Why Choose the Pizzato NSL4SR1SMK-F41 Safety Interlock Switch?
The Pizzato NSL4SR1SMK-F41 is a high-performance RFID safety interlock switch with guard locking designed for advanced industrial machine safety applications. It belongs to the robust Pizzato NS NS-series safety locking switch family, engineered to deliver secure actuator recognition, high-reliability solenoid locking, and continuous safety monitoring for automated systems.
This model features a de-energised solenoid locking mechanism combined with high-level RFID coding (F41), ensuring strong resistance against tampering and guaranteeing that machine guards remain securely locked during hazardous operation. It is designed for compliance with modern functional safety standards such as EN ISO 14119 in industrial automation environments.
With its compact technopolymer housing, industrial-grade sealing, and high protection rating, the NSL4SR1SMK-F41 is widely used in robotic cells, packaging machinery, conveyors, and OEM equipment where reliable guard locking and safety interlocking are required.
Key Advantages
- High-security RFID-coded actuator system (F41 coding level) for strong anti-tamper protection.
- Solenoid guard locking with fail-safe de-energised release principle.
- Dual safety outputs (OS1/OS2) for redundant monitoring of guard status.
- Integrated diagnostic outputs for actuator and lock status (O3/O4).
- Supports series connection in safety chains for PL e / SIL 3 systems.
- Designed for integration into modern industrial automation architectures.
Key Features
- Pizzato NS-series safety interlock switch with locking.
- Model: NSL4SR1SMK-F41.
- RFID-coded high-level actuator recognition (F41).
- De-energised solenoid guard locking (fail-safe design).
- M12 12-pole industrial connector interface.
- Safety outputs OS1/OS2 with diagnostic signals O3/O4.
- Auxiliary release function for maintenance and emergency access.
Reliable Machine Guarding and Safety Control
The Pizzato NSL4SR1SMK-F41 ensures machinery only operates when protective guards are correctly closed and locked. When the RFID-coded actuator is detected and the locking system is engaged, the safety outputs enable 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 diagnostics monitor actuator status and lock condition, supporting integration into PLC-based safety architectures in industrial automation systems.
Typical Applications
- Robotic safety cell enclosures.
- Industrial automation machinery.
- Packaging and production systems.
- Conveyor and material handling equipment.
- OEM machine building applications.
- Safety-critical industrial environments.
