KEYENCE BL-N70 Series - Manual (Page 4)

2
Operating Precautions
CAUTION
z Operations
• Do not use a voltage other than 5V DC with the BL-N70 series. Doing so may
lead to breakdown on the unit. When using the dedicated power sources BL-
U1, BL-U2, or N-42 use a power supply within the appropriate range for each
communication unit.
• Be sure to turn the power off to devices attached to the BL-N70 series when
you plug or unplug the cables. Failure to do so may cause damage to the BL-
N70 series.
• Do not disassemble or modify the BL-N70 series. Doing so may lead to
breakdown on the unit.
• Keep the cables away from high-tension cables or power sources. Otherwise,
noise could cause malfunctions or accidents.
• The BL-N70 series passes the drop impact resistance test, but take care not
to expose the unit to excessive shock.
• Do not hold the BL-N70 series by its cable. The unit may become damaged.
z Cleaning
• Do not allow water, oil, dust, or other foreign substance to stick to the laser
emitter/receiver. This may cause read errors. When the BL-N70 series
becomes dirty or stained, clean the surface using an eyeglass cleaning cloth
or a soft cloth that has been dampened with a specialty cleaner for plastics
that can handle acrylic.
(Substances such as ethanol can make acrylics cloudy.)
z Operation Environment/Conditions
To use the BL-N70 series correctly and safely, avoid installing it in the following
locations. Failure to do so may cause fire, electric shock, damage, accidents, or
malfunctions.
• Locations where the BL-N70 series is exposed to direct sunlight
• Locations where the ambient temperature drops below 0°C or exceeds +40°C
• Locations where the ambient humidity goes outside of the range of 35 to 85%RH
• Locations where the temperature changes rapidly, causing condensation
• Locations where there are flammable or corrosive gases
• Locations where there is a large amount of airborne dust, salt, iron, and
greasy fumes
• Locations where the ambient lighting exceeds the regulation range
• Locations where the unit may be directly subjected to vibration or impact
• Locations where water, oil or chemicals may splash onto the unit
• Locations where a strong magnetic or electric field is generated.
z Procedures during Malfunction
Turn off the dedicated power source immediately in the following cases. Using the
unit in abnormal conditions could cause fire, electric shock, or accidents. Contact
your nearest KEYENCE office (listed at the end of the manual) for repair if :
• chemicals, debris, or liquids, including water, enter the BL-N70.
• the BL-N70 is damaged.
• smoke or abnormal odors are emitted from the BL-N70 series.
z For Obtaining the UL Certification
Use the NEC Class 2 output power supply for UL application.