connected to the BatteryPack
Option. Connect the conduit to the rack using an appropriate conduit sleeve for the chosen
knockout.
3: Repeat this process if you are backing up an additional Sensor3 rack.
WARNING:
RISK OF ELECTRIC SHOCK! Failure to disconnect all power to the rack before
working in the rack could result in serious injury or death.
AVERTISSEMENT :
Travailler à l’intérieur de l’armoire sans avoir déconnecté le courant peut
entrainer des blessures graves, voire mortelles.
Before removing dimmer or control modules for service, de-energize main
feed to dimmer rack and follow appropriate Lockout/Tagout procedures as
described in NFPA Standard 70E. Electrical equipment such as dimmer racks
can present an arc flash safety hazard if improperly serviced. This is due to
available large short circuit currents on the feeders of the equipment. Any
work on energized equipment must comply with OSHA Electrical Safe
Working Practices.

ETC Installation Guide
Sensor3 BatteryPack Option
BatteryPack Option Page 3 of 7 ETC
Connect the Battery Leads
In order to prevent premature battery drain, the battery pack(s) for the BatteryPack Option are shipped with
the leads disconnected. You must first open the battery pack(s) and connect the wire leads to the
appropriate terminals.
1: Open the rear cover of the battery pack using a No. 2 Phillips screwdriver. There are six screws on
each battery pack.
2: Locate the plastic bag containing the wire harness for the battery terminals. Remove the harness from
the bag.
3: Connect the red harness wire to the
positive (+) terminal and the black wire
to the negative (-) terminal on the
battery (see Figure 1 at right).
4: Replace the battery inside the battery
pack.
5: Connect the other end of the wire
harness to the circuit board connector
next to the battery (see Figure 2 at
right). The connector is keyed and can
only fit one way.
6: Replace the rear cover of the battery
pack using the six screws removed
earlier.
7: If the BatteryPack Option included a
second battery pack, repeat steps 1–6
for that battery pack.
Connect
Red wire
here
Connect
Black
wire here
Figure 1
Connect wire harness to
circuit board here
Figure 2

ETC Installation Guide
Sensor3 BatteryPack Option
BatteryPack Option Page 4 of 7 ETC
Connect Wiring
Wiring tasks differ based on whether you are installing one battery pack or two:
•One battery pack: Use the instructions that follow to terminate one set of wires between the Rack A
(left) side of the BatteryPack Option terminals and the back of the CEM3 backplane.
•Two battery packs: Use the instructions that follow to terminate two sets of wires between the Rack A
and Rack B BatteryPack Option terminals and two separate CEM3 backplanes. Make sure that each
pair of Rack A and Rack B wires are routed together to the backplanes to which they will connect. (It
does not matter which Sensor3 rack they are routed to.)
Terminate Wire to BatteryPack Option
1: Run a length of 1.5–2.0 mm2(14–18 AWG)
twisted pair wire through the conduit between
the BatteryPack Option and the Sensor3 rack.
Include extra length to facilitate terminations
and working slack.
2: Strip the wire ends 10 mm (0.39 in) and
connect them to the appropriate header
terminals in the BatteryPack Option, according
to the diagram on the BatteryPack Option cover
(see Figure 3 at right). To connect the wire to
the terminal, insert a precision flatblade
screwdriver into the rectangular slot below the
desired terminal and then insert the wire.
CAUTION:
Installation on an installed CEM3 will require negotiating load wires, termination
wires, and other obstructions. Use caution when moving, bending, or otherwise
manipulating existing wires inside of the rack. This will avoid any inadvertent
disconnections.
Figure 3

ETC Installation Guide
Sensor3 BatteryPack Option
BatteryPack Option Page 5 of 7 ETC
Terminate Wire to CEM3 Backplane
1: Find the 2-pin Phoenix connector (part number J3976-F) included with the BatteryPack Option.
2: Connect the wires from the BatteryPack Option to the 2-pin Phoenix connector using a flatblade
precision screwdriver:
• Pin 1=Positive (red)
• Pin 2=Negative (black)
When held in the orientation shown below, the top of the connector is visible. This is Pin 1. (See
Figure 4 below.)
3: Connect the 2-pin connector to the rear of the
backplane. Make sure that you align it with the red
wire on top. The connector is keyed, but can be
forced onto the mount incorrectly. If you encounter
more than a little resistance when trying to plug in the
connector, stop and make sure that the connector is
oriented correctly. It may help to use a small mirror to
view the rear of the backplane when connecting (see
Figure 5 at right.)
Top of connector
(Pin 1 side)
Wires terminated with
Pin 1 (red) on top and
Pin 2 (Black) on bottom
Connect 2-Pin connector
to rear of backplane
Figure 4
Figure 5

ETC Installation Guide
Sensor3 BatteryPack Option
BatteryPack Option Page 6 of 7 ETC
Install Battery Pack(s)
Make sure you have connected the battery leads inside of the battery pack before installing it in the
BatteryPack Option (see
Connect the Battery Leads on page 3 ).
1: Hold the battery pack so that the LED indicators are on the top.
2: Insert the flanges on the bottom of the battery pack into the slots in the BatteryPack Option (see
Figure 6 below). If you are only installing one battery pack, use the “A” (left) side of the BatteryPack
Option.
3: Raise the battery pack until it is upright inside of the BatteryPack Option, making sure that the
connector on the rear of the pack is firmly seated on the mount behind it.
4: Secure the battery pack in place using the provided thumbscrew (see Figure 7 below).
5: Repeat this procedure for the “B” (right) side if a second battery pack is being used.
Figure 6 Figure 7

ETC Installation Guide
Sensor3 BatteryPack Option
BatteryPack Option Page 7 of 7 ETC
Finishing Touches
1: Verify that all new wire terminations and connections are intact. Also verify that all existing Sensor3
connections have not been loosened or disconnected inadvertently during the installation of the
BatteryPack Option.
2: Remove any debris or other foreign material from inside of the BatteryPack Option and dimmer
rack(s).
3: Replace all dimmer modules removed from the Sensor3 rack(s) during installation.
4: Reconnect power to the Sensor3 racks. The LED indicators on the battery pack(s) may flash for a few
moments as the BatteryPack Option assesses the state of the battery.
5: Verify that the LEDs on the battery pack(s) are lit and in either the “READY” (Green) state or the
“CHARGING” (Amber) state.
• If the “CHARGING” LED is lit, be sure to check the BatteryPack Option again in a few hours to
verify that “READY” is indicated.
• If the BatteryPack Option is still charging, or if the “CHARGING FAULT” (Red) LED is lit, you may
have a drained or defective battery. See etcconnect.com/contactETC for information on how to
contact ETC Technical Services.
6: Using a No. 2 Phillips head screwdriver, replace the BatteryPack Option cover by sliding it onto the
six provided screws. Make sure the battery pack LEDs are visible through the cover window. Tighten
the screws.
7: Write the rack number of the connected Sensor3 rack(s) in the spaces provided on the BatteryPack
Option cover.
Note:
Check the BatteryPack Option LEDs monthly to verify that the batteries are still accepting
a charge. If your battery constantly indicates a “CHARGING” state or if the red
“CHARGING FAULT” indicator is lit, visit etcconnect.com/contactETC for information on
how to contact ETC Technical Services.