Two-Circuit Limit Switch [WL-N/WL]
Caution
Product Description
A 2-circuit limit switch with multiple types that can be selected according to the operating environment and application.
[Features]
· A variety of head shapes, including a rotational lever type, a plunger type, a flexible rod type and a fork locking lever type.
· Select the best shape from the available actuators to match the movement and shape of the workpiece.
· As well as types for general detection, there are also environmentally-resistant types suitable for use in harsh environments, spatter-resistant types suitable for welding processes, and long-lifespan types suitable for use in high-frequency applications.
Dimensional Drawing of OMRON Limit Switch
Model WLCA2/Model WL01CA2 of Limit Switch
*Stainless steel sintered roller
Note: The dimensional tolerance of parts not specified in the external dimension diagram of each model is ±0.4mm.
*For information on model numbers other than those listed above, please refer to the digital catalog.
Specification of OMRON Limit Switch
Performance of Limit Switch
| Protective structure | IP67 | |
|---|---|---|
| Durability*1 | Mechanical | Over 15 million times*2 |
| Electrical | Over 750,000 times*3 | |
| Allowable Operating Speed | 1mm to 1m/s (for WLCA2) | |
| Permissible operating frequency | Mechanical | 120 times/min |
| Electrical | 30 times/min | |
| Rated Frequency | 50/60Hz | |
| Insulation resistance | 100MΩ or more (at DC500V mega) | |
| Contact Resistance | 25mΩ or less (initial value, built-in switch only)*6 | |
| Withstand voltage | Between same-polarity terminals | AC1,000V 50/60Hz 1min |
| Between each terminal and earth | AC2,200V 50/60Hz 1min/Uimp 2.5kV | |
| Between each terminal and non-current-carrying metal parts | AC2,200V (1,500V) 50/60Hz 1min/Uimp 2.5kV | |
| Rated insulation voltage (Ui) | 250V (EN60947-5-1) | |
| Pollution level (usage environment) | 3 (EN60947-5-1) | |
| Short Circuit Protection Device | 10A fuse type gG or gI (IEC269) | |
| Conditional Short Circuit Current | 100A (EN60947-5-1) | |
| Rated sealed thermal current (I the) | 10A, 0.5A (EN60947-5-1) | |
| Electric shock protection class | Class I | |
| vibration | malfunction | 10 to 55Hz, double amplitude 1.5mm *4 |
| impact | Durability | Up to 1,000m/s2 |
| malfunction | Maximum 300m/s2* 4 | |
| Ambient temperature | -10 to +80℃ (but do not freeze) *5 | |
| Ambient humidity | 35～95% RH | |
| mass | Approx. 275g (for WLCA2) | |
Note 1. The above values are initial values of Limit Switch.
Note 2. The values in parentheses for the withstand voltage are for the microload type.
*1. The durability values are for an ambient temperature of 5 to 35°C and an ambient humidity of 40 to 70% RH.
*2. For overtravel general type and flexible rod type, it is 10 million times or more. For weather-
resistant type, it is 500,000 times or more.
*3. For microload type, it is 1 million times or more. For weather-
resistant type, it is 500,000 times or more.
*4. Flexible rod type is excluded. For microload type, it is up to 200 m/s2.*
5. For cold-resistant type, it is -40 to +40°C (but do not freeze).
For heat-resistant type, it is +5 to +120°C.
*6. For microload type, it is 50 mΩ or less (initial value, built-in switch only).
Specification Table of OMRON Limit Switch
Model WLCA2/Model WL01CA2 of Limit Switch
| (Operating Characteristics) | Model | (Model) WLC A2 (Model) WL01 CA2 |
|---|---|---|
| Operating Force, OF | (Max) | 13.34N |
| Return Force, RF | (Min) | 2.23N |
| Pre-Travel, PT | 15 ± 5° | |
| Over-Travel, OT | (Min) | 30° |
| Differential Travel, MD | (Max) | 12° |
How to Use of OMRON Limit Switch
Application Examples of Limit Switch
Features of OMRON Limit Switch
Limit Switch General form
Our long track record has created a wide variety of options to meet your needs, including standard environmentally resistant limit switch specifications ,
Limit Switch, a wide range of actuators to suit any workpiece, selectable operation sensitivity according to the movement of the workpiece, and models with operation indicator lights and wiring specifications to meet ease of use and maintenance.
Environmentally resistant
Six types of environmentally resistant models are available in the series:
highly sealed, highly sealed, heat-resistant, cold-resistant, corrosion-resistant, and resistant models. Choose the model that
best suits your site environment.
Anti-spatter type
Effective in arc welding lines and places where cutting chips fly.
Stainless steel and resin materials are used for the components to prevent spatter adhesion.
Reduces problems caused by Zn powder generated during welding.
Long life type
Achieves high mechanical durability of over 30 million operations.
Long-life model suitable for frequent use.
High durability has been achieved through improvements to the abrasion resistance and sliding properties of the head mechanism.
In addition, the fluorescent display of the stroke setting zone improves visibility when setting.
Features common to all models
The joint is a two-circuit double breaker
, ensuring a reliable interruption of the circuit.
IP67 protection rating
The structure complies with IP67 using O-rings, cover seals, etc.
Obtained overseas standards for export machinery
Limit Switch It is ideal for export machinery as it is certified to UL, CSA, TUV, EN/IEC, and CCC standards.
Operation display for easy daily inspection
The operating status can be confirmed by a neon lamp or LED, making start-up checks and maintenance easy.
*The general type is equipped with an operation display type, while the spatter-proof type and long-life type are equipped with a standard type.
Connector type lineup that reduces wiring work
Reduces the amount of work required for wiring switches. In addition, we offer a series of connectors (direct connection type, pre-wired type) that make replacement easy.
Selection Support Information of OMRON Limit Switch
Technical Information of OMRON Limit Switch
<About DC 2-wire connector pin wiring>
- In accordance with the establishment of the IEC standard (IEC947-5-2 Table III), the connector pin wiring has been changed to comply with the IEC standard.
(Only the DC 2-wire type has been changed from the conventional type.)
- A pin wiring conversion connector (plug) is available for maintenance of old pin wiring products. (However, only NO type can be used.)
Also, those who are already using the connector relay box type XW3A-P□45-G11 should use the code on the right.
Cautions and Prohibitions of OMRON Limit Switch
Caveat Limit Switch
This Limit Switch product cannot be used to directly or indirectly detect the human body for the purpose of ensuring safety.
Do not use this product as a detection device for human body protection.
Note
Do not short-circuit the load. This may cause the device to explode or burn.
If you connect the power supply directly without a load, the internal elements may explode or burn, so be sure to connect the device with a load.