ST DD421N5-E1T Pizzato ST D series safety sensor

Why Choose the Pizzato ST DD421N5-E1T ST D Series Safety Sensor?

The Pizzato ST DD421N5-E1T is a high-performance RFID non-contact safety sensor designed for monitoring guards, doors and protective devices on industrial machinery. As part of the Pizzato ST D series, it combines digitally coded RFID technology with redundant electronics to provide reliable machine safety monitoring and strong protection against actuator manipulation.

This safety sensor uses a high-level coded E1T large actuator, allowing the sensor to recognise its specifically associated actuator and providing a high level of coding in accordance with EN ISO 14119. Non-contact operation eliminates mechanical switching components, helping provide a long service life in machinery with frequent operating cycles while reducing wear and maintenance requirements.

The ST DD421N5-E1T operates from a 12–24 V DC supply and features two safety outputs, one signalling output, two safety inputs and one programming input. It is supplied with a 5 m PVC cable with the connection output on the right and uses the large E1T actuator with a rated operating distance of 20 mm. IP67 and IP69K protection make it suitable for demanding industrial environments.

Key Advantages

• Non-contact RFID safety sensor for industrial machine guarding.
• High-level coded E1T actuator provides enhanced protection against tampering and manipulation.
• Large actuator provides a 20 mm rated operating distance for greater installation tolerance.
• Designed for safety systems up to PL e, SIL 3 and Category 4 when correctly integrated.
• IP67 and IP69K protection for demanding industrial environments.
• Non-contact operation minimises mechanical wear and supports a long service life.

Key Features

• Pizzato ST D series RFID safety sensor.
• 12–24 V DC SELV/PELV supply.
• 2 safety outputs (OS1 and OS2).
• 1 signalling output (O3).
• 2 safety inputs (IS1 and IS2) for series connection.
• 1 programming input (I3).
• High-level coded E1T large RFID actuator.
• 20 mm rated operating distance with the E1T actuator.
• 5 m integrated PVC cable with right-side connection output.
• Four LEDs provide sensor status indication.
• Glass fibre reinforced, self-extinguishing technopolymer housing.
• Supports connection of multiple compatible safety devices in series.

Reliable RFID Safety Monitoring for Industrial Machinery

RFID safety sensors such as the Pizzato ST D series monitor the position of machine guards without requiring physical contact between the sensor and actuator. The coded actuator is detected electronically, allowing the safety system to verify that a guard is correctly positioned before hazardous machine functions are permitted.

The ST DD421N5-E1T combines redundant safety electronics with two safety inputs and two safety outputs, enabling integration into high-performance machine safety architectures and series-connected safety systems. Its high-level coded E1T actuator also helps prevent deliberate or accidental bypassing of machine guards while providing a generous operating distance for applications with alignment tolerances.

Typical Applications

• Machine guard and safety door monitoring.
• Automated production and assembly machinery.
• Robotic cells and automated manufacturing systems.
• Packaging and processing machinery.
• Machine tools and machining centres.
• Conveyors and material handling equipment.
• OEM machinery and industrial automation systems.