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Allen Bradley Guardmaster Safety Relays 440N-Z21U26A

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440N-Z21U26A

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The 440N-Z21U26A non-contact interlock switch by Allen Bradley is a key component in the safety relay series known as Guardmaster. Designed for reliable operation, it features two PNP safety outputs and one auxiliary output to meet various safety demands.

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Not an Authorized Distributor: DO Supply is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All of our products come with DO Supply's 2-year warranty.
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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for 440N-Z21U26A

ManufacturerAllen Bradley
Product TypeNon-Contact Interlock Switch
Product LineGuardmaster Safety Relays
Part Number440N-Z21U26A
Weight0.56 lbs (0.26 kg)
UPC612598827862
Cable Type18 mm Plastic Cylindrical Barrel
Housing Type18 mm Dia Plastic Barrel / 18 mm Dia Plastic Unique Coded Actuator
Actuator Type18 mm Plastic Barrel with 30 mm Plastic Unique Code Actuator
Safety Outputs2 × PNP Safety Outputs
Auxiliary Output1 × PNP Auxiliary Output
LED Indication for Door Status and TroubleshootingYes
Cable Length3 m
Indicator TypeLED Indicator
Max. Operating Humidity80% RH (Non-Condensing)
Max. Storage Humidity80% RH (Non-Condensing)
Max. Operating Altitude1000 m above sea level
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The Allen Bradley 440N-Z21U26A serves as a non-contact interlock switch within the Guardmaster safety relay series. Notably, this switch includes two safety outputs configured as PNP, ensuring safe operations in various applications. It also provides an auxiliary output, which adds to its functional capabilities in safety systems. The housing is an 18 mm diameter plastic barrel combined with a uniquely coded actuator of the same breadth. Additionally, the actuator extends into a 30 mm plastic distinctive code actuator for improved security.

With a standard projection cable measuring 3 meters, the switch allows for flexible installation in diverse settings. An integrated LED indicator enhances visibility by displaying the status of the door and assisting in troubleshooting any issues. This device is designed to operate effectively within a humidity level of 80% RH (non-condensing), both during operation and while in storage. Furthermore, it maintains functionality at altitudes up to 1000 meters, making it appropriate for varied environments. Overall, the 440N-Z21U26A provides essential features for safe equipment operation, streamlining the implementation of safety protocols.