Two-circuit Limit Switch/Long-life Two-circuit Limit Switch
WL-N/WLM-N
Select the Best Two-circuit Switch for the
Operating Environment and Application
from a Wide Range of Models
• A wide selection of models is available, including
general-purpose, environment-resistant,
and
spatter-
prevention
switches.
• Standard-feature gold-clad crossbar contacts provide
high reliability.
•
Applicable to either standard loads or microloads.
• Switches with
lever actuators
provide 90° overtravel,
one-side operation, and four-direction head mounting.
• Approved standards: EN/IEC, UL, cUL, and CCC.
Contact your OMRON representative for information on
approved models.
Be sure to read
Safety Precautions
on page 44 to 48 and
Safety Precautions for All Limit Switches.
Features
Standard Switches
Many Variations in Standard Limit Switches
Features Common to All Switches
DPDB Operation
The double-pole, double-break structure ensures circuit braking.
11
Za
(NO)14
13(NO)
12
13
14
A Wide Range of Models
The series includes includes many different actuators that you select
to match the workpiece shape and motion, and a wide range of Switch
variations, such as models with operation indicators for easier
working and maintenance and models with different types of
connectors.
(NC)12
11(NC)
Load
Load
Environment-resistant Switches
Select from Six Types of Environment Resistance
The series includes
airtight switches, hermetic switches, heat-
resistant
switches, low-temperature switches, corrosion-proof
switches, and
weather-proof switches.
You can select the model
based on the onsite environment.
Degree of Protection; IP67
Approved Standards to Aid Export Machines
The Switches are certified for EN/IEC, UL, cUL, and CCC making
them ideal for export machines.
Spatter-prevention Switches
Excellent Performance on Arc Welding Lines or Sites with
Spattering Cutting Powder
Applicable to Either Standard Loads or Microloads
Standard-feature gold-clad contacts provide high reliability.
The use of a high-contact-pressure crossbar structure also increases
reliability.
Ideal for Welding Sites
These Switches use stainless steel or resin to prevent the adhesion
of spatter.
They can be used to reduce problems caused by zinc power
generated during welding.
Easy to Work With
Downsizing of the built-in switch has increased the space to house the
wiring.
The insulating paper that was often in the way when wiring has been
eliminated.
Nickle-plated steel screws are used for the terminal screws.
The screws adhere to magnetized screwdrivers to prevent dropping and
loosing them.
Long-life Switches
Mechanical Endurance of 30 Million Operations
Long-life Models for High-frequency Applications
A mechanical durability of 30 million operations minimum is provided.
The head features a double-seal structure with a head cap and oil
seal.
Models with Connectors to Reduce Wiring
A neon lamp or LED indicates the operating status.
The 3D structure of the lamp cover disperses light so you can check
the operating status from the side.
1
WL-N/WLM-N
Product Configuration
•
Basic Switches
•
High-sensitivity Switches
Standard
•
High-precision Switches
•
Protective Switches
WLGCA2-N
WLCA32-@-N
WLC@-N
WLG@-N
General-purpose
Operation indicators
•
Indicator-equipped Switches:
Neon
lamps
•
Indicator-equipped Switches:
Light emitting diodes (LED)
•
Direct-wired Switches
WL@-LE-N
WL@-LD-N
WL-@LDK@-N
WL@-@LD-M1@-N
WL@-@LD-AGJ-N
WL@-@LD-DGJ-N
WL@-@LD-DK1EJ-N
Sensor I/O connectors
•
Pre-wired Switches
•
Airtight Switches
•
Hermetic Switches
WL@-55-N
WL@-139-N
WL@-140-N
WL@-141-N
WL@-145-N
WL@-RP40-N
WL@-RP60-N
WL@-TH-N
WL@-TC-N
WL@-RP-N
WL@-P1-N
Environment-resistant
•
Heat-resistant Switches
•
Low-temperature Switches
•
Corrosion-proof Switches
•
Weather-proof
Switches
•
Basic Switches
Spatter-prevention
•
High-sensitivity Switches
•
High-precision Switches
WLC@-@S-N
WLG@-@S-N
WLGCA2-@S-N
•
Basic Switches
Long-life
•
High-sensitivity Switches
•
High-precision Switches
WLMCA2-@-N
WLMG2-@-N
WLMGCA2-@-N
2
WL-N/WLM-N
Environment-resistant Switches
Item
Type
Model
Application
Environment-resistant
Environment-resistant construction
Applicable models
All models except the low-
temperature and heat-re-
sistant models
Note: Models can be produced
using standard
actuators.
Airtight seal
WL@-55-N
Uses an airtight built-in switch.
Note: Use the SC Connector for the conduit opening.
WL@-139-N
Hermetic seal
(Molded terminals/ WL@-145-N
Anti-coolant)
WL@-RP40-N
WL@-RP60-N
For use in locations sub-
WL@-140-N
ject to cutting oil or water.
