Oil-resistant, Robust, Compact Photoelectric Sensor
E3ZM-C
13
Safety Precautions
Refer to
Warranty and Limitations of Liability
on page 20.
This product is not designed or rated for direct-
ly or indirectly ensuring safety of persons. Do
not use it for such a purpose.
Do not use the product with voltage in excess
of the rated voltage. Excess voltage may result
in malfunction or fire.
Never use the product with an AC power sup-
ply. Otherwise, explosion may result.
When cleaning the product, do not apply a
high-pressure spray of water to one part of the
product. Otherwise, parts may become dam-
aged and the degree of protection may be degraded.
High-temperature environments may result in
burn injury.
The following precautions must be observed to ensure safe operation
of the Sensor.
Operating Environment
Do not use the Sensor in an environment where explosive or
flammable gas is present.
Connecting Connectors
Be sure to hold the connector cover when inserting or removing the
connector. Be sure to tighten the connector lock by hand; do not use
pliers or other tools. If the tightening is insufficient, the degree of
protection will not be maintained and the Sensor may become loose
due to vibration. The appropriate tightening torque is 0.39 to 0.49 N·m
for M12 metal connectors and 0.3 to 0.4 N·m for M8 metal connectors.
Load
Do not use a load that exceeds the rated load.
Low-temperature Environments
Do not touch the metal surface with your bare hands when the
temperature is low. Touching the surface may result in a cold burn.
Rotation Torque for Sensitivity Adjustment and Selector
Switch
Adjust with a torque of 0.06 N·m or less.
Environments with Cleaners and Disinfectants (e.g.,
Food Processing Lines)
Do not use the Sensor in environments subject to cleaners and
disifectants. They may reduce the degree of protection.
Modifications
Do not attempt to disassemble, repair, or modify the Sensor.
Outdoor Use
Do not use the Sensor in locations subject to direct sunlight.
Cleaning
Do not use thinner, alcohol, or other organic solvents. Otherwise, the
optical properties and degree of protection may be degraded.
Surface Temperature
Burn injury may occur. The Sensor surface temperature rises
depending on application conditions, such as the ambient
temperature and the power supply voltage. Use caution when
operating or performing maintenance on the Sensor.
Do not use the Sensor in any atmosphere or environment that
exceeds the ratings.
Do not install the Sensor in the following locations.
(1) Locations subject to direct sunlight
(2) Locations subject to condensation due to high humidity
(3) Locations subject to corrosive gas
(4) Locations where the Sensor may receive direct vibration or shock
Connecting and Mounting
(1) The maximum power supply voltage is 30 VDC. Before turning
the power ON, make sure that the power supply voltage does not
exceed the maximum voltage.
(2) Laying Sensor wiring in the same conduit or duct as high-voltage
wires or power lines may result in malfunction or damage due to
induction. As a general rule, wire the Sensor in a separate conduit
or use shielded cable.
(3) Use an extension cable with a minimum thickness of 0.3 mm
2
and
less than 100 m long.
(4) Do not pull on the cable with excessive force.
(5) Pounding the Photoelectric Sensor with a hammer or other tool
during mounting will impair water resistance. Also, use M3
screws.
(6) Mount the Sensor either using the bracket (sold separately) or on
a flat surface.
(7) Be sure to turn OFF the power supply before inserting or
removing the connector.
Cleaning
Never use thinner or other solvents. Otherwise, the Sensor surface
may be dissolved.
Power Supply
If a commercial switching regulator is used, ground the FG (frame
ground) terminal.
Power Supply Reset Time
The Sensor will be able to detect objects 100 ms after the power
supply is tuned ON. Start using the Sensor 100 ms or more after
turning ON the power supply. If the load and the Sensor are
connected to separate power supplies, be sure to turn ON the Sensor
first.
Turning OFF the Power Supply
Output pulses may be generated even when the power supply is OFF.
Therefore, it is recommended to first turn OFF the power supply for
the load or the load line.
Load Short-circuit Protection
This Sensor is equipped with load short-circuit protection, but be sure
to not short circuit the load. Be sure to not use an output current flow
that exceeds the rated current. If a load short circuit occurs, the output
will turn OFF, so check the wiring before turning ON the power supply
again. The short-circuit protection circuit will be reset. The load short-
circuit protection will operate when the current flow reaches 1.8 times
the rated load current. When using a capacitive load, use an inrush
current of 1.8 times the rated load current or lower.
Water Resistance
Do not use the Sensor in water, rainfall, or outdoors.
WARNING
CAUTION
Precautions for Safe Use
Precautions for Correct Use
