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Allen Bradley Guardmaster Safety Relays 440N-Z21S16A

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440N-Z21S16A

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The 440N-Z21S16A is a non-contact switch from Allen Bradley's Guardmaster safety relays series. Operating on 24 VDC, it has a sensing distance of 15 mm and can handle load currents up to 200 mA.

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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-Z21S16A

ManufacturerAllen Bradley
Product TypeNon Contact Switch
Product LineGuardmaster Safety Relays
Part Number440N-Z21S16A
Weight1.00 lbs (0.45 kg)
Sensing Distance15 mm
MaterialPlastic
Operating Voltage24 VDC
Frequency of Operating Cycle0.25 Hz
No-load Supply Current< 50 mA
Response Time (Off)45 ms
Load Current, Max200 mA
Sensor Case MaterialPolycarbonate
Actuator Case MaterialPolycarbonate
ProtectionShort Circuit, Overload, Reverse Polarity, Overvoltage, Loss of Ground
Ambient Operating Temperature32 to 104 degrees Fahrenheit
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The Allen Bradley 440N-Z21S16A safety relay functions as a non-contact switch with a sensing distance of 15 millimeters. It operates at a voltage rating of 24 VDC, making it suitable for various low-voltage applications. This device has a low no-load supply current of under 50 mA, optimizing energy efficiency during operation.

The relay can handle a maximum load current of 200 mA. With a frequency of operation set at 0.25 Hz, it can manage frequent cycle applications effectively. The response time for this switch is specified at 45 milliseconds, which facilitates quick disconnection when required.

Constructed from durable polycarbonate, both the sensor and actuator cases provide solid resilience against environmental factors. The 440N-Z21S16A model incorporates protective features against short circuits, overloads, reverse polarity, and overvoltage, enhancing its reliability in industrial settings. Additionally, it can function within an ambient operating temperature range from 32 to 104 degrees Fahrenheit, making it adaptable to diverse conditions.