Liebert Power Supply 500 650 VA User Manual

POWER AVAILABILITY  
USER MANUAL  
PowerSure™ PST  
500-650 VA  
230V  
 
Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
Battery Charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
Inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
Maintaining Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Guide to Status Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Troubleshooting Chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16  
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
Battery Run Times. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
i
 
 
IMPORTANT SAFETY INSTRUCTIONS  
SAVE THESE INSTRUCTIONS  
This manual contains important safety instructions that should be fol-  
lowed during the installation and maintenance of the Uninterruptible  
Power System (UPS) and its batteries. Please read this manual thor-  
oughly before attempting to install or operate this UPS.  
Read all safety, installation, and operating instructions before operat-  
ing the UPS. Adhere to all warnings on the unit and in this manual.  
Follow all operating and user instructions.  
This equipment is designed for Commercial, Industrial or Home use.  
Liebert Corporation neither recommends nor knowingly sells this  
product for use in life support applications or with other designated  
critical devices.  
This equipment can be installed and operated by individuals without  
previous training.  
WARNING  
!
SAFETY PRECAUTIONS  
• There are no user-serviceable parts inside this UPS. Refer  
all UPS and battery service to qualified service personnel.  
Do not attempt to service this product yourself.  
• Output receptacles on the UPS are electrically live if the  
UPS is switched on, even if the UPS is not plugged into a  
Mains supply. The ON/OFF button on the UPS does not elec-  
trically isolate the internal parts. Some components are live  
even when Mains power is disconnected. To isolate the UPS,  
switch off the UPS first, then unplug it from the Mains.  
• Opening or removing the cover may expose you to lethal  
voltages within this unit even when it is apparently not  
operating and the input wiring is disconnected from the  
electrical source.  
• Observe all CAUTION and WARNING statements in this  
manual and on the unit. Failure to do so may result in  
serious injury or death.  
• Never work alone.  
• This UPS should not be supplied from electrical power sys-  
tems of the “IT” (Impedance á Terre) type (IEC 364 - Elec-  
trical Installation of Buildings).  
• The UPS must be earthed/grounded at all times during  
operation. Connect only to a mains supply socket outlet  
with an earth/ground connection.  
1
 
 
CAUTION  
!
Although your UPS has been designed and manufactured to  
assure personal safety, improper use may result in electrical  
shock or fire. To ensure safety, please observe the following  
rules:  
• Turn off and unplug your UPS before cleaning. Do not use  
liquid or aerosol cleaners. A dry cloth is recommended to  
remove dust from the surface of your UPS.  
• Do not install or operate your UPS in or near water.  
• Do not place your UPS on an unstable cart, stand or table.  
• Do not place your UPS in direct sunlight or near heat  
emitting sources.  
• Never block or insert any objects into the ventilation holes  
or other openings of the UPS. Keep all vents free of dust  
accumulation that could restrict airflow.  
• Do not place UPS power cord in any area where it may be  
damaged by heavy objects.  
• Placing magnetic storage on the top of the UPS may result  
in data corruption.  
CAUTION  
!
BATTERY HANDLING PRECAUTIONS  
Servicing of batteries should be performed or supervised by  
personnel knowledgeable of batteries and required  
precautions. Keep unauthorized personnel away from the  
batteries.  
A battery can present a risk of electrical shock and high  
short-circuit current. The following precautions should be  
observed when working on batteries:  
• Remove watches, rings, and other metal objects.  
• Use tools with insulated handles.  
• Do not dispose battery or batteries in a fire. The battery  
may explode.  
• Do not open or mutilate the battery or batteries. Released  
electrolyte is harmful to skin and eyes. It may be toxic.  
• When replacing the battery, use same number and type of  
battery as the suitable recommended type of battery listed  
in specification table in back of this manual.  
• Handle, transport and recycle batteries in accordance with  
local regulations.  
2
 
