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Back-UPS ES 350/500
User’s Guide
Connect Battery
The Back-UPS ES is shipped with one battery wire disconnected in compliance with Department of Transportation (DOT) regulations. 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
remove the battery compartment
cover screw using a flat blade or
phillips-head screwdriver.
LIFT the battery out of the compartment and connect the
black wire to the battery terminal.
Replace the battery,
battery compartment
cover and cover
retaining screw.
Back-UPS ES 500
Back-UPS ES 350
Slide the battery
compartment cover
completely off of
the Back-UPS ES.
Battery Back-up plus
Place the Back-UPS ES to avoid:
- Direct sunlight
- Excessive heat
- Excessive humidity or contact with fluids
Surge Protection
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 one other data-sensitive device (external disk or tape
drive) into these outlets.
Battery Backup plus
Connect FAX/Modem/Phone
Back-UPS ES protects a single
line (2-wire) fax, modem or
phone from surges when it is
connected through the BackUPS ES as shown.
Surge Protection
Connect Computer Cable
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 BackUPS 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
Wall Outlet
Surge Protection
Power On
Plug the Back-UPS ES power cord directly
into a wall outlet; not a surge protector or
power strip.
Surge Protection
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.
Power On and
Install Software
Press the ON/OFF switch to power the unit
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
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
Install the PowerChute Personal® Edition
Place the PowerChute Personal Edition CDROM into your computer and follow the
installation instructions on the screen.
990-9197 Revision 1 11/01 Copyright © 2001 American Power Conversion Corp.
UPS Power
On Indicator
AC Line
USB Port
Building Wiring
Status Indications
The Back-UPS ES indicates operating status using a combination of visual and audible indicators.
Visual Indications
Audible Indication
Alarm Terminates
On Line - UPS is supplying conditioned
utility power to the load
Power On LED - ON
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
On Line operation, or
when UPS is turned
Low Battery Warning - UPS is supplying
battery power to the load connected to
the Battery outlets and the battery is near
Power On LED Flashing
Rapid beeping (one
second intervals)
UPS transfers back to
On Line operation, or
when UPS is turned
Replace Battery - Battery needs to be
checked and/or replaced, or battery is not
Power On LED Flashing
Constant tone
UPS turned off with
the power switch.
Overload Shutdown - During On Battery
operation a battery power supplied outlet
overload was detected.
Power On LED - OFF
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
Power On LED - OFF
Beeping once every
4 seconds
UPS transfers back to
On Line operation, or
when UPS is turned
Building Wiring Fault - Your building
wiring presents a shock hazard that
should be corrected by a licensed
Building Wiring Fault
LED (red) - ON
UPS is unplugged, or
plugged into a
properly wired outlet.
See the Troubleshooting section for additional assistance.
APC, Back-UPS and PowerChute are registered trademarks of American Power Conversion Corp.
All other trademarks are property of their respective owners.
Use the table below to solve minor Back-UPS ES installation or operation problems. Consult APC Online Technical Support or call APC
Technical Support for assistance with problems that cannot be resolved using the table below:
Probable Cause
Back-UPS ES will not turn on.
Battery is disconnected and utility power is not available at
the wall outlet.
Connect the battery (see Connect Battery) and ensure power is available at the wall
No power available at the Surge Protection
Surge Protection outlets have been overloaded.
Reduce the amount of equipment plugged into Surge Protection outlets.
Utility power not available at the wall outlet.
Ensure that the fuse or circuit breaker for the outlet is not tripped, and that the wall
switch controlling the outlet (if any) is in the ON position.
Equipment is connected to the “Surge Protection” outlets.
Ensure that the equipment you want to stay powered during a power failure is
plugged into the “Battery Backup plus Surge Protection” outlets and NOT the “Surge
Protection” outlets.
The Back-UPS ES is overloaded.
Make sure that the equipment plugged into the outlets of the unit are not overloading
the capacity of the unit. Try removing some of the equipment and see if the problem
PowerChute Personal Edition software has performed a
shutdown due to a power failure.
The Back-UPS ES is operating normally.
The Back-UPS ES has exhausted its available battery
The Back-UPS ES can only operate on battery power for a limited amount of time.
The unit will eventually turn off when the available battery power has been used.
Allow the unit to recharge for 16 hours before continuing use of the unit.
Connected equipment does not accept the stepapproximated sine waveform the Back-UPS ES.
The output waveform is designed for computers and computer-related equipment. It
is not designed for use with motor-type equipment.
Connected equipment loses power.
The Back-UPS ES may require service.
Contact APC Technical Support for further troubleshooting.
The Power On indicator is lit and the BackUPS ES is beeping four times every 30
The Back-UPS ES is using battery.
The Back-UPS ES is operating normally and using battery power. Once On Battery,
you should save your current work, power down your equipment, and turn the unit
OFF. Once normal power is restored, you may turn the unit back ON and power
your equipment.
