ST HD311N2-H1T Pizzato ST H series safety sensor

Why Choose the Pizzato STHD311N2-H1T Safety Interlock Sensor?

The Pizzato STHD311N2-H1T is a compact and highly reliable RFID safety interlock sensor designed for machine guarding, access control, and industrial automation safety applications. As part of the advanced Pizzato ST H series RFID safety sensor platform, it ensures secure non-contact monitoring of safety doors and protective guards in industrial machinery environments.

This model uses high-level coded RFID actuator recognition (H1T logic) to ensure that only a correctly paired actuator can enable machine operation, reducing the risk of tampering or unintended bypass. It is commonly used in OEM machinery, robotics, packaging systems, and automated production lines where functional safety and compliance with PL e (ISO 13849-1) and SIL 3 (IEC 61508) are required.

The STHD311N2-H1T features a rugged technopolymer housing with integrated N2 fixed cable connection, designed for direct wiring into machine control systems. Its non-contact RFID sensing technology eliminates mechanical wear, improving durability and ensuring long service life in high-cycle industrial environments. {index=1}

Key Advantages

• High-reliability RFID-coded safety interlock sensor for machine guarding applications.
• Non-contact operation reduces mechanical wear and maintenance costs.
• High coding level actuator recognition for improved tamper resistance.
• Designed for industrial automation and safety-critical environments.
• Compatible with safety PLC systems and modern machine safety architectures.
• Robust fixed cable (N2 type) for direct machine wiring.

Key Features

• Pizzato ST H series RFID safety sensor.
• Model: STHD311N2-H1T.
• RFID-coded actuator detection system.
• 2 safety inputs (IS1–IS2).
• 2 safety outputs (OS1–OS2).
• 1 signalling output (O3).
• High coding level actuator system.
• Actuation distance up to approx. 11 mm.
• Integrated N2 fixed cable connection.
• 24 V DC supply voltage.
• IP67 / IP69K protection rating.

Advanced Machine Safety with RFID Technology

The Pizzato STHD311N2-H1T uses RFID-coded actuator recognition to ensure that only a correctly paired actuator can enable machine operation. This significantly improves safety integrity and reduces the risk of unauthorized access in industrial environments.

According to official ST H series documentation, the 311-series variants maintain the same core safety architecture as the 310 family, with configuration differences used for specific input/output logic or application variants within machine safety systems.

The ST H platform is engineered for harsh industrial environments with IP67/IP69K protection, making it suitable for robotics, packaging machinery, CNC systems, and automated production lines.

Typical Applications

• Industrial machine guarding systems.
• Automated production lines.
• Robotics safety enclosures.
• CNC machine access doors.
• Packaging machinery.
• General industrial automation systems.