CAUTION  
!
If your UPS demonstrates any of the following conditions,  
turn off and unplug your UPS from the outlet and contact  
your local dealer, Liebert representative, or Liebert  
Worldwide Support Group.  
• The power cord is damaged.  
• Liquid has been spilled on the UPS.  
• The circuit breaker or fuse opens frequently.  
• The UPS does not operate in accordance with the user  
manual.  
Electromagnetic Compatibility—The PowerSure™ PST series  
complies with the requirements of the EMC Directive 89/336/EEC and  
the published technical standards. Continued compliance requires  
installation in accordance with these instructions and use of Liebert  
approved accessories only.  
Environmental—Operate the UPS in an indoor environment only in  
an ambient temperature range of 0°C to 40°C (32°F to 104°F). Install  
in a clean environment, free from conductive contaminates, moisture,  
flammable liquids, gases, or corrosive substances.  
Provided is a USB cable for connection to a computer. Store in a safe  
place if not required at this time.  
3
 
INTRODUCTION AND SYSTEM DESCRIPTION  
Congratulations on your choice of the Liebert PowerSure™ PST Unin-  
terruptible Power System (UPS). It provides filtered AC power to sen-  
sitive electronic equipment and other critical loads.  
The PowerSure PST is an off-line UPS designed for desktop applica-  
tions. It provides perfect one-to-one power protection for electronic  
equipment such as PCs, point-of-sale displays, home office equipment  
and similar electronic gear. The PowerSure PST is available in two (2)  
sizes: 500 and 650VA at 230VAC.  
PowerSure PST models are available for 120VAC and 230VAC supply  
voltages and loads. Please verify that this model matches your AC  
Mains and load voltage requirements.  
4
 
 
Top and Side Views of UPS  
Black output receptacles  
Surge protection only  
AC Inlet  
TOP OF UPS  
Mains/Battery Indicator  
(Green)  
Fault Indicator (Red)  
Orange output receptacles  
Battery backup + surge protection  
RIGHT SIDE OF UPS  
USB interface  
port (for  
PAXXX-230U  
models only)  
LEFT SIDE OF UPS  
Data Line  
Protection  
Connectors  
(IN, OUT, OUT)  
Phone/Fax/DSL/  
Internet/Modem  
Devices  
Refer to Bottom for  
Cautionary Markings  
Circuit Protector  
5
 
 
MAJOR COMPONENTS  
Input  
Output  
L
TVSS &  
EMI/RFI  
Filters  
Transfer  
Switch  
L
Battery  
Charger  
Battery  
Inverter  
N
G
N
G
Transient Voltage Surge Suppression (TVSS) & EMI / RFI  
Filters  
These UPS components provide surge protection and filter electro-  
magnetic interference (EMI) and radio frequency interference (RFI).  
They minimize surges or interference present in the mains line and  
keep the sensitive equipment protected.  
Transfer Switch  
In Normal mode the Transfer Switch passes mains AC power to the  
connected load. When input mains voltage or frequency is outside  
acceptable limits, the transfer switch activates and transfers the UPS  
to battery.  
Battery Charger  
In Normal mode, the Battery Charger converts mains AC power into  
regulated DC power to float charge the battery. It is continuously  
charging the battery whenever the UPS is plugged into a power outlet  
and mains power is within acceptable limits—even if the UPS is  
turned OFF.  
Battery  
The PowerSure PST utilizes a valve-regulated, nonspillable, lead acid  
battery. To optimize battery life, operate the UPS in an ambient tem-  
perature of 20°-25°C (68°-77°F).  
Inverter  
When mains power fails, the Inverter draws energy from the battery  
and inverts it into a regulated stepped sinewave supplying power for  
equipment connected to the orange receptacles.  
6
 
           
WHATS INCLUDED  
The PowerSure PST is shipped with the following items:  
• PowerSure PST user manual  
• USB cable (PAXXX-230U models only), 1.8m (6 ft.)  
• RJ-11 cord, 2.1m (7 ft.)  
• Two (2) 10A output power cords, 2.0m (6.6 ft.)  
USB cable  
PowerSure PST  
1.8m (6 ft.)  
(for PAXXX-230U  
models only)  
Two (2) 10A  
RJ-11 cord  
output power cords  
2.1m (7 ft.)  
2.0m (6.6 ft.)  
7
 
