Siemens SIRIUS 3SE5112-0LH01 Position Switch, Metal Enclosure, 40mm, 1NO+2NC Snap-Action Contacts

The Siemens SIRIUS 3SE5112-0LH01 is a high-performance position switch designed for reliable mechanical position sensing and monitoring in industrial environments. Housed in a durable 40mm metal enclosure that complies with EN 50041 standards, this device is engineered to withstand demanding operational conditions. It features a rotary actuator that is adjustable to the left or right, equipped with a 27mm metal lever and a 19mm plastic roller for precise interaction with machine parts.

Advantages

This position switch offers exceptional versatility through its modular design, allowing for various configurations with minimal component types. The inclusion of snap-action contacts, specifically 1 normally open and 2 normally closed, ensures rapid and reliable switching operations. Its robust metal construction provides high mechanical stability, while the standardized M20x1.5 cable entry facilitates secure and straightforward electrical installation. Furthermore, the device is globally certified, meeting stringent international standards for safety and performance in automation systems.

Suitable for

• Position sensing of machine components
• Monitoring of protective equipment and safety guards
• Industrial automation systems requiring high reliability
• Applications compliant with EN 50041 standards

When it may not be suitable

This switch may not be appropriate for environments involving extreme chemical exposure that could degrade the metal enclosure or plastic roller components. Additionally, it is not intended for applications requiring non-contact sensing technologies, such as inductive or capacitive proximity sensors.

Key specifications

• Enclosure width: 40 mm
• Enclosure material: Metal
• Contact configuration: 1 NO + 2 NC snap-action contacts
• Cable entry: 1x M20 x 1.5
• Actuator type: Rotary actuator with 27 mm metal lever and 19 mm plastic roller
• Standards compliance: EN 50041

How to use

Installation should be performed by qualified personnel in accordance with the provided technical documentation. Mount the switch securely using the designated fixing points, ensuring the actuator is correctly aligned with the moving machine part to be monitored. Connect the wiring through the M20x1.5 cable entry, ensuring that the cable gland is properly tightened to maintain the enclosure's integrity. Once installed, verify the mechanical operation of the lever and roller to ensure the contacts trigger at the intended position points.

What to consider before purchase

• Verify that the 40mm enclosure dimensions fit your mounting space.
• Ensure the rotary actuator and roller type are compatible with your specific mechanical interface.
• Confirm that the 1NO+2NC contact configuration meets your control circuit requirements.
• Check that the M20x1.5 cable connection is compatible with your existing cabling infrastructure.

Usage recommendations: Regularly inspect the mechanical actuator and roller for signs of wear or misalignment to ensure consistent performance. Periodically test the switching function to confirm that safety-related monitoring remains active and reliable.