H7AN
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Safety Precautions
● Be sure to read the precautions for all Counters in the website at: http://www.ia.omron.com/.
Warning Indications
Meaning of Product Safety Symbols
•Make sure the proper product is specified for the application.
•For correct use, do not subject the timer to the following conditions.
•Dramatic temperature fluctuations
•High humidity or where condensation may occur
•Severe vibration and shock
•Where excessive dust, corrosive gas, or direct sunlight may be
present
•This product is not waterproof or oil resistance. Do not use the
product in any of the places subject to splashing liquid or oil
atmosphere.
•Use and store the product within the rated ranges given for the
product model you are using. If necessary, use forced cooling. If
the product is stored below −10°C, allow it to warm up for three
hours at room temperature before turning On the power supply.
•Do not cover the vent holes on the products and the area around
the product in order to ensure thermal dissipation.
•Wiring all terminals correctly.
•Do not wire the terminals which are not used.
•Use specified size crimped terminals (M3.5, thickness 7.2 mm
max.) for wiring with a gage of AWG 24 to AWG 18 (equal to a
cross section area of 0.205 to 0.823 mm2).
(The wiring stripping length is 5 to 6 mm.) Up to two wires of same
size and type, or two crimped terminals can be inserted into a
single terminal.
•Use this product within the rated power supply voltage and control
output.
•Use a switch, relay, or other contact to turn the power supply ON
instantaneously. If the voltage is applied gradually, the power may
not be reset or output malfunctions may occur.
•Interlock the power to the product with a relay so that the product
will not be left in an output on condition for long periods. Leaving
the product in an output-on condition for a month or longer,
especially in places with high temperatures, may result in
deterioration to internal parts, such as an electrolytic capacitor.
•Do not apply the supply voltage directly from external to transistor
output.
•A constant reading system is used in the present counter, so
settings can be changed while power is being supplied, but the
output will turn ON if the set value is set to the current
measurement value. (If a setting switch is accidentally touched
during operation, the set value will be changed and the new set
value will be used for operation. Always leave the front panel cover
closed unless you are changing a setting.)
•When changing the set count while power is being supplied, an
inadequate push of the thumb wheel switches will display two
numbers in one display window, causing the operating count to drift
widely.
Therefore, press the thumb wheel switches surely.
•Turn the power OFF first when removing the body from the case,
never touch the terminals or electronic components with your
hands or subject them to shock. When inserting the body, do not
allow electronic components to come in contact with the case.
•Static electricity may destroy internal components. When removing
the body form the case, do not touch an electronic components
other than the setting switches with your hands.
CAUTION
Indicates a potentially hazardous
situation which, if not avoided, may
result in minor or moderate injury or in
property damage.
Precautions for
Safe Use
Supplementary comments on what to
do or avoid doing, to use the product
safely.
Precautions for
Correct Use
Supplementary comments on what to
do or avoid doing, to prevent failure to
operate, malfunction or undesirable
effect on product performance.
Used to warn of the risk of electric shock under
specific conditions.
Used for general prohibitions for which there is no
specific symbol.
Used for general mandatory action precautions
for which there is no specified symbol.
CAUTION
Do not touch the terminals while power is being
supplied. Doing so many occasionally result in minor
injury due to electric shock.
Do not use the product where subject to flammable or
explosive gas.
Otherwise, minor injury from explosion may
occasionally occur.
Never disassemble, modify or repair the product or
touch any of the internal parts. Minor electric shock, fire,
or malfunction may occasionally occur.
The life expectancy of output relays varies considerably
with the output load and switching conditions. Always
consider the application conditions and use the output
relays within their rated load and electrical life
expectancy. If the output relays are used past their life
expectancy, contact fusing or burning may occasionally
occur. Also, never exceed the rated load current. When
using a heater, surely use a thermo switch in the load
circuit.
Tighten the terminal screws to between 0.74 and 0.90
N·m.
Loose screws may occasionally result in fire.
Do not allow pieces of metal, wire clippings, or fine
metallic shavings or filings from installation to enter the
product. Doing so may occasionally result in electric
shock, fire, or malfunction.
Precautions for Safe Use
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8or
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External
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