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                      INTRODUCTION                          

Thank you for purchasing a Belkin Uninterruptible Power Supply 
(UPS). Each year, several natural and man made occurrences put 
the power supplied to your electronics in your home or office in 
jeopardy. At risk are your hardware, software and data because of 
these power problems.     

              IMPORTANT SAFETY INSTRUCTIONS                          

Please save this manual! 

It contains important operating instructions and warranty information 
pertaining to your UPS. 
 

Please save or recycle the packaging materials! 

The UPS packaging was designed with great care to provide 
protection during shipment and delivery. These materials are 
invaluable if you ever have to return the UPS for service. Damage 
sustained during transit is not covered under the warranty. 

 
Federal Communications Commission Interference Statement

 

This equipment has been tested and found to comply with the limits 
for a Class B digital device, pursuant to Part 15 of the FCC Rules. 
These limits are designed to provide reasonable protection against 
harmful interference in a residential installation. This equipment 
generates, uses and can radiate radio frequency energy and, if not 
installed and used in accordance with the instructions, may cause 
harmful interference to radio communications. To assure continued 
compliance, use only shielded interface cables when connecting to 
computer or peripheral devices. Any changes or modifications not 
expressly approved by the party responsible for compliance could 
void the user’s authority to operate this equipment. 

                                              CONTENTS                                                           

You should have received the following: 
1 – UPS unit 
1 – Bulldog Plus Shutdown Software 
1 – USB Cable 
1 – Phone Line Cable 
1 – Coaxial Cable (only F6B550-USB model). 

                  SYSTEM REQUIREMENTS                        

The UPS can be used without the software and can be used with 
any computer using up to a 17” CRT or LCD monitor. Also, you do 
not have to have the software installed to utilize the battery backup 
outlets. 

To fully utilize the UPS and its software, your computer must be able 
to operate the following operating systems: Windows98/ ME /NT4 / 
2000 /2003 /XP and have a USB port. 

              UPS FEATURES AND FUNCTIONS                              

Before installation, please inspect the UPS upon receipt. Make sure 
that nothing is damaged. 

Your UPS features 3 LED indicators. Each is marked by a power icon; 
please familiarize yourself with this chart, as it will assist you in the 
use of your UPS. (See #4 on Diagram 1) 

Chart 1 

 

 

 

 

 

 

 

   

 
 
 
 
 
 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

                                                  TOP PANEL                                                             

                                                         

 

 

 

 

Diagram 1 

1. 

 

SURGE Protected outlets (See #1 on Diagram 1) 

These outlets do not provide power during a power outage.   

Do not plug any surge protectors or power strips into the battery 

back-up outlets (i.e. daisy chaining).   
Equipment such as computer peripherals, printers, fax machine’s, 

or a desk lamp may be plugged into these outlets. The On/Off 

button does not control these outlets.

 

2. 

 

UPS Outlets (See #2 on Diagram 1) 

These outlets are your battery back up outlets. We strongly 

recommend that only sensitive equipment such as your computer 

and monitor should be plugged into these outlets.   

Caution 

  Never connect a laser printer or scanner to the 

backup outlets of UPS with other computer equipment. A 

laser printer or scanner draws significantly more power when 

in use than when sitting idle. This may overload the UPS. 

 

 

Should a power outage occur, your battery backup would 

automatically turn on Power (utility or battery) is not supplied to 

these outlets when the UPS is switched off. 

 

3. 

The On/Off button has 4 functions: (See #3 on Diagram 1) 

1. Turns on the UPS. Depress button at least 2 seconds. The 

green light will come on. 

2. Cold start function. Assuming the battery is charged the UPS 

will work without it being plugged into an outlet. Depress and 
hold the key for at least 2 seconds to turn on the UPS.   

3. Silence function. During “On Battery Mode”, the audible sound 

can be turned “ON” or “OFF” by depressing the switch less than 
1.5 seconds. 

4. Battery test function. During “ON Line Mode”, depressing the 

switch less than 1.5 seconds and the UPS performs a battery 
test in back up mode. 

