The 440N-Z21S17A Sensaguard Non-Contact Safety Switch by Allen Bradley Guardmaster ensures exceptional protection for equipment and machine operators.

This unit is highly tamper-resistant and dependable due to latest generation Radio Frequency Identification technology for coding and inductive technology for sensing. It has a large sensing range and tolerance to door misalignment. Designed to be installed on a machine guard door, this cost-effective non-contact switch offers a superior level of security to reduce risk of injury, damage to equipment, and overall downtime. The Sensaguard range of safety switches are perfectly suited to meet a wide range of industrial applications.

The 440N-Z21S17A unit has a 3m cable and 18mm cylindrical barrel housing made of robust stainless-steel for optimal durability. The actuator code type is standard. It features LED indication for quick, easy diagnostics and door status. The assured sensing distance for this switch is 10mm. It also has a high ingress protection rating of IP69K which ensures that it is dust-proof and can withstand powerful jets of water. This safety interlock switch is ideally suited for hinged, lift-off, and sliding guard doors.

• Stainless steel version is perfectly suited for harsh environments
• No dedicated controller is required
• Highly tamper-proof due to secure RFID sensing
• Multiple sensing directions for greater flexibility
• Highly reliable due to short-circuit and over-voltage protection
• Uses the standard proximity brackets
• LED is located on the switch for door status and fast diagnostics
• Can be connected in series with other safety components (light curtain, E-stops, key interlock switches)

IP69K rated
IEC60947-5-3
IEC61508
EN954
CE certified
UL 508 approved
TÜV certified

Rockwell Automation is a global leader in industrial automation and digital transformation, and brings smart manufacturing to life. With a long legacy of creating Allen-Bradley® integrated control and information solutions, we help make you as productive as possible. Our portfolio of sensing, safety and motor control products can support your move towards smart machine applications. Allen-Bradley® IO-Link sensors are data-enabled and communicate with all field buses, providing diagnostic and health information about the device before a machine stops, and enabling quick production changeovers through fast parameter downloads from PLCs into the device. This reduces machine downtime and increases manufacturing OEE. For safety components, products with built-in diagnostics simplify the set-up of the smart device, and reduce maintenance, leading to a more efficient, machine data-driven approach.

RFID stands for Radio Frequency Identification, which is a non-contact method of transferring digital data via radio frequency waves. Equipment with this type of wireless communication usually consist of an RFID tag, an RFID reader, and an antenna. The tag transmits data when triggered by an electromagnetic pulse from the reader. This technology is used widely in many industries, for example with tracking inventory goods, personnel tracking and identification, and restricted area access. Non-contact switches with this technology are highly tamper-proof as they cannot be manipulated, providing a higher level of security.