APC ES 550 Leaflet

 - Direct sunlight
 - Excessive heat
 - Excessive humidity or contact with fluids

Back-UPS ES protects a single line (2-wire) fax, modem or phone from 
surges when it is connected through the Back-UPS ES as shown.

The supplied cable and software provide automatic file saving and 
shutdown of the operating system in the case of a sustained power outage.

Connect the cable to the Data Port of the Back-UPS ES. Connect the other 
end of the cable to the USB port on your computer. The software will 
automatically find the USB Port of your computer.

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990-4993A Copyright 2006 American Power Conversion Corporation

All other trademarks are property of their respective owners.

For safety, the Back-UPS ES is shipped with one battery wire disconnected. The Back-UPS ES will not operate until the wire is connected to the touch 

safe battery terminal.  NOTE: Small sparks may occur during battery connection. This is normal.

TURN the Back-UPS ES over and 

slide the battery compartment 

cover off of the battery housing.

These outlets provide full-time protection from surges even if 

the Back-UPS ES is switched OFF. Plug your printer, fax 

machine, scanner, or other peripherals that do not need 

battery power into these outlets.

These outlets are powered whenever the Back-UPS ES is 
switched ON. During a power outage or other utility problems 
(brownouts, over-voltages), these outlets will be powered for a 
limited time by the Back-UPS ES. Plug your computer, monitor, 
and two other data-sensitive devices (external disk or tape drive) 
into these outlets.

A single short beep and the green “Power On” 
indicator confirms that Back-UPS ES is on and 
ready to provide protection.

The Back-UPS ES should charge for at least 
16 hours to ensure sufficient runtime. The unit 
is being charged whenever it is connected to 
utility power, whether the unit is turned ON or 
OFF.

If the red Building Wiring Fault indicator 
(located on the end near the power cord) is lit, 
your building wiring presents a shock hazard 
that should be corrected by a qualified 
electrician.

Place the PowerChute Personal Edition CD-
ROM into your computer and follow the 
installation instructions on the screen.

LIFT the battery out of the compartment and connect the black wire to the negative (-) battery 

terminal. Ensure the batteries are installed as shown below.

APC, the APC logo, Back-UPS and PowerChute are registered trademarks of American Power Conversion Corp.

The Back-UPS ES indicates operating status using a combination of visual and audible indicators. 

Use the following table to identify the status of the Back-UPS ES. 

Power On - UPS is supplying conditioned 

utility power to the load.

Power On LED  - ON 

None

Not applicable.

On Battery - UPS is supplying battery 

power to the load connected to the Battery 

outlets.

Power On LED  - ON (off 

during beep)

Beeping 4 times every 

30 seconds

UPS transfers back to 

Power On operation, or 

when UPS is turned off.

Low Battery Warning - UPS is supplying 

battery power to the load connected to the 

Battery outlets and the battery is near 

exhaustion.

Power on LED  - flashing 

Rapid beeping (every 

1/2 second)

UPS transfers back to 

normal operation, or 

when UPS is turned off.

Replace Battery - The battery is 

disconnected.

The battery is in need of charging or is at 

the end of its usual life and must be 

replaced.

Replace Battery LED - 

flashing

Power On and Replace 

Battery LEDs-  Flashing 

(alternating)

Constant tone

Constant tone

UPS turned off with the 

power switch.

Overload Shutdown - During On Battery 

operation a battery power supplied outlet 

overload was detected.

None

Constant tone

UPS turned off with the 

power switch.

Sleep Mode - During On Battery operation 

the battery power has been completely 

exhausted and the UPS is waiting for utility 

power to return to normal.

None

Beeping once every 4 

seconds

Utility power is restored, 

or if utility power is not 

restored within 32 

seconds, or the UPS is 

turned off.

Building Wiring Fault - Your building 

wiring presents a shock hazard that should 

be corrected by a licensed electrician.

Building Wiring Fault LED 

(red) - ON

None

UPS is unplugged, or is 

plugged into a properly 

wired outlet.

Back-UPS ES 550

Slide the battery compartment cover 

completely onto the Back-UPS ES.

  Battery Backup      Surge Protection

Power On

Replace Battery

Back-UPS ES
        5 5 0

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POWER ON/

AC LINE

CORD

TO COMPUTER

USB PORT

FROM WALL JACK

DATALINE OUTPUT TO

DSL MODEM or PHONE

Data Port

Modem/

Phone/Fax

Wall

Outlet

CAUTION - Refer to bottom

    of unit for safety markings.

Circut Breaker

Push to Reset

Building

 Wiring

  Fault

BUILDING WIRING
FAULT INDICATOR

CIRCUIT BREAKER

PUSH TO RESET

REPLACE BATTERY

INDICATOR

Back-UPS ES 350

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