871C Miniature Inductive Sensors Allen Bradley 871C series miniature inductive proximity sensors are self-contained, solid-state devices designed to sense the presence of ferrous and non-ferrous metal objects without touching them. These small-barrel sensors are designed for space-critical applications where standard-size sensors simply will not fit. IO-Link enabled sensors offer advanced features and diagnostics including Automatic Device Configuration, multiple profiles, trending, descriptive tags, and device-specific parameters Features and Benefits IO-Link communication Three wire operation 3 conductor, 3-pin pico or 3 pin 6 in lead 3 mm, 4 mm, and 5 mm barrel diameters 10 V dc to 30 V dc Normally open contacts False pulse, transient noise, reverse polarity and short circuit protections