Why Choose the Pizzato NSL4ST1SMK Safety Interlock Switch?
The Pizzato NSL4ST1SMK is a high-performance RFID safety interlock switch with guard locking designed for industrial machine safety applications requiring reliable access control, secure door monitoring, and robust anti-tamper protection. It belongs to the advanced Pizzato NS NS-series safety locking switch family, widely used in robotics, OEM machinery, and automated production systems.
This model features a de-energised solenoid locking mechanism combined with high-level RFID coding (F41). The F41 coding ensures each switch is paired with a uniquely programmed actuator, meaning only its matched key is recognised, significantly improving protection against bypassing or unintended activation in safety-critical environments.
With its compact reinforced technopolymer housing, industrial sealing, and IP67/IP69K protection rating, the NSL4ST1SMK is suitable for robotic cells, packaging machinery, conveyors, and OEM equipment where dependable guard locking and high-integrity safety interlocking are required in demanding industrial environments.
Key Advantages
- High-level RFID coding (F41) for unique actuator pairing and enhanced anti-tamper protection.
- Solenoid guard locking with fail-safe de-energised release principle.
- Dual safety outputs (OS1/OS2) for redundant guard monitoring.
- Integrated diagnostic outputs for actuator and lock status (O3/O4).
- Designed for high-performance safety architectures up to PL e / SIL 3 (system dependent).
- Seamless integration into modern industrial safety PLC systems.
Key Features
- Pizzato NS-series safety interlock switch with locking.
- Model: NSL4ST1SMK.
- RFID high coding actuator recognition (F41 unique pairing system).
- De-energised solenoid guard locking (fail-safe design).
- M12 industrial connector interface (NS-series architecture).
- Safety outputs OS1/OS2 with diagnostic signalling O3/O4.
- Auxiliary manual release for maintenance and emergency access.
Reliable Machine Guarding and Safety Control
The Pizzato NSL4ST1SMK ensures machinery only operates when protective guards are correctly closed and securely locked. When the uniquely coded actuator is engaged and the locking system is active, the safety outputs allow controlled machine operation under safe conditions.
If the guard is opened or the locking condition is removed, the system triggers an immediate safe stop. Continuous monitoring of actuator and lock status ensures reliable integration into PLC-based safety architectures used in industrial automation systems.
Typical Applications
- Industrial automation machinery.
- Robotic safety enclosures.
- Packaging and production systems.
- Conveyor and material handling systems.
- OEM machine building applications.
- High-security machine guarding systems.
