Schneider Electric AS-B855-016 Low Input Module

Schneider Electric's Modicon AS-B855-016 is a 16-point intrinsically safe 12 VDC input module for the 800 Series I/O backplane, designed to bring field signals from low-voltage devices into a Modicon PLC in hazardous environments. The module provides fully isolated input channels and 16 LED indicators to show the status of each point, and it accepts 12 VDC input signals while requiring an external 12 VDC supply (±5%) capable of delivering at least 1 A; a barrier strip is included with the module. Its front‑panel footprint is listed as 2 x 10.5 x 8.3 inches, reflecting its substantial field-board size within an 800 Series chassis. Compatibility is with Schneider Electric’s Modicon 800 Series discrete I/O backplanes, and the AS-B855-016 is described in the 800 Series I/O manuals as an intrinsically safe 12 Vdc input option. Note that Schneider Electric lists AS-B855-016 as discontinued by the manufacturer, though refurbished stock remains available from certain suppliers.