ETC Sensor3 Battery Backup Unit User Manual

ETC® Setup Guide

Sensor®3 Battery Backup Unit Installation Guide

Introduction

This guide illustrates installation of the Sensor®3 Battery Backup Unit. This unit should be placed
in the vicinity of your Sensor3 dimmer racks.

The Sensor
minutes during power outages, thereby facilitating an instantaneous recovery after power has
been restored. Each Battery Backup Unit may be fitted with one or two batteries; each battery
feeds one Sensor3 rack.

Required tools:

• Slotted screwdriver

• Precision slotted screwdriver

• No. 2 Phillips screwdriver

• Small extension (dental) mirror

• Wire strippers for 14-18 AWG (1.5-2.0mm

•Wire cutters

Required materials (not provided):

• Appropriate mounting hardware for attaching unit to wall

• 14-18 AWG (1.5 - 2.0mm

• 3/4” or smaller conduit of adequate length for wire run

• Conduit sleeves (2)

®

3 Battery Backup Unit provides battery power to CEM3 control modules for up to 45

2

) wire

2

) twisted pair of adequate length for wire run

Procedure

This procedure is broken down into the following subsections:

Preparation

Step 1: Turn off power to the rack. Before removing dimmer or control modules for

WARNING:

Preparation on page 1

Mount Unit to Wall on page 2

Install Conduit from Unit to Sensor3 Rack on page 2

Connect the Battery Leads on page 2

Run Wire from Unit to Rack on page 3

Install Battery Pack(s) on page 4

Finishing Touches on page 4

service, de-energize main feed to dimmer rack and follow appropriate Lockout/
Tagout procedures as described in NFPA Standard 70E. It is important to note
that 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.

RISK OF ELECTRIC SHOCK! Failure to disconnect all power to the rack
before working in the rack could result in serious injury or death.

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Setup Guide:

Connect wire harness to

circuit board here (Step 5)

Connect Red
wire here

Connect Black
wire here

Step 2: Remove the eight modules above the backplane and CEM3 slot.
Step 3: Remove the CEM3 module.
Step 4: Open and unpack the Battery Backup Unit.
Step 5: Using a slotted (flat head) screwdriver, loosen and remove the two thumbscrews that

hold the battery pack(s) in the unit. Save the thumbscrews as you will need them to
reinstall the battery pack(s) later.

Step 6: Remove the battery pack(s) from the unit.

Mount Unit to Wall

Step 1: Choose an acceptable and accessible wall location for the Battery Backup Unit in the

vicinity of the Sensor3 rack(s) to be backed up.

Step 2: Hold the unit level against the wall and mark the wall through the four mounting holes

in the back of the unit.
Step 3: Attach the unit to the wall using the appropriate mounting hardware (not provided).
Step 4: Make sure the unit is secure before connecting conduit.

Install Conduit from Unit to Sensor3 Rack

Step 1: Using one of the available knockouts in the Battery Backup Unit, connect conduit

using a 3/4” conduit sleeve.
Step 2: Select an appropriate and available knockout in the Sensor3 rack that you intend to

backup. Connect the conduit to the rack using an appropriate conduit sleeve for the

chosen knockout.
Step 3: Repeat this process if backing up a separate Sensor3 rack is desired.

Sensor3 Battery Backup Unit

Connect the Battery Leads

In order to prevent premature battery drain, the battery pack or packs for this unit are shipped with
the leads disconnected. You must first open the battery pack(s) and connect the wire leads to the
appropriate terminals.

Step 1: Open the rear cover of the battery pack using a No. 2 Phillips screwdriver. There are

six screws on each battery pack.
Step 2: Locate the plastic bag containing the wire harness for the battery terminals. Remove

the harness from the bag.
Step 3: Connect the red harness wire to the positive (+) terminal and the black wire to the

negative (-) terminal on the battery pack.
Step 4: Replace the battery inside the battery pack housing.
Step 5: Connect the other end of the wire harness to the circuit board connector next to the

battery pack (indicated below). The connector is keyed and can only fit one way.

Sensor3 Battery Backup Unit Installation Guide Page 2 of 4 Electronic Theatre Controls, Inc.

Step 6: Replace the battery cover using the six screws removed earlier.
Step 7: Repeat the process for other battery packs being installed in the system.