                                                      SIDE PANEL                                                   

     

AC Input

 Phone/Fax/Modem Protection 

Circuit Breaker
Push to Reset

Refer to Bottom for 
Cautionary Marking

OUT

OUT

IN              

IN              

OUT

#1

#4

#3

#2

#5

 

Diagram 2 

1.  AC Input Power Cord (See #1 on Diagram 2) 

 

Provides power to your UPS. 

2.  Audio/ Video surge protection port (see #2 on Diagram 2) 

  (Only F6B550-USB model) 

The Audio/ Video cable is surge protected. There is one input port 
and one output port. 

3.  Phone/ Fax/ Modem Surge Protection (See #3 on Diagram 2) 

The Phone/ Fax/Modem lines are surge protected. There is one 
input jack and two output jacks.    This allows you to split one 
telephone connection to two separate devices.   

4.  AC Breaker (Circuit Breaker; See #4 on Diagram 2) 

Should a power overload occur, the circuit breaker would trigger 
the UPS to turn off AC power.    In order to restore the power, 
depress the circuit breaker button to reset, then depress the 
Power button.   

5.  USB communication port (see #5 on Diagram 2) 

Your UPS features a USB communication port. Installation of the 
cable and software is optional. This allows the UPS to connect to 
your computer. The Bulldog Software will not work if the UPS is 
not connected to you computer. This does not mean the battery 
backup feature will not work without the software and cable 
installed. The UPS will still provide backup power but you will be 
unable to utilize the data management capabilities of the software. 
 
 
 
 
 
 
 
 
 
 
 
 
 

                                                        ALARMS                                                             

BACK UP (Slow Alarm) 

When in “BACK UP” on battery mode, the YELLOW LED 
illuminates and the UPS emits an audible alarm. The alarm 
stops when the UPS returns to ONLINE normal operation. 

LOW BATTERY (Rapid Alarm) 

In “BACK UP” mode, when the battery energy runs low, the 
UPS beeps rapidly until the UPS shuts from a depleted battery 
or returns to LINE NORMAL operation. 

FAULT (10 Seconds Continuously) 

When the UPS occur fault, the UPS emits an audible alarm for 
10 seconds continuously to warn of a fault condition.   
Disconnect the equipment prior to checking the equipment. 

                                            INSTALLATION                                                           

Note!  

Before installation, please inspect the UPS Upon 
receipt. Make sure that everything inside the package 
is not damaged. 

A) Connect to AC Utility Power 

1. 

Connect the AC inlet to utility power via the 
power cord. Please make sure there are no 
devices plugged into the UPS unit. Check to 
see if the “Site Wiring Fault” indicator is lit or 
not. If it is lit, please have the utility wiring 
inspected by an electrician.   

B) Charge the Battery 

1. 

For best results, charge the battery for 8 hours prior to initial 
use. The UPS charges its battery whenever it is connected to 
the utility power.     

C) Turn on the UPS 

1. 

Turn on your UPS by depressing the On/Off button for 
approximately 2 seconds. You will see the green indicator light 
come on.   

D) Plug in Power Devices 

1. 

Plug your devices into the AC outlets on the UPS. To use the 
UPS as a master on/off switch, make sure all of the loads are 
switched on. 

Caution: Never connect a laser printer 

or scanner to the backup outlets of UPS 
with other computer equipment. A laser 
printer or scanner draws significantly 
more power when in use than when 
idles. This may overload the UPS. 

E) Connect the phone/ fax/ modem lines 

1. 

Connect a single phone / fax/ modem line into the surge 
protected sockets on the side of the UPS. The RJ-11 modular 
sockets accept standard single line telephone connections.   

 
2. 

Plug one end of the phone cable you received into your 
telephone wall jack and plug the other end into the jack marked 
IN. You may now plug a phone, fax or modem into the two 
jacks marked OUT. (See Diagram 3) 

 Phone/Fax/Modem Protection

OUT

OUT

IN

 

 

To Telephone Socket

Modem/ Fax

Phone

 

Diagram 3 

Note: 

This connection is optional but highly suggested as phone/ 

fax/ modem lines often carry dangerous surges and spikes. The 
UPS works properly without a phone/ fax/ modem connection. 

