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Application Precautions 3
Observe the following precautions when using the V520 Bar Code Reader.
• Use and store the V520 Bar Code Reader within the specified tempera-
ture and humidity ranges. If there is a possibility of the ambient tempera-
ture rising to a temperature above the specified temperature range, take
steps, such as installing fans, to cool the V520 Bar Code Reader. If the
V520 Bar Code Reader is installed incorrectly, heat will build up inside,
shortening the life of the V520 Bar Code Reader. If heat buildup is a prob-
lem, use forced cooling, e.g., install a cooling fan.
• Do not touch the patterns or components on a board with your bare
hands. Hold it by the case.
• To allow heat to escape, do not block the area around the V520 Bar Code
Reader. (Ensure that enough space is left for the heat to escape.) Do not
block the ventilation holes on the casing.
• Use the V520 Bar Code Reader within the specified power supply voltage
and rated load ranges.
• Wire properly using the correct terminal polarity.
• Make sure that the rated voltage is reached within 2 seconds after the
power supply is turned ON.
• Attach a surge suppressor or noise filter to peripheral devices that gener-
ate noise (in particular, motors, transformers, solenoids, magnetic coils or
other equipment that have an inductance component). When mounting a
noise filter on the power supply, be sure to first check the filter's voltage
and current capacity, and then mount the filter as close as possible to the
V520 Bar Code Reader. Allow as much space as possible between the
V520 Bar Code Reader and devices that generate powerful high-fre-
quency noise (e.g., high-frequency welders, high-frequency sewing
machines) or surges.
• To reduce induction noise, separate the high-voltage or large-current
power lines from other lines, and avoid parallel or common wiring with the
power lines when you are wiring to the terminals. We recommend using
separating pipes, ducts, or shielded lines.
• Install a switch or circuit breaker in a location easily accessible to the
operator and label it appropriately.
• Do not use the V520 Bar Code Reader in the following places:
• Places subject to dust or corrosive gases (in particular, sulfide gas and
ammonia gas)
• Places subject to high humidity, condensation or freezing
• Places subject to direct sunlight
• Places subject to vibration and large shocks
• Places subject to splashing liquid or oily atmosphere
• Places directly subject to heat radiated from heating equipment
• Places subject to intense temperature changes
• Cleaning: Do not use paint thinner or the equivalent. Use standard grade
alcohol to clean the V520 Bar Code Reader.
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