switches, and Weather-proof Switches. Select the one required by the
onsite environment.
Degree of Protection; IP67
O-rings, cover seals, and other measures provide a water-proof, drip-
proof structure (IP67).
Approved Standards to Aid Export Machines
Various WL/WLM switches are approved by UL, CSA, TÜV, EN/IEC,
and CCC making them ideal for export machines.
Spatter-prevention Models
Excellent Performance on Arc Welding Lines or Sites with
Spattering Cutting Powder
High-precision Models Available in All Switch Types;
Ideal for Position Control
High-precision models achieve a very small movement to operation
(approx. 5°) and a repeat accuracy that is twice that of basic models.
Ideal for Welding Sites
Stainless steel and resins that resist adhesion of spatters are used to
prevent troubles caused by zinc powder generated during welding.
Long-life Models
Mechanical Endurance of 30 Million Operations
Operation Indicators for Easier Daily
Inspections*
Confirm operation with a neon lamp or LED for
easier startup confirmations and maintenance.
* Specify the type of operation indicator for general-
purpose models. Provided on standard models for
spatter-prevention and long-life models.
Long-life Models for High-frequency Applications
Long life has been achieved by increasing the resistance to friction
and creating better sliding properties in the head mechanism. Greater
visibility is provided when setting with a fluorescent display for setting
the stroke.
Operation
indicator
Models with Connectors Provided with All Switch Types
Reduced wiring with one-touch connection. Connectors that also
make Switch replacement easier are provided with direct-wired and
prewired models).
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(c)Copyright OMRON Corporation 2007 All Rights Reserved.
1
WL/WLM
Product Configuration
Selection by Purpose
●Basic
Switches
WL@
Selection Points
Effective for switching loads of 0.1 A, 125 VAC/30
VDC.
❍General-purpose
Switches
WLH@
❍High-sensitivity
Switches
WLG@
❍90°
Operation
Switches
WL@-2
WL@-2N
Selection Points
Effective if the overall
movement is 80° or 90°
when dog angle or
deflection is absorbed.
Standard
●Microload
Switches
WL01@
●Overtravel
Switches
●High-precision
Switches
WLGCA2
●Protective
WLCA32-@
General-
purpose
Selection Points
Provide twice the repeat accuracy as Basic Switches.
Effective for positioning in machine tools.
Selection Points
Effective for protecting the operating status.
Operation indicators
Selection Points
·
Effective for confirming workpieces
●Indicator-equipped
Switches: Neon lamps
WL@-@LE
●Indicator-equipped
Switches: Light emitting diodes (LED)
WL@-@LD
passing by on a conveyor or for
confirming operation in dark locations.
·
For standard models, add -LE or -LD.
(Operation indicators cannot be used
with some environment-resistant
specifications.)
Sensor I/O connectors
Selection Points
Effective for reducing wiring work,
making maintenance easier, and
preventing wiring mistakes.
WL Series
●Direct-wired
Switches
WL@-@LDK@
●Pre-wired
Switches
WL@-@LD-M1@
WL@-@LD-AGJ@/-DGJ@
WL@-@LD-DK1EJ@
Environment-resistant
Selection Points
Enable selection according to the
operating environment: water, oil,
chemicals, high/low temperatures, etc.
●Airtight
Switches
WL@-55
●Hermetic
Switches
WL@-139
WL@-140
WL@-141
WL@-145
WL@-RP40
WL@-RP60
●Heat-resistant
Switches
WL@-TH
●Low-temperature
Switches
WL@-TC
●Corrosion-proof
Switches
WL@-RP
●Weather-proof
Switches
WL@-P1
●Basic
Switches
WLCA2-@S
●Microload
Switches
WL01@-@S
●Overtravel
Switches
●High-precision
Switches
WLGCA2-@S
●Basic
Switches
WLMCA2@
●Overtravel
Switches
●High-precision
Switches
WLMGCA2@
Spatter-prevention
Selection Points
Effective for welding sites or spattering
cutting powder.
❍General-purpose
Switches
WLH2-@S
❍High-sensitivity
Switches
WLG2-@S
❍General-purpose
Switches
WLMH2@
❍High-sensitivity
Switches
WLMG2@
WLM Series
Long-life
Selection Points
With high mechanical durability of 30
million operations, effective for high-
frequency operation.
http://www.ia.omron.com/
(c)Copyright OMRON Corporation 2007 All Rights Reserved.