Caution: The phone/fax/modem protection feature could be rendered 
inoperable if improperly installed. Make sure that the telephone line 
from the wall is plugged into the connector marked “IN”, and the 
devices to be protected (phone/ fax/ modem) are plugged into the 
connector marked “ OUT”. 

 

F) Connect the CATV cable (see #2 on Diagram 2)   

(Only F6B550-USB model)   

1. 

Connect a single CATV cable into the surge protect port on 
the left of the UPS. The Audio/ Video modular port can 
accept the standard single cable of CATV connects. 

2. 

Plug one end of the CATV cable you received into your CATV 
wall port and plug the other end into the port marked IN. You 
can plug television into the one port marked OUT. 

Note: 

The UPS works properly without the Audio/ Video connection.

 

G) Connect the USB (Universal Serial Port) Communication 

port (see #5 on Diagram 2)

  

A USB port is provided to relay the signal to support Windows. To 

fully utilize the Bulldog Shutdown Software; you will need to 

connect the UPS to your computer. Connect the USB cable to 

your UPS then connect the other end to the USB port on your 

computer.

 

H) Install the Software (Optional)

 

a)  To fully utilize the UPS and its software, your computer must be 

able to operate the following operating systems: Windows98/ 
ME / NT4/ 2000/ 2003/ XP and have a USB port. 

b)  Your UPS features the Bulldog Plus Shutdown Software. This 

allows you   to protect and save your data should a power 
outage occur, as well as safely shutdown your computer in your 
absence. Please be sure to close out of all applications prior to 
installing the software. 

1. 

To install the software, please place the CD into the CD drive of 
your computer. 

2. 

Your computer should autorun the CD. If this does not occur, go 
to the Run feature on your Start icon (lower left corner) on your 
screen. Please enter the CD drive, it may be D: Upon entering 
the drive run setup.exe. to execute the software. Should you 
continue to have a problem, please refer to your computer’s 
owner’s manual for the correct drive.   

Indicator Condition 

Description 

 
 
ON-LINE 

О

 Solid 

Green 

The UPS is operating and 
supplying the utility power to 
connect loads. 

 Flashing 

Yellow 

   

 

When the UPS is operating from 

battery: 

 

1.   The light is blinking every 10 

seconds if the UPS is 

operating on battery mode. 

 

2.   The light illuminates rapidly 

every 1 second if the UPS’s 

battery is very nearly 

depleted.  

 

When the UPS is operating and 

supplying the utility power to 

connect loads, the LED and 

buzzer will flash and emit every 

1minute if the UPS’s battery 

needs to be replaced. 

 
 
 
 

 
 
 
 
 
*ON-BATTERY 
*LOW-BATTERY 
*REPLACE  

BATTERY 

*UPS Fault 

О

 Solid   

     

  Yellow 

The LED will start continuously 

and the buzzer will be beeping 

for 10 seconds if UPS fault is 

found. 

 
 
 

 
 

SITE WIRING 
FAULT 

О

 Solid 

Red 

The Site Wiring fault LED will 
illuminate when one of the 
following conditions exist:   
1.   Open or high resistance 

ground  

2.   Hot and neutral polarities 

reversal 

 

F6H375-USB
F6H550-USB
F6B550-USB

R

 

B

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 S

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rot

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S

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rge P

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#3

#2

#1

#4

Laser Printer 

                                                                         

BATTERY REPLACEMENT PROCEDURE                                                   

 

Fig. 1

   

 

Fig. 2

 

 

Fig. 3

 

 Fig. 4

 

Replacement requires removing the battery cover plate on the back or bottom of the UPS. No tools are needed. To replace the batteries: 

1. 

Remove the battery cover plate on the back of the UPS (Fig.1).

 

 

2. 

Disconnect the insulated connectors from the battery terminals (Fig.2) then put the battery wire into indentations. 

3. 

Remove the battery then insert a new battery pack, and push the connectors onto the battery terminals (Fig. 3) 

NOTE: There may be a small spark at the battery terminals when reconnecting the connectors. This is normal and will not harm you or the UPS. 

4. 

Close the battery cover (Fig. 4). 

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