ST HE420MP Pizzato ST H series safety sensor

Why Choose the Pizzato ST HE420MP Safety Sensor?

The Pizzato ST HE420MP identifies the M12-connected platform of the Pizzato ST H series RFID safety sensor family, designed for non-contact monitoring of guards, doors and access points on industrial machinery. The HE420 configuration combines RFID actuator detection with permanent magnetic holding and a programmable electronic safety architecture for machine guarding, safety interlocking and industrial automation.

The ST HE420 architecture provides two safety inputs IS1–IS2, two safety outputs OS1–OS2, one signalling output O3 and one programming input I3. This combination supports integration into compatible safety control systems and series-connected guarding architectures, while RFID non-contact operation avoids mechanical engagement between the sensor and actuator.

The MP connection version uses an integrated M12 technopolymer connector and operates from a 24 V DC supply. Depending on the complete actuator and magnet configuration selected, ST HE420MP variants are available with different RFID coding and magnetic holding-force options, while the family provides an 11 mm actuation distance, IP67 / IP69K protection and an operating temperature range of -25 °C to +70 °C.

Key Advantages

• Non-contact RFID safety sensing reduces mechanical wear associated with conventional mechanically actuated switches.
• Two safety inputs IS1–IS2 support integration into compatible series-connected safety architectures.
• Two safety outputs OS1–OS2 provide electronic safety signalling to compatible safety controllers.
• Dedicated O3 signalling output and I3 programming input support diagnostics and programmable functionality.
• Permanent magnetic holding helps retain compatible machine guards in their closed position during normal operation.
• Integrated M12 technopolymer connector simplifies installation, maintenance and sensor replacement.
• IP67 and IP69K protection supports installation in demanding industrial environments.

Key Features

• Pizzato ST H RFID safety sensor series.
• 24 V DC supply voltage.
• RFID coded non-contact detection technology.
• 2 safety inputs IS1–IS2.
• 2 safety outputs OS1–OS2.
• 1 signalling output O3.
• 1 programming input I3.
• Programmable HE420 electronic configuration.
• 11 mm actuator actuation distance.
• Integrated M12 technopolymer connector.
• Technopolymer ST H series housing with permanent magnet.
• Compatible ST H actuator dimensions of 90 × 25 × 18 mm with lateral fixing.
• IP67 / IP69K environmental protection.
• Multiple coding and magnetic holding-force configurations available within the ST HE420MP family.

Reliable Safety Monitoring for Industrial Automation

The Pizzato ST HE420MP platform uses RFID technology to monitor movable machine guards without requiring mechanical engagement between the sensor and actuator. When the correctly configured actuator enters the sensor's operating range, the dual electronic safety outputs communicate the guard condition to the connected safety controller, supporting dependable machine safety monitoring.

The HE420 architecture adds two safety inputs and an I3 programming input alongside its dual safety outputs and O3 signalling output, making it suitable for more sophisticated guarding systems. Permanent magnetic retention helps keep the associated guard closed during normal operation, while the final coding level and magnetic holding force are determined by the complete ST HE420MP variant selected.

Typical Applications

• Machine guard and safety-door monitoring.
• Safety interlocking systems.
• Automated production and assembly machinery.
• Robot cells and robotic manufacturing systems.
• Packaging and processing equipment.
• Conveyors and material handling systems.