 
INSTALLATION  
This UPS is designed for data processing equipment. Maximum load  
must not exceed that shown on the UPS rating label. Do not connect  
equipment that could overload the UPS or draw half-wave current  
from the UPS, for example: electric drills, vacuum cleaners, laser  
printers or hair dryers. Your total load earth leakage current must not  
exceed 3.5 mA. Most data processing equipment meets this require-  
ment if you use no more than two pieces of equipment. If uncertain  
about your load, consult your local dealer, Liebert representative, or  
Liebert Worldwide Support Group.  
1. Visually inspect the UPS for freight damage. Report damage to the  
carrier and your local dealer, Liebert representative or the Liebert  
Worldwide Support Group.  
2. Decide where to place the PowerSure PST. Install the UPS indoors  
in a controlled environment, where it cannot be accidentally turned  
off. Place it in an area of unrestricted airflow around the unit, away  
from water, flammable liquids, gases, corrosives, and conductive  
contaminants. Maintain an ambient temperature range of 0°C to  
40°C (32°F to 104°F).  
NOTE  
UPS operation in temperatures above 25°C (77°F) reduces  
battery life.  
Plug this type of equipment into black  
receptacles ONLY.  
Inkjet  
Printer  
Scanner  
FAX  
Machine  
Plug computers, monitors & network hubs  
into orange receptacles.  
3. The PowerSure™ PST 230VAC models are not supplied with an  
input power lead for connection to the mains supply. Additional  
input/output leads can be obtained from your dealer.  
8
 
 
4. Shut down the load equipment and turn off the mains supply.  
Unplug the load equipment’s power input cable from the mains sup-  
ply socket and plug it into the UPS input socket. Plug the power  
input cable into the mains supply socket.  
Connect the supplied output cable between the load equipment  
input socket and one of the UPS AC output sockets. Connect all load  
equipment to the UPS in this manner.  
5. Plug any computers and monitors into the orange battery backed up  
receptacles.  
Other office machines that do not exceed the capacity of the UPS—  
inkjet printers, scanners and fax machines—may be plugged into  
either of the two (2) black receptacles, which provide surge protec-  
tion only.  
6. Connect Phone/Fax/DSL/Internet/Modem devices to data line con-  
nectors.  
om for  
arkings  
7. Press and release the ON/OFF/Alarm Silence button to turn on the  
UPS. The UPS will beep and the Mains/Battery Indicator will illu-  
minate (green).  
8. Turn on connected equipment.  
9. If your PST has the optional USB port (available on models with  
extension “-230U”):  
Connect the USB cable provided with the UPS to the USB ports on  
the PST and your computer. The PST will work automatically with  
your built-in power management software on Windows XP and 2000  
and Mac OS 10.2 or later (see USB Interface Port section for  
details).  
NOTE  
When using the communication features on this UPS, ensure  
the cabling connected to the UPS communications ports are  
kept separated from the power leads to the UPS input and  
output.  
9
 
CONTROLS AND INDICATORS  
ON/OFF/Alarm Silence Button  
This button controls output power to the  
connected load and has three functions:  
• ON  
• OFF  
• Alarm Silence  
ON/OFF/Alarm Silence  
ON  
When the UPS is off, pressing the main ON/OFF button for  
more than two seconds will start the UPS, and an audible  
alarm sounds briefly. The UPS is capable of starting on bat-  
tery (battery start).  
OFF  
When the UPS is on (in either Normal or Battery mode),  
pressing the main ON/OFF button for more than  
two (2) seconds will shut down the UPS. An audible alarm  
sounds briefly.  
Alarm When a UPS audible alarm is active, pressing and releasing  
Silence the main ON/OFF button will silence the active audible  
alarm, whether mains power is present or not. Once the  
alarm silence function has been activated, all active audible  
alarms—except for low battery or overload conditions—will  
remain silenced until a new alarm condition is detected.  
NOTE  
Do not hold ON/OFF button down for more than 2  
seconds or the UPS will shut down.  
10  
 
   
Status Indicators: Mains/Battery, Fault  
There are two (2) status indicators on the top panel of the UPS, as  
shown in the diagram below. Each indicator illuminates to specify the  
status of the UPS (see Troubleshooting section for details).  
Mains/Battery Indicator (Green)  
The Mains/Battery Indicator illuminates when the UPS is operating  
in Normal mode, supplying power to connected loads. The Mains/Bat-  
tery Indicator flashes when the UPS is operating in Battery mode.  
Fault Indicator (Red)  
The Fault Indicator illuminates when the UPS detects an internal  
fault. It flashes if the UPS detects an overload condition.  
Location and Status of Indicators  
Mains/Battery Indicator (Green)  
Fault Indicator (Red)  
11  
 
