Guardmaster Non Contact Switch (440N-Z21S17B)

The Allen-Bradley Guardmaster 440N-Z21S17B is a non-contact RFID safety switch designed for high-integrity guard door monitoring in industrial safety systems. Using RFID technology, it ensures tamper-resistant operation with unique actuator coding, making it ideal for applications requiring reliable protection against bypass and manipulation.

This Allen-Bradley 440N-Z21S17B safety switch operates on 24V DC and provides two safety outputs (PNP) for secure signal transmission. Its IP69K-rated housing offers maximum protection against dust, water, and cleaning agents, ensuring dependable performance in harsh or hygienic environments such as food, packaging, and manufacturing industries.

Easy to install with an M12 connector and compact housing, the Guardmaster 440N-Z21S17B combines RFID safety technology, non-contact sensing, and high durability—making it the perfect choice for modern machine safety and industrial automation applications.

Key words: Allen-Bradley 440N-Z21S17B, Guardmaster safety switch, RFID non-contact switch, machine safety, industrial automation, IP69K, 24V DC, PNP outputs, safety sensor, guard door monitoring.

Supply Voltage: 24V DC
Safety Contacts: 2NC
Housing Material: Stainless Steel
Connection Type: 10 m Cable
Actuator Type: Coded
Auxiliary Contacts: 1 NO
Sensor Principle: RFID
Safety Category: 4
Actuator Included: Yes
Series: 440N
Range: Sensaguard
Switching Distance: 10 mm
IP Rating: IP69K
Length: 67.06 mm
Width (Dia): 18 mm