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Precautions
Refer to the Technical Information for Limit Switches (Cat. No. C121).
■ Correct Use
When a rod or wired-type actuator is used, do not touch the top end
of the actuator. Doing so may result in injury.
Applicable models: WLHAL5 and WL01HAL5 Rod Spring Levers and
WLNJ-S2 and WL01NJ-S2 Steel-wire Actuators.
A short-circuit may cause damage to the Switch, so insert a circuit
breaker fuse, of 1.5 to 2 times the rated current, in parallel with the
Switch. In order to meet EN approval ratings, use a 10-A fuse that
corresponds to IEC269, either a gI or gG for general-purpose types
and spatter-prevention models only.
When wiring terminal screws, use M4 round crimp terminals and
tighten screws to the recommended torque. Wiring with broken
wires, or the incorrect crimp terminals, or not tightening screws to the
recommended torque can lead to short-circuits, leakage current, and
fire.
When performing internal wiring there is a chance of short-circuit,
leakage current, or fire, so be sure to protect the inside of the Switch
from splashes of oil or water, corrosive gases, and cutting powder.
Using an inappropriate connector or assembling Switches incorrectly
(assembly, tightening torque) can result in malfunction, leakage cur-
rent, or fire, so be sure to read the instruction manual thoroughly
beforehand.
Even when the connector is assembled and set correctly, the end of
the cable and the inside of the Switch may come in contact. This can
lead to malfunction, leakage current, or fire, so be sure to protect the
end of the cable from splashes of oil or water and corrosive gases.
Environmental Precautions
When the Switch is used in locations subject to splashes of water or
oil, the material of the seal, which ensures the sealing properties of
the Switch, may undergo changes in shape and quality. This is due to
deterioration (including expansion and contraction), and may result in
reduced performance, ineffective return, and ineffective sealing
(leading to ineffective contact, insulation, leakage current, and fire).
Confirm the possible effects of the operating environment on the
Switch before use.
Built-in Switch
Do not remove or replace the built-in switch. If the position of the
built-in switch moves, it can cause reduced performance, and if the
insulation sheet moves (separator), the insulation may become inef-
fective.
Tightening Torque
If screws are too loose they can lead to an early malfunction of the
Switch, so ensure that all screws are tightened using the correct
torque.
No.
Type
A
Head mounting screw
B
Cover mounting screw
C
Allen-head bolt
(for securing the lever)
D
Terminal screw
E
Connector
F
Main Unit screws
In particular, when changing the direction of the Head, make sure
that all screws are tightened again to the correct torque. Do not allow
foreign objects to fall into the Switch.
Installing the Switch
To install the Switch, make a mounting panel, as shown in the follow-
ing diagram, and tighten screws using the correct torque.
Standard/Overtravel model
Mounting holes
+0.2
Four, 5.2
dia. holes
0
Connectors
Either the easy-to-use Allen-head nut or the SC Connector can be
used as connectors. To ensure high-sealing properties, use the SC
Connector. Consult your OMRON representative for details on SC
Connectors.
Two-circuit Limit Switch
Torque
0.78 to 0.88 N·m
1.18 to 1.37 N·m
4.90 to 5.88 N·m
0.59 to 0.78 N·m
1.77 to 2.16 N·m
4.90 to 5.88 N·m
Overtravel model (side
installation)
Mounting holes
+0.2
Two, 5.2
dia. holes
0
WL
F-97
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