The Pilz PSEN SL Restart Interlock (Padlock), part number 570552, is a high-quality mechanical accessory designed for use with Pilz PSEN safety switches with guard locking. Its purpose is to add an additional layer of safety by preventing the unintentional or unauthorised restart of machinery during servicing, maintenance, or cleaning operations. By combining durability with functionality, it contributes significantly to machine safety in compliance with international standards.

Constructed with premium-grade materials, the PSEN SL Restart Interlock is designed for long-term use in industrial environments. The lever arm is made of stainless steel (1.4301), offering excellent resistance to wear, impact, and corrosion. This ensures that the device remains reliable even in demanding conditions such as high-humidity areas, washdown zones, or facilities with exposure to aggressive cleaning agents. The side sections are made of aluminium, providing a lightweight yet durable frame that supports robust mechanical performance without unnecessary bulk.

A key feature of this device is its restart interlock capability with padlock functionality. During maintenance, operators can insert and secure a padlock into the interlock mechanism, physically preventing the safety gate or guard from being closed and the machine from restarting. This simple but effective measure supports lockout/tagout (LOTO) procedures, ensuring that only authorised personnel can restart the machine once it is safe to do so. By eliminating the risk of accidental reactivation, the restart interlock significantly enhances operator safety and prevents costly downtime caused by accidents.

The interlock is also engineered with precise screw torque requirements of 5.5 Nm ±0.5 Nm, ensuring secure and consistent installation. This attention to detail guarantees that the device can be mounted safely and that its long-term reliability is maintained.

Despite its robust construction, the accessory is compact and practical, weighing just 200 g (net) with a gross weight of 280 g. This makes it easy to handle during installation and ensures it can be integrated into safety systems without adding unnecessary complexity.

Applications for the PSEN SL Restart Interlock span a wide range of industries, including manufacturing, packaging, food and beverage processing, and robotics. It is especially valuable in environments where machinery requires frequent access for cleaning or adjustment. By integrating this padlockable restart interlock, businesses can align with strict safety protocols and demonstrate compliance with occupational safety regulations.

In summary, the Pilz PSEN SL Restart Interlock (Padlock) – 570552 is a durable, compact, and effective accessory for enhancing machine safety. With its stainless steel lever arm, aluminium housing, padlock functionality, and precise installation requirements, it provides a practical and reliable solution to prevent accidental or unauthorised machine restarts, protecting both personnel and equipment in demanding industrial environments.