Product Overview
The WLCA12-2-Q is a heavy duty limit switch equipped with a roller lever actuator. It is used for mechanical position detection, travel limit control, and machine operation feedback in industrial machinery and automation systems. The roller lever actuator is suitable for applications where a moving cam, rail, plate, or mechanical component contacts the switch during machine operation.
This page describes model WLCA12-2-Q only. The product is suitable for cranes, hoists, elevators, conveyors, machine tools, packaging equipment, material handling systems, and other industrial equipment that requires reliable end-position or travel-limit detection.
Key Technical Data
| Item | WLCA12-2-Q |
|---|---|
| Product type | Heavy duty limit switch |
| Actuator type | Roller lever |
| Contact structure | Double-circuit contact |
| NO terminal | 3–4 |
| NC terminal | 1–2 |
| Protection degree | IP66 |
| Operating speed | 1 mm to 1 m/s |
| Operating force | 8.83 N max. |
| Release force | 0.49 N min. |
| Pre-travel | 25° ±5° max. |
| Overtravel | 60° min. |
| Movement differential | 16° max. |
| Mechanical life | 15,000,000 operations or above |
Product Display
The WLCA12-2-Q uses a heavy duty switch body with a roller lever actuator. The structure includes an aluminum alloy housing, actuator head, roller lever mechanism, terminal cover, sealing components, and conduit section for field wiring. The roller lever design is suitable for smooth mechanical contact with cams, rails, and moving machine parts.
Features
- Double-circuit contact structure for NO and NC control logic.
- Roller lever actuator for mechanical position detection and travel-limit control.
- Aluminum alloy housing for high mechanical strength.
- Water-proof and oil-proof construction for industrial environments.
- Built-in contact box with double-spring mechanism for stable switching action.
- Long mechanical life for frequent machine operation.
- IP66 protection degree when properly installed and sealed.
- Suitable for cranes, hoists, elevators, conveyors, machine tools, and automation equipment.
- Other actuator configurations are available in the WL series for different machine structures. This page focuses on the WLCA12-2-Q roller lever type.
Drawing
Outline and Mounting Dimensions
The drawing is used to confirm the product outline, mounting hole position, actuator head direction, roller lever clearance, conduit position, and installation space of the WLCA12-2-Q. Before installation, confirm that the moving mechanical part can contact the roller smoothly within the allowable operating angle.
The actuator should not be used as a direct mechanical stopper. Excessive impact, misalignment, or insufficient overtravel allowance may affect contact stability and mechanical life.
Contact Form
WLCA12-2-Q uses a double-circuit contact structure with normally open and normally closed contacts. The normally open contact uses terminals 3–4 and closes when the actuator is operated. The normally closed contact uses terminals 1–2 and opens when the actuator is operated.
Wiring logic should be selected according to the control circuit. Safety-related circuits often use NC logic, but the final selection should follow the electrical design of the equipment.
Ratings
Rated Load Table
| Rated Voltage | Resistance Load NC | Resistance Load NO | Lamp Load NC | Lamp Load NO | Inductive Load NC | Inductive Load NO | Motor Load NC | Motor Load NO |
|---|---|---|---|---|---|---|---|---|
| 125VAC | 10A | 10A | 3A | 1.5A | 10A | 10A | 5A | 2A |
| 250VAC | 5A | 5A | 2A | 1A | 5A | 5A | 3A | 1A |
| 480VAC | 3A | 3A | 1.5A | 0.8A | 3A | 3A | 1.5A | 0.8A |
| 600VAC | 1A | 1A | 1A | 0.5A | 1.5A | 1.5A | 1A | 0.5A |
| 8VDC | 10A | 10A | 6A | 3A | 10A | 10A | 6A | 6A |
| 14VDC | 10A | 10A | 6A | 3A | 10A | 10A | 6A | 6A |
| 30VDC | 6A | 6A | 4A | 3A | 6A | 6A | 4A | 4A |
| 125VDC | 0.8A | 0.8A | 0.2A | 0.2A | 0.8A | 0.8A | 0.2A | 0.2A |
| 250VDC | 0.4A | 0.4A | 0.1A | 0.1A | 0.4A | 0.4A | 0.1A | 0.1A |
Load Type Notes
- Surge current: NC 30A under, NO 20A under.
- Inductive load has a power factor of 0.4 minimum for AC and a time constant of 7 ms maximum for DC.
- Lamp load inrush current is approximately 10 times the steady-state current.
- Motor load inrush current is approximately 6 times the steady-state current.
- For inductive, lamp, or motor loads, the inrush current should be considered during circuit design.
Specifications
Electrical
| Item | Specification |
|---|---|
| Contact resistance | 15 mΩ max., initial value |
| Insulation resistance | 100 MΩ min. at 500 VDC |
| Dielectric strength 1 | 1000 VAC, 50/60 Hz for 1 minute between terminals of the same polarity |
| Dielectric strength 2 | 1500 VAC, 50/60 Hz for 1 minute between current-carrying and non-current-carrying metal parts |
| Dielectric strength 3 | 1500 VAC, 50/60 Hz for 1 minute between each terminal and ground |
| Electrical life | 500,000 operations or above |
Mechanical
| Item | Specification |
|---|---|
| Operating speed | 1 mm to 1 m/s |
| Operating frequency | Mechanical: 120 operations/min; Electrical: 30 operations/min |
| Vibration | 10–55 Hz, 1.5 mm double amplitude |
| Shock durability | 1000 m/s², approx. 100G |
| Shock malfunction | 300 m/s², approx. 30G |
| Mechanical life | 15,000,000 operations or above under rated overtravel |
| Weight | About 275 g |
Environmental
| Item | Specification |
|---|---|
| Ambient temperature | -10°C to +80°C, with no icing |
| Humidity | <95% RH |
| Degree of protection | IP66 |
Operating Characteristics
The following operating characteristics apply to model WLCA12-2-Q only. The mechanical stroke, actuator angle, and mounting position should be checked according to the machine structure and the direction of the moving part.
| Parameter | Description | WLCA12-2-Q |
|---|---|---|
| OF | Operating force, maximum | 8.83 N |
| RF | Release force, minimum | 0.49 N |
| PT | Pre-travel, maximum | 25° ±5° |
| OT | Overtravel, minimum | 60° |
| MD | Movement differential, maximum | 16° |
| OP | Operating position | Refer to drawing |
Selection Guide
Actuator and Motion Direction
WLCA12-2-Q uses a roller lever actuator. It is suitable for applications where a cam, rail, plate, or mechanical component contacts the roller from the correct direction. The lever angle and reset space must be reserved during installation.
Electrical Load and Contact Rating
Confirm the circuit voltage, current, load type, and NO/NC contact logic before selection. Motor, lamp, and inductive loads can generate high inrush current, so the rated load table should be checked according to the actual circuit condition.
Stroke, Overtravel and Reset
The actuator should be operated within the allowable movement range. The moving part must contact the roller smoothly and provide enough overtravel without using the switch as a mechanical stop. After actuation, the lever must reset reliably.
Installation Environment
WLCA12-2-Q has IP66 protection and is suitable for dusty, oily, and wet industrial environments when properly installed. The conduit entry, terminal cover, and sealing area should be checked to maintain protection performance.
Replacement Check
Before replacing an existing limit switch with WLCA12-2-Q, compare the actuator type, body size, mounting hole position, terminal arrangement, conduit direction, rated load, and operating characteristics.