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Allen Bradley Guardmaster Safety Relays 440N-Z21US2HN

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440N-Z21US2HN

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The 440N-Z21US2HN is a rectangular flat pack safety relay from Allen Bradley’s Guardmaster series, designed for reliable sensing operations. It functions effectively at an operating voltage of 24 VDC and provides an assured on sensing distance of 15 mm, along with an off sensing distance of 25 mm.

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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-Z21US2HN

ManufacturerAllen Bradley
Product TypeRectangular Flat Pack
Product LineGuardmaster Safety Relays
Part Number440N-Z21US2HN
Weight0.31 lbs (0.14 kg)
UPC612598827978
Assured On Sensing Distance15 mm
Assured Off Sensing Distance25 mm
Operating Voltage Rating24 VDC
Response Time45 ms
Frequency for Operating Cycle0.25 Hz
No-Load Supply Current<50 mA
Load Current200 mA
Voltage Drop<1.5 V
Operating Temperature Range-25 to 70°C
Operating Humidity5 to 95% (non-condensing)
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The Allen Bradley 440N-Z21US2HN is a safety relay packaged in a rectangular flat format, tailored for dependable operation in various applications. Designed to operate at a voltage rating of 24 VDC, this relay ensures reliability with assured on and off sensing distances of 15 mm and 25 mm, respectively. The device has a relatively swift response time of 45 milliseconds, providing timely status changes to any connected systems.

Operating cycles are characterized by a frequency of 0.25 Hz, making it suitable for applications requiring low-frequency sensing. In terms of power consumption, it operates with a no-load supply current of less than 50 mA, maintaining efficiency while supporting load currents up to 200 mA. The voltage drop across the device remains low at under 1.5 V, ensuring minimal power loss during operation.

This relay operates effectively within a temperature range from -25 to 70 degrees Celsius, granting it versatility in challenging environments. Moreover, it remains functional in relative humidity levels from 5% to 95% without the risk of condensation, making the 440N-Z21US2HN suitable for various industry applications that demand robust performance under differing conditions.