ST DD421N2-D0T Pizzato ST D series safety sensor

Why Choose the Pizzato ST DD421N2-D0T Safety Sensor?

The Pizzato ST DD421N2-D0T is a compact and robust RFID non-contact safety sensor with coded actuator designed for monitoring guards, doors, covers and other movable machine protection systems. As part of the Pizzato ST D series safety sensors, it combines RFID detection technology with solid-state safety outputs to provide reliable position monitoring without mechanical contact between the sensor and actuator.

This safety sensor features 2 safety inputs IS1-IS2, 2 safety outputs OS1-OS2, 1 signalling output O3 and 1 programming input I3, supporting integration into modern machine safety architectures and series-connected safety systems. The non-contact operating principle eliminates the mechanical wear associated with conventional electromechanical safety switches, helping provide dependable operation in applications requiring frequent guard movement.

The ST DD421N2-D0T operates from a 10–30 V DC supply and is supplied with an integrated 2 m PVC cable. Its standard D-format actuator provides a nominal 12 mm actuation distance and uses a low coding level, while the technopolymer sensor housing offers IP67 and IP69K protection for demanding industrial environments.

Key Advantages

• Non-contact RFID safety sensing technology eliminates mechanical actuator wear.
• 2 safety inputs and 2 safety outputs support integration into advanced machine safety circuits.
• Dedicated O3 signalling output and I3 programming input provide additional control and diagnostic functionality.
• Standard D-format actuator provides a 12 mm actuation distance.
• Low-level coded actuator provides straightforward replacement and installation.
• IP67 and IP69K protection supports use in demanding and washdown-prone industrial environments.
• Integrated 2 m PVC cable simplifies electrical installation.

Key Features

• Pizzato ST D series RFID safety sensor.
• 10–30 V DC supply voltage.
• 2 safety inputs IS1-IS2.
• 2 safety outputs OS1-OS2.
• 1 signalling output O3.
• 1 programming input I3.
• Low coding level RFID actuator.
• 12 mm actuator actuation distance.
• Standard actuator measuring 45 × 25 × 18 mm with front and side fixing.
• Technopolymer housing with connection output from the right.
• Integrated 2 m PVC cable.
• Operating temperature range from -25 to +70 °C.
• IP67 according to EN 60529 and IP69K according to ISO 20653.

Reliable Non-Contact Guard Monitoring for Industrial Automation

RFID safety sensors such as the Pizzato ST DD421N2-D0T monitor the position of movable guards without requiring physical contact between the sensor and actuator. When the coded actuator enters the sensor's safe activation zone, the safety outputs can enable the associated machine safety circuit. Moving the actuator outside the permitted detection zone causes the safety outputs to switch state so that the safety control system can initiate the required protective action.

The ST D series is designed for modern automated machinery where reliability, compact dimensions and resistance to harsh environmental conditions are important. The ST DD421N2-D0T's dual safety inputs and outputs enable flexible integration into machine safety systems, while the signalling output can provide useful status information to PLC or automation equipment. Its non-contact construction is particularly advantageous on guards subject to frequent opening, vibration, contamination or alignment variation.

Typical Applications

• Machine guard and access door monitoring.
• Industrial automation and robotic cells.
• Packaging and processing machinery.
• Conveyor and material handling systems.
• Machine tools and manufacturing equipment.
• Production lines with frequently operated safety guards.
• Food, beverage and other applications requiring robust environmental protection.
• OEM machinery and integrated safety systems.