Panasonic HL-C2 Series, User Manual, Page: 11 / 278

Preface
9
Ambient humidity
Use the sensor within a range of 35 to 85% RH.
Avoid using it in places that may be exposed to dew condensation due to rapid
temperature change.
Ambient illuminance of light receiving surface
Use the sensor in locations where illuminance from incandescent lamps is
3,000 lx or less.
■ Power Supply Voltage
The power supply voltage should be within the rated voltage range of 21.6 to
26.4V DC.
■ Environment
• The internal circuit may be broken when the external surge voltage exceeds
500V [± (1.2×50) µs unipolar full wave voltage]. If there is danger of
external surge voltages exceeding 500V, install a surge absorber between the
power supply and input terminal.
• Keep the emitter surface and the receiver surface clean, not to attach light
refractors such as water, oil and fingerprints, or light blockers such as dust
and dirt. When cleaning these parts, wipe them off using a soft lint-free
cloth or lens cleaning paper.
• Install the sensor head at where extraneous light (such as sunlight or light
which has the same wavelength as laser beam) do not enter the receiver. If
high accuracy is required, install a light shield plate or the like on the sensor
head.
• Do not use the product in dusty places or that exposed to flammable or
corrosive gases, droplet, direct sunlight, severe vibration or impact.
Protective Structure
• The sensor head has protection against immersion, while the controller and
connectors are not structurally dustproof, waterproof, or corrosion-resistant.
Do not use the product underwater or in the rain.