Two-circuit Limit Switch
WL
F-75
Lim
it
Switch
es
Nomenclature
■
General-purpose Models
Note: 1.
The display for conduit threads has changed from PF
1
/
2
to G
1
/
2,
according to revisions of JIS B 0202. This is only a change in the display,
so the thread size and pitch have not changed. (Conduit threads Pg 13.5 and
1
/
2
-14NPT are also available.)
2.
By changing the orientation of the operational plunger, three operational directions can be selected electrically. (This is only possible with
general-purpose roller lever, adjustable roller lever, and adjustable rod lever models. For the overtravel models, only -2N Series models
have this function.)
Lamp-equipped Models
The operating status of the Switch can be checked using a neon
lamp of LED indictor.
Circuit checks and troubleshooting errors are easy done.
The built-in switch’s terminal screws are used to connect the lamp
terminal (indicator cover). Since the connection spring (coil spring) is
used for this connection, it will not be necessary to connect to the
lamp terminal. When a ground terminal is provided however, lead
wire method must be used.
WL-LD has a built-in rectifier stack, so it will not be necessary to
change the polarity.
The indicator cover is molded from diecast aluminum and has out-
standing sealing properties. Furthermore, regardless of whether the
power is connected or not, the operating status is shown (operating
or not operating), and indicators can be switched from light-ON when
operating and light-ON when not operating, by simply rotating the
lamp holder by 180
°
. (Molded terminals do not have this switching
capacity.)
The lamp-equipped models are ideal in locations using a conveyor
belt where items need to be checked, or locations that are difficult to
inspect for faults.
Set Position Marker Plate
Roller
Requires maintenance (excessive overtravel)
Shaft Section Seal
Conduit Opening
(See note 1.)
Head
Proper range
Proper range
Bearing
The bearing smooths the plunger movement.
Built-in Switch
Lever
Roller Lever Setscrew
Operational Plunger
(See note 2.)
Cover Seal
Terminal Screws
M4 screws
Cover
Insulator
Cover Setscrew
A Phillips screw is used to ensure ease of use.
After operation, set the indicator needle on the
marker plate so that is in the convex section of the
bearing. For the WLD2, insert the needle so that is
is between the two main wires on the plunger.
Requires maintenance
(insufficient overtravel)
Requires maintenance
(excessive overtravel)
Head-mounting
Screws
The Head used in the roller lever type, adjustable
rod lever type, or horizontal plunger type (except
the -2N Series) can be mounted in any of the four
directions by removing the screws at the four cor-
ners of the Head.
By fitting an O-ring to the rotary shaft and with an
appropriate interference of the screws, high-seal-
ing properties are maintained.
The built-in switch (for all models except the micro-
load models) has an extended mechanical life of 15
million operations or more.
The conduit threads are parallel threads for G 1/2
tube and offer further increased sealing properties
when used in conjunction with the SC connector.
The roller is made of self-lubricating sintered stain-
less steel and boasts high resistance to wear.
The lever forged of anti-corrosive aluminium alloy
features high corrosion resistances and outstand-
ing ruggedness. With roller lever, adjustable rod
and flexible rod models, the actuator position can
be set anywhere within 360
°
. (The lever cannot be
mounted in the opposite direction.)
By using an O-ring as the cover seal, an optimum
squeeze can be obtained and high sealing proper-
ties are assured as well.
The insulator has outstanding insulation proper-
ties and prevents the generation of any gases
which may corrode the internal parts.
Indictor window
Light-emitting diode (LED)
Contact spring
Lamp holder
Light-ON when Operating
Light-ON when Not Operating
LED at bottom
LED at top