       
MODES OF OPERATION  
Normal Mode  
During Normal mode operation, the Power-  
Sure PST supplies conditioned, computer-  
grade power to the connected equipment:  
mains power passes through the TVSS cir-  
cuitry, EMI/RFI filters and then through the  
Transfer Switch to the connected equipment.  
-
+
Continuous indicator  
illumination denotes  
Normal Mode  
When the UPS is in Normal mode, the  
Mains/Battery Indicator illuminates green.  
The PowerSure PST continuously monitors the batteries to maintain  
them in a fully charged state. The battery charger operates whenever  
AC power is present, even if the UPS is switched off. The UPS per-  
forms an automatic battery test after it has been operating continu-  
ously for two (2) weeks.  
Battery Mode  
The UPS switches to Battery mode in the  
-
+
event of an extreme voltage/frequency condi-  
tion or complete mains failure. The battery  
system supplies power through the Inverter to  
When the UPS is in Battery mode, the Mains/  
Battery Indicator flashes green and an alarm  
sounds every 5 seconds.  
Flashing indicator  
illumination denotes  
Battery Mode  
When a low battery condition occurs, the Battery Indicator continues  
to flash green and the alarm sounds every half-second. Low battery  
warning is initiated when approximately two (2) minutes of battery  
run time are remaining. For more information, refer to Trouble-  
shooting section.  
CAUTION  
!
Turning off the UPS while in either Normal mode or Battery  
mode will result in the loss of output power.  
NOTE  
Once mains power is restored, the UPS resumes normal  
operation. At this time, the battery charger begins recharging  
the battery. The UPS is capable of OFF-State charging, i.e.,  
with mains power, the UPS will charge the batteries as long  
as it is plugged in.  
12  
 
     
COMMUNICATIONS  
USB Interface Port  
The PowerSure PST models with extension “-230U” have a USB inter-  
face port for communication that will work with the built-in Microsoft  
Power Manager software on the user’s PC, if the PC is so equipped. It  
will provide UPS status and manages the automatic, orderly shut-  
down of the computer. The UPS (USB) communications meets HID  
standard, version 1.11. All USB models are compatible with Microsoft  
Windows 2000, Windows XP and Mac OS 10.2 or later. All USB mod-  
els ship with a 1.8m (6 ft.) USB cable.  
Microsoft, Windows, and the Windows logo  
are trademarks, or registered trademarks of  
Microsoft Corporation in the United States  
and/or other countries.  
Data Line Protection Connectors  
Data line (1 input & 2 outputs) connectors are located on the rear of  
the UPS and provide transient voltage surge suppression (TVSS) for  
Phone/Fax/DSL/Internet/Modem devices.  
13  
 
     
MAINTENANCE  
The PowerSure PST UPS requires very little maintenance. Follow  
these practices to prevent problems.  
Cleaning the UPS  
The following will help ensure trouble-free operation for years:  
• Vacuum dust from the ventilation intake occasionally.  
• Wipe the cover periodically with a dry cloth.  
Maintaining Batteries  
The batteries are valve-regulated, nonspillable, lead acid and must be  
kept charged to retain their design life. The UPS continuously charges  
the batteries when connected to the mains supply, even while the UPS  
is switched off.  
When storing the UPS, it is recommended to plug in UPS for at least  
24 hours every four to six months to ensure full recharge of the batter-  
ies.  
14  
 
