1. Introduction
This manual provides essential information for the safe and effective use of the PILZ PSEN-2.1-10 Magnetic Safety Switch Actuator. This device is designed for use with compatible magnetic safety switches to monitor the position of guards or other movable parts in industrial applications, ensuring machine safety.
Please read this manual thoroughly before installation, operation, or maintenance to ensure proper functionality and to prevent potential hazards.
2. Safety Information
Important Safety Instructions:
- Always disconnect power before performing any installation, maintenance, or troubleshooting.
- Installation and wiring must be performed by qualified personnel in accordance with all local and national electrical codes and safety regulations.
- Do not modify the device in any way. Unauthorized modifications can compromise safety and void the warranty.
- Ensure the operating environment is within the specified temperature and humidity ranges.
- Regularly inspect the actuator and associated safety switch for any signs of damage or wear.
This actuator is a component of a safety system. Its proper function is critical for personnel and machine safety. Failure to follow these instructions can result in serious injury or death.
3. Product Overview

Figure 3.1: PILZ PSEN-2.1-10 Magnetic Safety Switch Actuator. This image shows the compact yellow actuator with the PILZ logo and model number (PSEN 2.1-10, 512110) visible on its surface. It features two mounting holes.
The PILZ PSEN-2.1-10 is a magnetic actuator designed to work in conjunction with PILZ magnetic safety switches. It provides a reliable and non-contact method for position monitoring, typically used for safety gate monitoring or position detection in machinery.
Key features include:
- Non-contact operation, reducing wear and tear.
- Compact design for easy integration.
- Durable construction suitable for industrial environments.
- Operating distance of 3 mm.
4. Setup and Installation
4.1 Mounting the Actuator
The PSEN-2.1-10 actuator should be mounted opposite its corresponding magnetic safety switch. Ensure the alignment is precise to achieve the specified operating distance of 3 mm. Use appropriate fasteners through the two mounting holes on the actuator.
- Identify the optimal mounting position on the movable guard or machine part.
- Securely fasten the actuator using screws appropriate for the mounting surface.
- Verify that the actuator and the safety switch are parallel and within the specified operating distance when the guard is closed.
4.2 Wiring (Refer to Safety Switch Manual)
This actuator is a passive component and does not require electrical wiring itself. It interacts magnetically with a separate PILZ magnetic safety switch, which handles the electrical connections to the control system. Refer to the specific manual for your PILZ magnetic safety switch for detailed wiring instructions.
5. Operation
The PILZ PSEN-2.1-10 actuator operates by creating a magnetic field that is detected by its paired magnetic safety switch. When the actuator is within the specified operating distance (3 mm) of the safety switch, the safety contacts of the switch will close, indicating a safe condition (e.g., a guard is closed).
When the actuator moves beyond this operating distance (e.g., the guard is opened), the magnetic field weakens, causing the safety contacts of the switch to open, initiating a safe stop or preventing machine startup.
Operational Check:
- After installation, perform a functional test by opening and closing the guard or movable part.
- Verify that the safety circuit reacts as expected (e.g., machine stops when guard opens, machine starts only when guard is closed).
- Ensure there are no obstructions or foreign objects that could interfere with the magnetic interaction.
6. Maintenance
The PILZ PSEN-2.1-10 actuator is designed for minimal maintenance due to its non-contact principle. However, regular inspections are recommended to ensure continued safe operation.
Recommended Maintenance Schedule:
- Weekly/Monthly: Visually inspect the actuator and its mounting for any signs of physical damage, corrosion, or loose fasteners.
- Annually: Perform a functional test of the safety system, including the actuator and its paired safety switch, to confirm proper operation and response times.
- Keep the surface of the actuator clean and free from excessive dust, dirt, or metallic debris that could interfere with the magnetic field. Use a soft, damp cloth for cleaning; avoid abrasive cleaners or solvents.
7. Troubleshooting
If the safety system incorporating the PSEN-2.1-10 actuator is not functioning as expected, consider the following common issues:
| Problem | Possible Cause | Solution |
|---|---|---|
| Safety circuit does not close when guard is shut. |
|
|
| Intermittent safety circuit activation. |
|
|
For complex issues or if troubleshooting steps do not resolve the problem, contact PILZ technical support or a qualified service technician.
8. Technical Specifications
| Parameter | Value |
|---|---|
| Model Number | PSEN 2.1-10 |
| Part Number | 512110 |
| Operating Principle | Magnetic |
| Operating Distance | 3 mm |
| Dimensions (L x W x H) | 1.38 x 0.98 x 1.38 inches |
| Weight | 1.44 Pounds |
| Manufacturer | Pilz |
9. Warranty and Support
For information regarding the warranty period and terms for the PILZ PSEN-2.1-10 actuator, please refer to the official PILZ website or contact your authorized PILZ distributor. Warranty terms typically cover defects in materials and workmanship under normal use.
Technical Support:
For technical assistance, product inquiries, or service requests, please contact PILZ customer support. Contact details can usually be found on the official PILZ website (www.pilz.com) or through your local PILZ representative.





