UNA SERIES
UNA350 Instruction Manual
Safety Warnings
Be sure to read the following precautions thoroughly before us-
ing this power supply unit and battery unit.
This instruction manual describes the important operating in-
structions that you should follow during installation and main-
tenance of the power supply unit (UNA350P) and the battery
unit (UNA-BT242R3).
Improper usage may cause electric shock, damage to the unit
or fire hazard.
Detailed description of the battery unit in this instruction man-
ual is based on the technical data and manual issued by the
batteries manufacturer.
cases when ambient temperature is more than 25℃, or many
times of discharging have been occurred, or high current
discharge has been generated, batteries lifetime becomes
short. (Lifetime is about 1.8 years at ambient temperature
40℃). Therefore short interval replacement is recommended.
Batteries used beyond their lifetime have a risk of smoke and
fire.
● Prolonged use of this equipment without regular replacement
of batteries might cause leakage of liquid from deteriorated
container of battery. As leaked liquid is contained with sul-
furic acid, it might cause smoke and fire. In case sulfuric
acid from the battery happens to come in contact with your
skin or eyes, immediately wash with running water and then
consult a doctor for medical care, otherwise you might be
burned skin or lose your eyesight.
Danger
● Never use this unit in places with flammable gas or ignitable
substances. There are risks of igniting these substances and
exploding by an arcing.
● Don’t short positive terminal and negative terminal of the
batteries with wire and so on.
● Never dispose of batteries of this product in a fire. There is
risk of exploding or blowing up.
● A small amount of gas is emitted from the battery. There is
not only concerns for bad influences to other equipment but
also the risk of exploding when arcing occur. Do not use this
product in a sealed room.
● Don’t disassemble or break up the battery.
● Battery unit can present a risk of electric shock or burn from
high short-circuit current. You may get burnt or become blind
by arcing or a leaked liquid.
Caution
● This power supply unit is designed for industry machines.
● Input voltage, output current, output power, ambient tempera-
ture and ambient humidity should be used within specifica-
tions, otherwise the unit will be damaged.
● The unit might be broken down by accident or unexpected
situation. For application equipment which requires very high
reliability (nuclear related equipment, traffic control equip-
ment, medical equipment, etc.), please provide fail safety
function in the equipment.
● Do not use in special environment such as strong electro-
magnetic field, gas etc, or any environment where conductive
foreign substance may enter.
● Cable for connecting battery should not be removed during
battery back up operation.
Connected devices and the instrument might be damaged.
● Do not remove the cover to change the variable resistor in-
side a power supply as this will cause failures.
● When carrying the body of this power supply unit and the
battery unit, be sure to hold the bottom side (side of the base
bracket) of it’s body. Do not hold cable as it may cause
damage.
Warning
● Don’t make unauthorized changes to power supply unit and
battery unit, otherwise damage may occur to your equipment
and void your warranty.
● There are high voltage and high temperature areas within this
product. If you touch that part, you may have electric shock
or burns.
● Keep your hands and face away from the unit, when unit is
operating. You may be injured by accident.
● Don’t use unit under unusual condition such as emission of
smoke or abnormal smell and sound etc. It might cause fire
and electric shock.
In such case, please contact us, don’t repair by yourself, as
it is dangerous for the user.
● Don’t insert anything from the aperture or drop the unit. It
might cause failure and fire, when using the unit under such
condition.
UNA
● Don’t operate these units at the condition of condensation.
It may cause fire and electric shock.
● This power supply unit has built-in blower for air-cooling.
Don’t block air intake and exhaust. It might cause fire.
● Don’t install the battery unit at places where it will be con-
tacted with water. It might cause electric shock or fire.
● Don’t short positive terminal and negative terminal of the
battery unit with wire and so on.
● Batteries are used in this equipment for short time power-
failure and etc. As lead and diluted sulfuric acid (thinned
sulfuric acid) are used in batteries, please pay special atten-
tion to handling of the battery unit.
● Don’t make an improper wiring to connectors. It may cause
damage.
● The output voltage of this power supply unit is considered
to be a hazardous energy level. (The voltage is 2V or more
and the electric power is 240VA or more.) Prevention from
direct contact with output terminal is highly necessary. While
installing or servicing this power supply unit, avoid dropping
tools by mistake or direct contact with output terminal. This
might cause an electric shock. While repairing this power
supply unit, the AC input power must be switched off and the
input and output voltage should be level.
● The life expectancy of batteries is shown in Chapter11 (Bat-
tery Life). Periodical replacement of batteries is required. In
・All specifications are subject to change without notice.
A-296
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