Preventing Unintended Start-ups – Enhanced Operator Protection
In modern factories, tasks such as maintenance, cleaning, or machine adjustments often require operators to enter hazardous areas. An unintended machine start-up during these times could have severe consequences for workplace safety.
To enhance protection within Lockout/Tagout (LOTO) procedures, Pizzato Elettrica has introduced the LK X safety locking device—an accessory specifically designed for the NX series safety interlocks. This solution effectively prevents the machine from restarting while personnel are still working in the hazardous zone.
I. LK X Safety Locking Device
The LK X is a mechanical locking device designed for use with Pizzato’s NX series safety interlocks. When activated, the device prevents the insertion of the interlock actuator, thereby making it impossible to close the safety circuit and start the machine. It is a simple yet effective solution that boosts safety during machine maintenance, repair, or cleaning operations.

II. Seamless Integration with NX Series Interlocks
The LK X is designed to mount directly onto the NX series’ dedicated bracket, allowing for quick integration into existing systems without altering the machine’s overall design. This solution is ideal for companies looking to upgrade safety levels while continuing to utilize their current safety interlock systems.
III. Durable Metal Design for Industrial Environments
Constructed entirely from metal, the LK X offers high impact resistance, wear resistance, and exceptional durability, making it suitable for harsh industrial environments. Thanks to its robust construction, the device operates reliably under various conditions, such as:
- Automated manufacturing plants
- Food and beverage processing plants
- Pharmaceutical industry
- Metal processing
- Automotive and component manufacturing
- Packaging lines
- Industrial robotic systems
IV. Simple, intuitive operation
Using the LK X is quick and convenient. Operators simply slide the red locking cover upward to shield the actuator insertion point on the NX interlock. This prevents the actuator from being inserted into the lock, thereby disabling the machine from starting. Its intuitive design minimizes required actions and reduces the likelihood of errors during LOTO procedures.
V. Supports multiple operators simultaneously
A key advantage of the LK X is its ability to accommodate multiple operators working at the same time. The device features slots for up to four personal padlocks, allowing each technician to secure the equipment with their own lock before entering a hazardous area.
The machine can only be put back into operation once all padlocks have been removed. This ensures that everyone has cleared the work area before the system restarts, minimizing the risk of accidents caused by unintended startup.
VI. Benefits of using the LK X
Integrating the LK X locking device with the NX interlock system offers numerous operational and maintenance benefits:
- Enhances the effectiveness of Lockout/Tagout (LOTO) procedures
- Prevents unintended machine restarts
- Ensures safety for multiple operators simultaneously
- Robust design and high durability
- Easy installation and integration with existing systems
- Reduces the risk of accidents during maintenance and cleaning
VII. Applications Across Various Industries
The LK X locking device is suitable for machinery systems featuring safety doors or safety fencing that require opening for inspection, cleaning, or routine maintenance. Typical applications include:
- Robotic cells and automation lines
- Packaging machinery
- Food and beverage production lines
- Pharmaceutical plants
- Presses and metalworking machinery
- Automotive industry
- Intralogistics and ASRS systems
- Machinery with maintenance doors or movable safety guards
These environments demand rigorous Lockout/Tagout (LOTO) procedures to ensure the safety of operations and maintenance personnel.
VIII. Vu Le Tech: Pizzato Safety Solutions Partner in Vietnam
The LK X safety locking device serves as an effective complement to Pizzato’s NX series interlocks, enhancing safety levels during machinery maintenance and repair. With its robust design, support for multiple personal padlocks, and easy integration into existing systems, the LK X helps complete the Lockout/Tagout process, minimizes the risk of unintended startup, and protects operators in modern industrial environments. Vu Le Tech is a provider of Pizzato Elettrica industrial safety solutions, including interlocks, safety sensors, pull-wire switches, safety relays, and Lockout/Tagout accessories. Contact the Vu Le Tech technical team for advice on solutions tailored to your enterprise’s machinery systems and safety protocols.

Vu Le Technology Co., Ltd. – specializing in robotic arm and factory automation solutions.
► Address: No. 7, Lot C2, Street 659, Phuoc Long Ward, Ho Chi Minh City
► Hotline: (028) 3620 8179 / 3620 8176 / 3620 8177 | Fax: (028) 3620 8178
► Email: info@vuletech.com



































