WLCA2-2139 5M

Ingress Protection:	IP67 - Dust Tight, Waterproof
Mechanical Life:	15,000,000 Cycles
Electrical Life:	750,000 Cycles
Operating Position:	--
Operating Temperature:	-10°C ~ 80°C
Overtravel:	60°
Differential Travel:	16°
Pretravel:	25°
Release Force:	50gf
Operating Force:	900gf
Features:	Sealed - Hermetically
Series:	WL
Termination Style:	Cable Leads
Mounting Type:	Chassis Mount
Actuator Type:	Side Rotary, Roller
Voltage Rating - DC:	30V
Voltage Rating - AC:	125V
Current Rating:	10A (AC), 6A (DC)
Switch Function:	On-Mom
Circuit:	SPDT (DB/DM)
Part Status:	Obsolete
Packaging:	Bulk

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Snap Action, Limit Switches: WLCA2-2139 5M Application Field and Working Principle

Snap action limit switches are electromechanical, multi-purpose devices used for sensing the presence or absence of an object. The WLCA2-2139 5M series from Siemens is one such device designed for direct mounting on equipment or contours that require quick response, with a broad range of temperature depending on the contact materials. The switch has no mechanical backlash, a long electrical life span, and a swivel mechanism that allows for repeatable accuracy.

Application Field

The WLCA2-2139 5M series is primarily used to control process machinery, motors, and pumps. It is highly effective in heavy industrial applications that require recurring switch operations. Its utilization ranges from general process automation and production processes to medical, robotics, and transportation equipment. The device works especially well in hazardous environments where dust, moisture, and even cleaning agents could keep it from performing effectively and safely. Its ability to adjust to temperature extremes and vibration helps it stand up to any installation requirements.

Working Principle

The WLCA2-2139 5M functionality is based on a process of mechanical actuation, triggering a contact closure when a certain amount of force is applied to the switch actuator. This actuation is the driving force of the device, which is accomplished with a snap-action or a toggle mechanism. To operate, an actuator arm is pressed down by a moving object, making contact and triggering the switch. The force to activate the switch is adjustable and ranges from 10N to 10Nm. Also, the force can be regulated depending on the size of the arm and spring fitted into the switch. Similarly, the operating characteristics can be finely adjusted. This includes the device\'s sensitivity to heat and cold, ensuring smooth operation in extreme temperatures. The electrical connection system is self-cleaning and can break current with regular service. This ensures reliable switching performance and a long operational life.

Conclusion

The WLCA2-2139 5M snap action limit switch from Siemens is suitable for virtually any industrial application or process automation. It is highly reliable, with a long electrical life span, enabling it to handle large load currents and recurrent switch operations. Its temperature range and actuation force can also be finely adjusted, making it a great choice for harsh or hazardous environments.

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