Why Choose the Pizzato NSL4AZ1SMK Safety Interlock Switch?
The Pizzato NSL4AZ1SMK is a robust RFID safety interlock switch with solenoid guard locking, designed for industrial machine safety applications requiring reliable access control, actuator detection, and secure guard locking. Manufactured by Pizzato Elettrica, it ensures machinery remains safely isolated until hazardous conditions have been removed.
This model belongs to the Pizzato NS series safety locking switches and is part of the “L working method” family, where the actuator remains locked using a de-energised 24 Vdc solenoid. It is widely used in OEM machinery, automation systems, and robotic cells where dependable guarding and high operational safety are required.
The NSL4AZ1SMK operates with RFID-coded actuator recognition and dual-channel safety monitoring. It enables safe machine operation by ensuring that outputs are only enabled when the guard is closed, the actuator is correctly inserted, and the locking state is confirmed. {index=1}
Key Advantages
- Integrated RFID safety interlock system for reliable actuator detection.
- Solenoid guard locking with de-energised safety principle (fail-safe design).
- High protection against tampering and unintended bypass.
- Designed for OEM machinery and industrial automation systems.
- Durable technopolymer housing for demanding industrial environments.
- Supports safety architectures up to PL d / SIL 2 (system dependent).
Key Features
- Pizzato NS series safety interlock switch.
- Model: NSL4AZ1SMK.
- RFID actuator recognition system (compatible NS-F41 coding family depending on configuration).
- 2 safety inputs (IS1–IS2).
- 2 safety outputs (OS1–OS2).
- 1 actuator inserted output (O3).
- 1 actuator locked output (O4).
- 2 solenoid activation inputs (IE1–IE2).
- 1 programming/reset input (I3).
- M12 connector, 12-pole configuration.
Reliable Machine Guarding for Industrial Systems
The Pizzato NSL4AZ1SMK is designed to prevent access to hazardous machinery by keeping protective guards locked until safe conditions are confirmed. The RFID system ensures that only the correct actuator is recognised, reducing risks of bypass, tampering, or accidental machine restart.
Its safety outputs integrate with PLCs and safety controllers, enabling continuous monitoring of door status, actuator presence, and locking condition in automated production environments. {index=2}
Typical Applications
- Industrial automation systems.
- Robotic safety enclosures.
- Packaging and processing machinery.
- Machine tools with safety guarding.
- OEM equipment manufacturing.
- Material handling and conveyor systems.
