ST HE420N5-H1TG Pizzato ST H series safety sensor

Why Choose the Pizzato ST HE420N5-H1TG ST H Series Safety Sensor?

The Pizzato ST HE420N5-H1TG is a robust RFID electronic safety interlock sensor with magnetic holding designed for reliable non-contact monitoring of guards, doors and access points on industrial machinery. As part of the advanced Pizzato ST H RFID Safety Sensor Series, it combines high-level RFID actuator coding with electronic safety inputs and outputs for dependable machine guarding and industrial automation.

Operating from a 24 V DC supply, the ST HE420N5-H1TG provides two safety inputs IS1–IS2, two safety outputs OS1–OS2, one signalling output O3 and one programming input. The dual safety inputs and outputs enable the sensor to be connected with compatible Pizzato safety devices to create flexible safety chains while maintaining high machine safety performance.

The ST HE420N5-H1TG features a high-level coded actuator with an actuation distance of 11 mm and a permanent magnet providing 50 N holding force. Its integrated 5 m cable, symmetrical housing, 78 mm mounting hole spacing and IP67 / IP69K protection make it particularly suitable for demanding industrial installations where reliable guard monitoring and magnetic holding are required.

Key Advantages

• Reliable RFID non-contact safety interlocking for industrial machine guards.
• High-level coded actuator provides enhanced protection against bypassing of the safety function.
• Permanent magnet provides 50 N holding force to help keep guards closed against vibration, recoil and air turbulence.
• 11 mm actuation distance provides practical installation and alignment tolerance.
• Two safety inputs and two safety outputs support flexible series-connected safety architectures.
• Symmetrical housing allows convenient installation on left- or right-hand guards.
• 78 mm mounting hole spacing facilitates upgrades from traditional SR B series magnetic sensors.
• IP67 / IP69K protection supports installation in demanding industrial environments.

Key Features

• Pizzato ST H RFID Safety Sensor Series.
• 24 V DC supply voltage.
• 2 safety inputs IS1–IS2.
• 2 safety outputs OS1–OS2.
• 1 signalling output O3.
• RFID coded non-contact actuator detection.
• High actuator coding level.
• 11 mm actuator actuation distance.
• Permanent magnet with 50 N holding force.
• Integrated 5 m cable.
• Symmetrical ST H series housing with 78 mm mounting hole spacing.
• Multicolour signalling LEDs visible from both sides of the housing.
• Multitag programming capability.
• IP67 according to EN 60529 and IP69K according to ISO 20653.
• Operating temperature from -25 °C to +70 °C.
• Safety performance up to PL e, Category 4 and SIL 3 when correctly integrated into the safety system.

Reliable Safety Monitoring for Industrial Automation

RFID safety sensors such as the Pizzato ST HE420N5-H1TG monitor machine guards by detecting a coded actuator without requiring mechanical contact between the sensor and actuator. Redundant electronics and dual safety inputs and outputs allow ST H sensors to form part of high-performance safety circuits while non-contact operation minimises mechanical wear during repeated machine cycles.

The ST H series combines RFID safety monitoring with magnetic holding. The 50 N permanent magnet helps keep lightweight guards closed where vibration, closing recoil or air turbulence could otherwise cause unwanted movement, while high-level RFID coding, multicolour status indication and flexible series connection support integration into modern automated machinery.

Typical Applications

• Industrial machine guard monitoring.
• Safety doors and movable access panels.
• Robotic cells and automated manufacturing systems.
• Packaging and processing machinery.
• Conveyor and material handling equipment.
• Guards exposed to vibration, recoil or air turbulence.
• OEM machine building and industrial safety systems.