WL-N/WLM-N
46
Safety Precautions
•Be sure to ground. If not, there is the possibility that electrical shock
occurs.
•Do not touch charged switch terminals while the switch has carry
current, otherwise there is the possibility that electrical shock
occurs.
•Do not disassemble the limit switch or touch inside of it under
supplying power, otherwise there is the possibility that electrical
shock occurs.
•Do not touch the wire or rod type actuator in order to prevent injury.
•Connect a fuse which has 1.5 to 2 times higher breaking current
than the switch rated current to the switch in series in order to
prevent the switch from short-circuit damage.
On the occasion when using the switch with GB ratings, use a 10A
fuse that complies IEC60269, either type gG.
•The durability of switch is depends on the operating condition.
Be sure to check the condition with actual using condition before
using, and use with the number of times of operating without a
performance problem.
•Do not drop the switch. Otherwise, there is the possibility that the
switch functions may be spoiled.
•Do not connect a Single Limit Switch to two power supplies that are
different in polarity or type.
•Be sure to keep the load current less than the rated value.
Otherwise, there is the possibility that the switch may be damage
and/or burnout.
•Minimum operating load: 5 VDC 1 mA, resistive load, P level
Note: The P level indicates the standard malfunction level at a
reliability level of 60% (λ60).
(JISC5003) λ60 = 0.1 × 10-6 per operation, which indicates an
estimated malfunction of 1 out of every 10,000,000 operations
at a reliability level of 60%.
•Do not use the Switch by itself in atmospheres containing
flammable or explosive gases. Arcs and heating resulting from
switching may cause fire or explosion.
•Be sure to prevent the foreign materials such like a scrapped cable
intrusion in to the switch when wiring. Otherwise, there is the
possibility of spoiling the normal operation.
•Never wire to the wrong terminals.
•Do not store or use the switch with following place.
Where the temperature fluctuates greatly
Where the humidity is very high and condensation may occur.
Where the vibration is too much
Where receiving direct sunshine.
Where receiving salty wind.
•Do not disassemble and/or modify the switch at anytime.
Otherwise, there is the possibility of spoiling the normal operation.
•Do not apply the force such like deformation and/or degeneration
to the switch. Otherwise, there is the possibility that the switch
functions may be spoiled.
Environment
•Take special care to use where there is fine powder, mud and/or
foreign materials stacking. And check the condition with actual
using condition before using. Then use without a performance
problem.
•Do not keep the Switch in locations with corrosive gas, such as
sulfuric gas (H2S or SO2), ammonium gas (NH3), nitric gas (HNO3),
or chlorine gas (Cl2), or high temperature and humidity. Otherwise,
contact failure or corrosion damage may result.
•Seal material may deteriorate if a Switch is used outdoor or where
subject to special cutting oils, solvents, or chemicals. Always
appraise performance under actual application conditions and set
suitable maintenance and replacement periods.
•Install Switches where they will not be directly subject to cutting
chips, dust, or dirt. The Actuator and Switch must also be protected
from the accumulation of cutting chips or sludge.
•Constantly subjecting a Switch to vibration or shock can result in
wear, which can lead to contact interference with contacts,
operation failure, reduced durability, and other problems.
Excessive vibration or shock can lead to false contact operation or
damage. Install Switches in locations not subject to shock and
vibration and in orientations that will not produce resonance.
•The Switches have physical contacts. Using them in environments
containing silicon gas will result in the formation of silicon oxide
(SiO2) due to arc energy. If silicon oxide accumulates on the
contacts, contact interference can occur. If silicon oil, silicon filling
agents, silicon cables, or other silicon products are present near
the Switch, suppress arcing with contact protective circuits (surge
killers) or remove the source of silicon gas.
Installing the Switch
•To install the Switch, make a mounting panel, as shown in the
following diagram, and tighten screws using the correct torque.
Precautions for Safe Use Precautions for Correct Use
Not Suitable Suitable
+0.2
0
+0.2
0
Front Mounting : Four, 5.2 dia. holes
or M5 tapped holes
Rear Mounting : Four, 6.2 dia. holes
±0.15
30.2
58.7±0.15