WL@-141-N
All models except the low-
temperature and heat-re-
sistant models
Refer to page 29 for information on the environ-
ment-resistant construction of Switches with Her-
metic Seals.
Note: Models can be produced
using standard
actuators. Only the
WLCA2-N, WLGCA2-N,
or WLG2-N can be
produced for the WL@-
141-N and WL@-145-N.
Low-temperature
Can be used at a tempera-
ture of –40°C (operating
WL@-TC-N
temperature range: –40 to
40°C), but cannot with-
stand icing.
Can be used in tempera-
tures of 120°C (operating
WL@-TH-N
temperature range: 5 to
120°C).
• Uses a general-purpose built-in switch.
• Epichlorhydrin rubber is used for rubber parts
such as the O-ring, gasket, etc.
All models except airtight
seal, hermetic seal, heat-
resistant, corrosion-proof,
and indicator-equipped
models
All models except airtight
seal, hermetic seal, heat-
resistant, corrosion-proof,
and indicator-equipped, ny-
lon roller (WLCA2-26N-N),
seal roller models, and res-
in rod (WLNJ-2-N) models
Heat-resistant
• Fluorine rubber is used for rubber parts such as
the O-ring, gasket, etc.
Corrosion-proof
For use in locations sub-
WL@-RP-N
ject to corrosive gases and
chemicals.
• Diecast parts, such as the switch box, are made
of corrosion-proof aluminum.
• Rubber sealing parts are made of fluorine
rubber, which aids in resisting oils and
chemicals.
• Exposed nuts and screws (except the actuator
section) are made of stainless steel.
• Moving and rotary parts such as rollers are
made of sintered stainless steel or stainless
steel.
• The
head,
box, and cover are yellow.
All models except fork lever
lock (WLCA32-41 to -44-
N), low-temperature, heat-
resistant, and indicator-
equipped models
Weather-proof
WL@-P1-N
For use in parking lots and
other outdoor locations.
Only basic (WLCA2-N/
CA12-N/CL-N), and high-
• Rubber parts are made from epichlorhydrin
sensitivity overtravel
rubber, which has a high-tolerance to changes in
(WLG2-N/G12-N/GL-N)
temperature.
models (excluding heat-re-
• Rollers are made of stainless steel to improve
sistant models).
corrosion resistance.
This does not apply to
low-
• Exposed nuts and screws are made of stainless
temperature or
heat-resis-
steel.
tant,
or indicator-
equipped
switches.
3
WL-N/WLM-N
Selection Guide
With the WL-N Series, OMRON will combine the switch,
actuator,
and wiring method required to build the ideal switch for
your application.
The WL-N Series consists of four basic types:
general-purpose, environment-resistant, spatter-protec-
tion, and
long-life switches.
WLCA2-N Switches can be used for the most common applications.
According to Operating Environment
Environment
Ambient operating temperature
−10°C
Normal
Water-resistant
to IP67.
+5°C
High-temperature
+120°C
WL@-TH-N
To increase heat resistance, the rubber material (fluorine rubber)
and the plunger material (PEEK) have
been
changed.
−40°C
Low-temperature
To increase resistance to cold, epichlorhydrin rubber and other
measures are
used.
Rubber parts are made from epichlorhydrin rubber,
which
has a
high-tolerance to changes in temperature.
WL@-P1-N
Stainless steel is
used
for the screws.
Rollers are made of stainless steel to provide superior corrosion
resistance.
Corrosion-proof specifications have
been used
for the housing,
fluorine rubber has
been used
for rubber parts, and stainless
WL@-RP-N
steel has
been used
for screws and nuts (except for the actuator)
to increase resistance to oils, chemicals, and
weather.
Uses an airtight
built-in
switch.
Cables are attached. Uses a general-purpose
built-in
switch.
The cover screws, case cover, and conduit opening are molded
from epoxy resin to increase the seal.
(The cover cannot
be
removed.)
Cables are attached. Uses an airtight
built-in
switch.
The case cover and conduit opening are molded from epoxy
resin to increase the seal. (The cover cannot
be
removed.)
The SC connector can
be
removed, so it is possible to
use
flexible conduit for the cable.
Cables are attached. Uses an airtight
built-in
switch.
The cover screws, case cover, and conduit opening are molded
from epoxy resin to increase the seal.
(The cover cannot
be
removed.)
Cables are attached. Uses an airtight
built-in
switch.
The cover screws, case cover, and conduit opening are molded
from epoxy resin to increase the seal.
(The cover cannot
be
removed.)
Double seal against oil including head cap countermeasure for
cutting chips and an oil seal.
-141: The Head section is molded from epoxy resin;
Head direction cannot
be
changed.
-145: The Head section is molded from epoxy resin;
Head can
be
in any of 4 directions.