The Power On indicator flashes once per
second and the Back-UPS ES beeps once
per second at the same time.
Battery capacity is low (about 2 minutes of use remaining).
The Back-UPS ES is about to shut off due to a low battery charge condition! When
the unit beeps once every second, the battery has about 2 minutes of power
remaining. Immediately power down your computer and turn the unit OFF. When
normal power returns, the unit will recharge the battery.
Building Wiring Fault indicator is lit.
Your building wiring presents a shock hazard. Using the
Back-UPS with this condition will void the warranty.
Call a qualified electrician for service.
Inadequate runtime.
The battery is not fully charged.
Allow the unit to charge by leaving it plugged into the wall at least 16 hours.
Battery is near the end of useful life.
As a battery ages, the amount of runtime available will decrease. You can replace
the battery by ordering one at Batteries also age prematurely if the
Back-UPS ES is placed near excessive heat.
Order Replacement Battery
120 Vrms Nominal
47 - 63 Hz
Brownout Transfer
UPS Capacity (3 outlets)
136 Vrms, typical
350 VA / 200 W
12 Amps (including UPS output)
On Battery
115 Vrms + 8%
(step-approximated sine wave)
Transfer Time
50-60 Hz + 1 Hz
Single line (2-wire)
EMI/RFI Filter
Average Life
Net Weight
Please DO NOT RETURN Back-UPS ES to the place of purchase under any
Full time
Resettable circuit breaker
Sealed, maintenance-free lead acid
2 - 4 years depending on the number of discharge
cycles and environmental temperature
9.20 lb. (4.18 kg.)
13.25 lb. (6.02 kg.)
1. Consult the Troubleshooting section to eliminate common problems.
2. Verify the battery is connected (see Connect Battery) and that the Circuit Breaker is
not tripped (see Troubleshooting section).
If you still have problems or questions, please contact APC via the internet or at one of
the phone numbers listed below.
3.3” (H) x 10.9” (W) x 6.9” (D)
(8.3 x 27.8 x 17.5 cm)
3. Before contacting APC, please be sure to record the date purchased, UPS model,
and serial number (on bottom of unit).
Operating Temperature
+32 o F
4. Be prepared to troubleshoot the problem over the telephone with a Technical
Support Representative. If this is not successful, the representative will issue a Return
Material Authorization Number (RMA#) and a shipping address.
Storage Temperature
Operating Relative Humidity
Operating Elevation
Full time, 375 joules
Telephone Surge Protection
AC Input
The standard warranty is 2 years from the date of purchase. APC’s standard
procedure is to replace the original unit with a factory reconditioned unit. Customers
who must have the original unit back due to assigned asset tags and set depreciation
schedules must declare such a need at first contact with APC Technical Support. APC
will ship the replacement unit once the defective unit is received by the repair
department or cross-ship upon the provision of a valid credit card number. The
customer pays for shipping to APC, and APC pays ground freight transportation costs
back to the customer.
5 ms typical, 8 ms maximum
Protection and Filter AC Surge Protection
500 VA / 300 W
Surge Capacity (6 outlets)
Frequency - On Battery
96 Vrms, typical
Over-voltage Transfer
Replace with an APC qualified battery. Replacement batteries can be ordered from (valid credit card required). Have your Back-UPS ES model number
available when ordering. Your model number can be found on the bottom of the unit.
Safety Approvals
EMC Compliance
104 o F
(0 oC
40 oC)
+ 5 F to 113 F (-15 C to 45 C)
0 to 95% non-condensing
0 to 10,000 ft (0 to 3,000m)
UL 1778 listed, cUL certified per
CSA standard C22.2 No. 107.1
FCC part 68, FCC part 15 Class B
Notice: This device complies with part 15 of
the FCC rules. Operation is subject to the
following two conditions: (1) This device may
not cause harmful interference, and (2) This
device must accept any interference received,
including interference that may cause
undesired operation.
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Pack the unit in its original packaging. If the original packaging is not available, ask
APC Technical Support about obtaining a new set. Pack the unit properly to avoid
damage in transit. Never use foam beads for packaging. Damage sustained in transit
is not covered under warranty (insuring the package for full value is recommended).
5. Write the RMA# on the outside of the package.
6. Return the unit by insured carrier to the address given to you by APC Technical
APC Contact Information
Online Technical Support . . . . .
Web Site . . . . . . . . . . . . . . . . . . .
USA/Canada . . . . . . . . . . . . . . . 1.800.800.4272
Mexico . . . . . . . . . . . . . . . . . . . . . +52.292.0253 / 52.292.0255
Brazil . . . . . . . . . . . . . . . . . . . . . . . +0800.12.72.1
Worldwide . . . . . . . . . . . . . . . . . +1.401.789.5735
Toll Free: (877) 892-2666
7.08 in.
(180 mm)
Wall Mounting Template
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