2
WL/WLM
Tables of Models
General-purpose Switches
Actuators/Heads
Type
General
purpose
Model
Roller
lever
Actuators
Plunger
Flexible
rod
Features
Total travel (TT)
• With a Roller Lever
Basic
WL@
Possible Possible Possible
45°
45°
Spatter-prevention Switches
Long-life Switches
Spatter
prevention
Model
Head specifications
One-side
operation
Possible
*1
(Except for
long-life
models.)
Head
mounting
Long-life
Model
Any of 4
directions
WLCA2-@S
WLMCA2@
General-
purpose
Overtravel
WLH@
Possible
—
—
• Overtravel is large,
making setting the
dog easier.
• Mounting is compati-
ble with WLH2.
80°
80°
Not possi-
ble
*2
Any of 4
directions
WLH2-@S
WLH2@
High-
sensitivity
Overtravel
WLG@
Possible
—
—
• Operation is highly
sensitive with only 10°
80°
pretravel.
• Overtravel is large,
making setting the
dog easier.
• Mounting is compatible
with WLG2.
• Overtravel is large,
making setting the
dog easier.
• Mounting is com-
patible with
WLCA2-2.
90°
80°
Not possi-
ble
*2
Any of 4
directions
WLG2-@S
WLMG2@
WL@-2
Overtravel, 90°
operation
WL@-2N
Possible
—
—
90°
Not possi-
ble
*2
Any of 4
directions
—
—
Possible
—
—
Either of 2
Possible
*1
directions
45°
45°
High-precision
WLGCA2
Possible
—
—
• Repeat accuracy is twice
that basic models.
• Operation is highly sensi-
tive with only 5° pretravel.
• Ideal for positioning, e.g.,
with machine tools.
• When the dog throws
the lever, the output is
reversed and the re-
versed output is held
even after the dog
passed. The original
status is returned to
only after the dog passed.
Not possi-
ble
*2
Any of 4
directions
WLGCA2-@S
WLMGCA2@
90°
Maintained
WLCA32-@
Possible
—
—
—
Any of 4
directions
—
—
*1. One-side operation means that three operational directions can be selected electrically, according to the change in direction of the operating plunger. The operating
plunger is set for operation on both sides before delivery.
*2. Those models for which one-side operation is impossible can only operate on both sides.
Connectors and Conduits
Wiring type
Direct-wired connector
Pre-wired connector
General-purpose
Model
WL@-@LDK@
WL@-@LD-M1@
WL@-@LD-@GJ@
WL@-@LD-DK1EJ@
WL@-@
WL@-@G1@
WL@-@G@
WL@-@Y@
WL@-@TS@
Connector/conduit specifications
• SC-2F/-4F Connector built-in
• XS2H-series Pre-wired Connector built-
in
• G1/2 with no ground terminal
• G1/2 with ground terminal
• Pg13.5 with ground terminal
• M20 with ground terminal
• 1/2 14NPT with ground terminal
Spatter-prevention
Model
—
WL@-@S-M1@J-1
WL@-@S-DGJS03
Long-life
Model
WLM@-LDK@
WLM@-LD-M1J
WLM@-LD-@GJ@
WLM@-LD
—
—
—
—
Conduit (screw terminal)
—
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(c)Copyright OMRON Corporation 2007 All Rights Reserved.
3
WL/WLM
Environment-resistant Switches
Item
Model
Environment-resistant
Environment-resistant construction
Type
Application
Airtight seal
WL@-55
Uses the W-10FB3-55 Airtight Built-in Switch.
Note: Use the SC Connector for the conduit opening.
Applicable models
All models except the low-
temperature and heat-re-
sistant models
Note: Models can be produced
using standard
actuators.
WL@-139
WL@-140
Hermetic seal
WL@-141
(Molded terminals/
WL@-145
Anti-coolant)
WL@-RP40
WL@-RP60
For uses in locations sub-
ject to cutting oil or water
Refer to page 25 for information on the environ-
ment-resistant construction of Switches with Her-
metic Seals.
All models except the low-
temperature and heat-re-
sistant models
Note: Models can be produced
using standard
actuators. Only the
WLCA2, WLGCA2, or
WLH2 can be produced
for the WL@-141 and
WL@-145.
Low-temperature
*
WL@-TC
Can be used at a tempera-
ture of –40°C (operating
temperature range: –40 to
40°C), but cannot with-
stand icing.
Can be used in tempera-
tures of 120°C (operating
temperature range: 5 to
120°C).
• Uses a general-purpose built-in switch.
• Silicone rubber is used for rubber parts such as
the O-ring, gasket, etc.
Heat-resistant
*
WL@-TH
• Uses a special built-in switch made from heat-
resistant resin.
• Silicone rubber is used for rubber parts such as
the O-ring, gasket etc.