     
TROUBLESHOOTING  
The information below indicates various symptoms a user may  
encounter in the event the PowerSure PST experiences a problem. Use  
this information to determine whether external factors caused the  
problem. See Troubleshooting Chart for suggested remedy.  
1. The Fault Indicator illuminates, indicating  
the UPS detected a problem.  
2. An alarm sounds, alerting that the UPS  
requires attention. The alarm can be  
silenced except for low battery and overload  
warning conditions.  
3. Mains/Battery Indicator may be illuminated  
as a diagnostic aid to the operator, as shown  
below:  
Fault  
Indicator  
Mains/  
Battery  
Indicator  
Guide to Status Indicators  
Fault  
(Red)  
Mains/Battery  
(Green)  
Diagnosis/  
Audible Alarm  
-
+
!
Normal Mode  
UPS is operating in Normal Mode; no  
beep.  
ON  
Battery Test has been initiated; no  
beep.  
Flashing  
ON  
The unit is overloaded; beep every  
half-second  
Flashing  
ON  
ON  
The UPS has failed; continuous beep  
Unit has shutdown due to overload;  
continuous beep  
Flashing  
ON  
The UPS shutdown due to failure;  
continuous beep  
Battery Mode  
The UPS is operating in Battery mode;  
beep every 5 seconds.  
Flashing  
Flashing  
Flashing  
UPS battery is low; beep every  
half-second  
The unit is overloaded; beep every  
half-second  
Flashing  
ON  
Flashing The UPS has failed; continuous beep  
15  
 
   
Troubleshooting Chart  
If the UPS fails to operate properly, turn off the unit and repeat the  
steps in the Installation section of this manual. If the problem per-  
sists, refer to the chart below:  
Problem  
Cause  
Solution  
Check the circuit protector on the side  
of the UPS. If it is tripped, reset it and  
restart the UPS.  
For further help, call your local dealer,  
Liebert representative or the Liebert  
Worldwide Support Group.  
UPS will not  
start  
Overload/  
Short circuit  
UPS not plugged in  
Plug in power cord securely.  
Circuit protector  
tripped  
Reset the circuit protector and restart  
the UPS.  
Power not available  
at mains receptacle  
Have the mains receptacle checked  
by a qualified electrician.  
UPS starts  
on battery,  
but will not  
switch to AC  
Wait until the voltage rises to an  
appropriate level or have the mains  
receptacle checked by a qualified  
electrician.  
Input voltage below  
threshold  
Wait until voltage lowers to an  
appropriate level or have the mains  
receptacle checked by a qualified  
electrician.  
AC overvoltage  
Overload/  
Short circuit  
Check the circuit protector on the rear  
of the UPS. If it is tripped, reset it and  
restart the UPS.  
If the problem persists, disconnect  
some of the equipment from your  
UPS—the total wattage of your  
equipment must not exceed the  
capacity of the UPS. For further help,  
call your local dealer, Liebert  
representative or the Liebert  
Worldwide Support Group.  
UPS shuts  
down, Fault  
Indicator lit  
Internal UPS fault  
Overload  
Reduce load.  
UPS not  
providing  
expected  
backup time  
Battery not charged  
due to a recent  
outage  
Recharge battery.  
16  
 
 
SPECIFICATIONS  
PA500-230U  
PA500-230  
PA650-230U  
PA650-230  
Model Number  
Model Rating VA / W  
500 / 300  
650 / 360  
DIMENSIONS: mm (in.)  
Unit  
W x D x H  
168 x 250 x 95  
(6.6 x 9.8 x 3.7)  
168 x 250 x 95  
(6.6 x 9.8 x 3.7)  
Shipping  
W x D x H  
238 x 350 x 142  
(9.4 x 13.8 x 5.6)  
238 x 350 x 142  
(9.4 x 13.8 x 5.6)  
WEIGHT: kg (lbs)  
Unit  
4.7 (10.4)  
5.7 (12.5)  
5.7 (12.5)  
6.7 (14.8)  
Shipping  
INPUT AC PARAMETERS  
Surge Protection  
Rated Input Voltage  
220J  
230VAC  
Voltage Range Without  
Battery Operation  
180VAC - 264VAC (±6VAC)  
47 - 63 Hz (±0.4 Hz)  
Frequency  
OUTPUT AC PARAMETERS  
(3) IEC-320-C13 (orange)  
battery backup+surge protection  
(2) IEC-320-C13 (black)  
surge protection  
Output Receptacles  
2m (6.6 ft) detachable, w/IEC-320 (Wire Type: 1mm2,  
H05W-F 3G)  
Output Cord  
Voltage (Battery Mode)  
Output Current  
230VAC (±8%)  
2.9 A  
4.2 A  
Waveform (Battery Mode)  
Frequency (Battery Mode)  
Overload Warning  
Stepped Sinewave  
50/60 Hz (±1 Hz)  
>100%  
Overload Shutdown  
BATTERY PARAMETERS  
Type  
>110%  
Valve-regulated, nonspillable, lead acid  
1 x 12V x 5 Ah 1 x 12V x 7 Ah  
Quantity x Voltage x Rating  
Transfer Time  
4 – 6 ms typical  
At 25°C (77°F), resistive loading,  
w/ fully charged batteries:  
Back-up Time:  
Full load  
Half load  
2 minutes  
8 minutes  
1 minute  
8 minutes  
12 hours to 90% rated capacity, after full discharge  
into resistive load  
Recharge Time  
17  
 
