ST GD420N3 Pizzato ST G series safety sensor

Why Choose the Pizzato ST GD420N3 ST G Series Safety Sensor?

The Pizzato ST GD420N3 is a compact and highly reliable RFID safety sensor designed for non-contact monitoring of guards, doors and access points on industrial machinery. As part of the advanced Pizzato ST G series, it combines RFID-based actuator detection with redundant safety electronics to provide dependable machine guarding in modern industrial automation systems.

The ST GD420N3 features two safety inputs IS1–IS2, two safety outputs OS1–OS2, one signalling output O3 and one programming input I3. This programmable configuration supports integration into sophisticated machine safety architectures and allows compatible Pizzato safety devices to be connected in series while maintaining high levels of functional safety when the complete system is correctly designed.

Operating from a 24 V DC supply, the sensor uses a durable PVC cable connection and a compact symmetrical technopolymer housing. The ST G platform also provides IP67 and IP69K protection, a wide -25 to +70 °C ambient operating range and multicolour status indication, making it suitable for demanding machinery, production and processing environments.

Key Advantages

• Compact RFID safety sensor for machine guarding and safety interlocking.
• Non-contact operation reduces mechanical wear compared with conventional electromechanical guard switches.
• Two safety inputs and two safety outputs support integration into safety chains.
• Programmable I3 input provides additional configuration flexibility.
• 24 V DC operation suits standard industrial control and safety systems.
• IP67 and IP69K protection supports operation in demanding industrial and washdown environments.

Key Features

• Pizzato ST G series RFID safety sensor.
• 2 safety inputs IS1–IS2.
• 2 safety outputs OS1–OS2.
• 1 signalling output O3.
• 1 programming input I3.
• 24 V DC supply voltage.
• PVC cable electrical connection.
• Compact symmetrical technopolymer housing.
• 22 mm mounting-hole spacing for straightforward installation.
• Multicolour RGB status LED for rapid operating-state diagnostics.
• Compatible with ST series RFID actuators.

Reliable Safety Monitoring for Industrial Automation

RFID safety sensors such as the Pizzato ST GD420N3 provide non-contact monitoring of movable machine guards. The electronic sensor detects a compatible RFID actuator and communicates the guard state through its safety outputs, allowing the connected safety controller to initiate an appropriate safe machine response when a guard is opened or the actuator moves outside the permitted detection area.

The ST G series has been developed for machine builders requiring compact dimensions, flexible mounting and dependable electronic guard monitoring. Its symmetrical housing can be rotated for installation on left- or right-opening guards, while redundant electronics, series-connectable safety inputs and outputs and robust environmental protection make the range suitable for modern automated machinery and production systems.

Typical Applications

• Machine guard doors and access panels.
• Industrial production and assembly machinery.
• Robotic cells and enclosed automation systems.
• Packaging and processing equipment.
• Food and pharmaceutical production machinery.
• Safety systems using safety PLCs and safety modules.