• 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 oil, chemicals and
adverse weather conditions.
• 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.
• Rubber parts are made from silicone rubber,
which has a high-tolerance to deterioration over
time and changes in temperature.
• Rollers are made of stainless steel to improve
corrosion resistance.
• Exposed nuts and screws are made of stainless
steel.
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),
seal roller models, and res-
in rod (WLNJ-2) models
Corrosion-proof
WL@-RP
For use in locations sub-
ject to corrosive gases and
chemicals.
All models except overtrav-
el (90° operation), fork le-
ver lock (WLCA32-41 to -
43), low-temperature, heat-
resistant, and indicator-
equipped models
Weather-proof
*
WL@-P1
For use in parking lots and
other outdoor locations.
Only general-purpose
overtravel (WLH2/12) and
high-sensitivity overtravel
(WLG2/12) models (ex-
cluding heat-resistant mod-
els).
* Weather Resistance, Cold Resistance, and Heat Resistance
Silicon rubber is used to increase resistance to weather, cold, and heat. Silicon rubber, however, can generate silicon gas. (This can occur at room temperature, but
the amount of silicon gas generated increases at higher temperatures.) Silicon gas will react as a result of arc energy and form silicon oxide (SiO
2
). If silicon oxide
accumulates on the contacts, contact interference can occur and can interfere with the device. Before using a Switch, test it under actual application conditions
(including the environment and operating frequency) to confirm that no problems will occur in actual.
http://www.ia.omron.com/
(c)Copyright OMRON Corporation 2007 All Rights Reserved.
4
WL/WLM
Selection Guide
With the WL Series, OMRON will combine the switch, Actuator, and wiring method required to build the ideal switch for
your application.
The WL Series consists of four basic types: General-purpose, En-
vironment-resistant, Spatter-prevention, and Long-life Switches.
WLCA2 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
To increase heat resistance, the rubber material (silicon rubber)
and the material of the built-in switch have been changed.
−40°C
Low-temperature
+40°C
WL@-TC
To increase resistance to cold, silicon rubber and other
measures are used.
Rubber parts are made from silicone rubber, which has a high-
WL@-P1
tolerance to deterioration over time and changes in temperature.
Rollers are made of stainless steel to improve corrosion resistance.
Exposed nuts and screws are made of stainless steel.
Corrosion-proof aluminum diecast has been used for the
housing, fluorine rubber has been used for rubber parts, and
WL@-RP
stainless steel has been used for screws and nuts (except for
actuator) to increase resistance to oils, chemicals, and weather.
Uses an airtight built-in switch.
Cables attached. Uses a general-purpose built-in switch.
The case cover and conduit opening are molded from epoxy
resin to increase the seal. The cover cannot be removed.
Cables attached. Uses an airtight built-in switch.
The case cover and box interior 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 conduits for the cable.
Cables attached. Uses an airtight built-in switch.
The cover screws, case cover, box interior, and conduit opening
are molded from epoxy resin to increase the seal.
(The cover cannot be removed.)
Cables attached. Uses an airtight built-in switch.
The cover screws, case cover, box interior, conduit opening, box
head, and head screws are molded from epoxy resin to increase
the seal. (The cover cannot be removed.)
The Head opening is protected from cutting powder.
-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
Low-temperature
Switches *
Heat-resistant
Switches *
WLM@
Key specifications
+80°C
WL@
Models
General-purpose
Switches
Long-life Switches
Outdoors
Weather-proof
Switches *
Chemicals and oil
Corrosion-proof
Switches *
Airtight Switches *
Water drops and mist
WL@-139
Hermetic, Molded-terminal
Switches *
WL@-RP40
Hermetic, Molded-terminal
Switches *
WL@-140
Hermetic, Molded-terminal
Switches *
Operating environment
Constant water
drops and mist
Constant water
drops or splattering
cutting powder
WL@-141, -145
Hermetic, Molded-terminal
Switches *
(Only the WLCA2, WLG2, WLGCA2,
and WLH2 can be produced.)
Coolant
Cables attached. Uses an airtight built-in switch.
The case cover, box interior, conduit opening, and head screws
WL@-RP60
are molded from epoxy resin to increase the seal. (The cover
Hermetic, Molded-terminal
cannot be removed.) Rubber parts are made from fluorine rubber Switches *
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
Spatter-prevention
Switches
Spattering from
welding
* Not all functions can be combined with environment-resistant switches. Refer to the applicable models on the previous page.
http://www.ia.omron.com/
(c)Copyright OMRON Corporation 2007 All Rights Reserved.
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