Product Description:

The 2DI426.6 is a digital input module produced by B&R Automation for the System 2010 Controllers series. It conditions field-mounted contact or sensor signals so the controller CPU can evaluate on/off states during machine sequencing, safety interlocks, or process monitoring. Eight electrically separated input groups organize the wiring and help limit fault propagation, while the compact module fits alongside other System 2010 cards on the same backplane to support scalable industrial I/O layouts.

The card is optimized for a nominal supply of 24 VDC, which matches the standard control voltage used in many plants and allows each channel to switch reliably without added converters. A logic high is accepted only when the incoming line exceeds >15 V, and a logic low is registered when it falls below <5 V, providing useful noise margin on long cable runs. Each input has an impedance of 4 kΩ, which limits current draw from proximity switches or NPN/PNP outputs and helps reduce heat in densely packed racks. For protection against miswiring, the circuit can tolerate up to 30 VDC without damage, and the eight groups of four inputs allow orderly distribution blocks that share common power while remaining isolated from neighboring groups.

Channel response is characterized by an input delay of 1 ms, allowing the CPU to sample fast-changing states while still filtering contact bounce. All points, listed as 32 total inputs, are separated from the internal logic by an isolation stage identified as Optocoupler, which provides both group-to-group isolation and system-to-field isolation. Within a single group of four, there is no individual channel isolation, so reaction times remain consistent across that section of the card. Signal polarity is selectable because the wiring mode supports Sink/Source connections, allowing integration with either sourcing or sinking sensors, and a second isolation barrier on the PCC side helps shield the controller from external transients.