WL@-55-N
+40°C
WL@-TC-N
Low-temperature
Switches *1
Heat-resistant
Switches *1
WLM@-N
Key specifications
+80°C
WL@-N
Models
General-purpose
Switches
Long-life Switches
Outdoors
Weather-proof
Switches *1
Chemicals and oil
Corrosion-proof
Switches *1
Airtight Switches *1
Water
drops and mist
WL@-139-N
Hermetic, Molded-terminal
Switches *1, *2
WL@-RP40-N
Hermetic, Molded-terminal
Switches *1, *2
WL@-140-N
Hermetic, Molded-terminal
Switches *1, *2
Operating environment
Constant
water
drops and mist
Constant
water
drops or splattering
cutting powder
WL@-141-N,
-145-N
Hermetic, Molded-terminal
Switches *1, *2
(Only the
WLCA2-N, WLG2-N,
and
WLGCA2-N,
can
be
produced.)
Coolant
Cables are attached. Uses an airtight
built-in
switch.
The cover screws, case cover, conduit opening, and head screws
WL@-RP60-N
are molded from epoxy resin to increase the seal.
Hermetic, Molded-terminal
(The cover and head cannot
be
removed.)
Switches *1, *2
Rubber parts are made from fluorine rubber to increase
resistance to coolant.
To prevent spatter during
welding,
a heat-resistant resin is
used
for the indicator cover and screws and rollers are all made from
stainless steel.
WL@-S-N
Spatter-prevention
Switches
Spattering from
welding
*1. Not all functions can be combined with environment-resistant switches. Refer to the applicable models on the previous page.
*2. Refer to page 29 for information on the construction of Hermetic Switches.
4
WL-N/WLM-N
According to Application Conditions
Conditions
Switching standard
loads
Load
Key specifications
10 A at 125, 250, or 500 VAC
0.8 A at 125 VDC
0.4 A at 250 VDC
0.1 A at 125 VAC, resistive load
0.1 A at 30 VDC, resistive load
Models
Entire
WL@-@-N
Series
Applicable to either standard loads or microloads.
Switching
microloads
Durability
Normal
durability
Mechanical: 15 million operation min.
(10 million operation min. for high-sensitivity
models or flexible rod models)
WL@-N
WL@-S-N
General-purpose Switches
Spatter-prevention Switches
Long-life
Mechanical: 30 million operation min.
WLM@-N
Long-life Switches
According to Ease of Installation and Maintenance
Conditions
Key specifications
Neon
lamp
125 to 250 VAC
Switching light-ON
between
operating/not
operating. (Switching is not possible for
Switches
with
Molded Terminals.)
LED
10 to 115 VAC/DC
Switching light-ON
between
operating/not
operating. (Switching not possible for models
with
molded terminals.)
Screw terminals.
No
ground terminal.
Conduit size: G1/2
Screw terminals. Ground terminal.
Conduit size: 4 sizes
Direct-wired connector, 2-conductor.
Greatly reduces
wiring work.
Wiring
specification
One-touch
connector
attachment
Direct-wired connector, 4-conductor.
Greatly reduces
wiring work.
Models
WL@-LE-N
General-purpose, Indicator-equipped (Neon Lamp) Switches
WL@-LES-N
Spatter-prevention, Indicator-equipped (Neon Lamp) Switches
WL@-LD-N
General-purpose, Indicator-equipped (LED) Switches
WL@-LDS-N
Spatter-prevention, Indicator-equipped (LED) Switches
WL@-N
WLM@-N
WL@-N
General-purpose Switches
Long-life Switches
General-purpose Switches
Operation indicator
Daily inspections
and maintenance
checks
Screw tightening
and installation
WL@-@LDK13@-N
General-purpose, Direct-wired Connector Switches
WLM@-LDK13@-N
Long-life, Direct-wired Connector Switches
WL@-@LDK43@-N
General-purpose, Direct-wired Connector Switches
WLM@-LDK43@-N
Long-life, Direct-wired Connector Switches
WL@-@LD-M1@J-N
General-purpose, Pre-wired Connector Switches
WL@-@S-M1@J-1-N
Spatter-prevention, Pre-wired Connector Switches
WLM@-LD-M1@J-N
Long-life, Pre-wired Connector Switches
WL@-@LD-@GJ-N
General-purpose, Pre-wired Connector Switches
WL@-@S-@GJS-N
Spatter-prevention, Pre-wired Connector Switches
WLM@-LD-@GJ-N
Long-life, Pre-wired Connector Switches
Connector
attachment in
control and relay
boxes
Pre-wired connector, 2-conductor.
Greatly reduces
wiring work.
Smartclick connectors for even easier
maintenance.
Pre-wired connector, 4-conductor.
Greatly reduces
wiring work.
Smartclick connectors for even easier
maintenance.
5
