Product Description:

B & R Automation manufactures the 3DI486.6 input module for discrete signal acquisition within the System 2005 Controllers series. Installed on the controller backplane, the unit translates field-level sensor states into logic-level data streams so that the PLC CPU can evaluate on/off conditions in real time for factory machinery, material handling, and packaging cells. This arrangement lets the controller monitor switches, photoelectric sensors, and other binary field devices without requiring analog conversion.

The module handles 32 digital channels arranged as two groups of sixteen, and each group is optically separated from the control logic to provide group isolation and PLC isolation through optocouplers. Nominal operating voltage for the field side is 24 VDC, and the dual-purpose sink/source input circuit allows either sourcing or sinking wiring schemes. With an input resistance of 6 kΩ, current draw from sensors is minimal, yet the device accepts transient voltages up to 30 VDC without damage. Signal recognition occurs when the applied level rises above the high threshold of > 15 V. Once detected, the state is transferred to the controller within a maximum delay of 1 ms. The board itself draws only 1.2 W from the 5 V backplane supply, supporting energy-efficient rack designs.

The input stage also supports stable operation in electrically noisy environments. The low threshold of < 5 V ensures clear deactivation, while typical propagation through the filter network is just 0.5 ms, supporting high-speed counting tasks. For surge events, the input stage tolerates a peak of 500 V / 50 µs without functional loss, and the front edge carries an IP20 rating that matches standard cabinet installations.