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Allen Bradley Bulletin 871U 871U-X8B18

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871U-X8B18

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The 871U-X8B18 is a capacitive proximity switch designed by Allen Bradley within the Bulletin 871U series. This switch operates with a voltage range of 10-30 VDC, enabling high-speed switching capabilities.

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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 871U-X8B18

ManufacturerAllen Bradley
Product TypeProximity Switch
Product LineBulletin 871U
Part Number871U-X8B18
Sensor TypeCapacitive
CablePrewired Cable
Wiring4/6 Wire
Operating FrequencyHigh-speed switching
Voltage10-30 VDC
HousingIndustrial, tubular
Output ModeNPN / PNP Selectable
Environmental RatingIP67
Output TypeN.O. / N.C.
Mounting StyleFlush or non-flush
Sensing Distance8 mm
MaterialPlastic / Metal housing
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The Allen Bradley 871U-X8B18 proximity switch represents a precise solution for detecting objects in automation systems. As a capacitive sensor, it effectively identifies non-metallic targets at a sensing distance of 8 mm. Operating across a voltage range of 10 to 30 VDC, this device supports high-speed switching, making it ideal for dynamic applications.

Designed with an industrial tubular housing, the proximity switch combines plastic and metal materials to ensure resilience in harsh environments. Its IP67 environmental rating confirms its ability to withstand dust and moisture, adding to its reliability. The 4/6 wire configuration simplifies connections, while the prewired cable facilitates quick installation. Moreover, the output type can be set as normally open (N.O.) or normally closed (N.C.), depending on the requirements of the application. The output mode is selectable between NPN and PNP, offering flexibility for various circuit configurations.

The versatility in mounting options, either flush or non-flush, allows for adaptability in diverse installation scenarios, further emphasizing the switch's functionality. Overall, the 871U-X8B18 is engineered to deliver efficient and consistent performance in sensing applications, aligning with industrial automation standards.