 
ENVIRONMENTAL  
Operating Temperature  
Storage Temperature  
Relative Humidity  
Operating Elevation  
Audible Noise  
AGENCY  
0°C to +40°C (+32°F to + 104°F)  
-15°C to +50°C (+5°F to + 122°F)  
0% to 95%, non-condensing  
Up to 3000 m (10,000 ft.) at 35°C (95°F) w/o derating  
< 40 dBA, at 1 meter  
Safety  
EN50091-1-1, TUV/GS listed, CE Compliance Mark  
EN61000-4-5, Level 3, Criteria A  
Surge  
ESD  
EN61000-4-2, Level 3, Criteria A  
Susceptibility  
EN61000-4-3, Level 2, Criteria A  
Electrical Fast Transient/  
Burst  
EN61000-4-4, Level 3, Criteria A  
Emissions  
EN50091-2, Class B  
EN61000-3-2  
Harmonics  
Conducted Immunity  
Flicker  
EN61000-4-6  
EN61000-3-3  
Transportation  
ISTA Procedure 1A  
Battery Run Times  
Load %  
5
500VA  
650VA  
95  
53  
25  
19  
12  
8
117  
73  
35  
20  
12  
8
10  
20  
30  
40  
50  
60  
7
7
70  
5
4
80  
3
3
90  
3
2
100  
2
1
Note: Approximate discharge times are in minutes and  
at 25°C (77°F) with resistive load.  
18  
 
 
 
POWER AVAILABILITY  
PowerSure™ PST  
USER MANUAL  
Technical Support/Service  
The Company Behind the Products  
Web Site  
Monitoring  
800-222-5877  
With over a million installations around the globe,  
Liebert is the world leader in computer protection  
systems. Since its founding in 1965, Liebert has  
Outside the US: 614-841-6755  
developed  
a
complete range of support and  
protection systems for sensitive electronics:  
Single-Phase UPS  
800-222-5877  
Environmental systems—close-control air  
conditioning from 1 to 60 tons  
Power conditioning and UPS with power  
ranges from 300 VA to more than 1000 kVA  
Integrated systems that provide both  
Outside the US: 614-841-6755  
Three-Phase UPS  
800-543-2378  
Environmental Systems  
environmental and power protection in  
single, flexible package  
a
800-543-2778  
Outside the United States  
Monitoring and control—from systems of any  
size or location, on-site or remote  
Service and support through more than 100  
service centers around the world and a 24/7  
Customer Response Center  
614-888-0246  
Locations  
United States  
1050 Dearborn Drive  
P.O. Box 29186  
Columbus, OH 43229  
While every precaution has been taken to ensure  
the accuracy and completeness of this literature,  
Liebert Corporation assumes no responsibility and  
disclaims all liability for damages resulting from use  
of this information or for any errors or omissions.  
Italy  
Via Leonardo Da Vinci 8  
Zona Industriale Tognana  
35028 Piove Di Sacco (PD)  
+39 049 9719 111  
Fax: +39 049 5841 257  
Asia  
23F, Allied Kajima Bldg.  
138 Gloucester Road  
Wanchai  
© 2003 Liebert Corporation  
All rights reserved throughout the world.  
Specifications subject to change without notice.  
Hong Kong  
+852 2 572 2201  
Fax: +852 2 831 0114  
® Liebert and the Liebert logo are registered  
trademarks of Liebert Corporation. All names  
referred to are trademarks or registered  
trademarks of their respective owners.  
SLI-23275 (2/03) Rev. 0  
 

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