Product Description:

The DI486A/3 digital input module is manufactured by B&R Automation and belongs to the DI Digital Input PLC Modules series. It converts sensor signals into logic levels recognized by the controller, expanding I/O capacity on machine-level systems. Proximity switches, buttons, and other standard field devices connect directly to the carrier, so no additional controller chassis is required. The unit fits onto compact I/O frames and supplies diagnostic data for each channel.

Across two banks of 16 channels, the module offers 32 discrete input points that accept a nominal field supply of 24 VDC. A logic high is recognized when the applied voltage exceeds >15 V, while a logic low is assured below <5 V. Each channel passes through a hardware filter, so transient edges shorter than the 1 ms delay are ignored. The input circuit can operate in sink or source wiring modes, allowing sensors to source or sink current. Group isolation is provided between the two banks, and PLC isolation separates the electronics from the backplane. Inputs are arranged as 2 × 16 for structured cabling, and the board draws only 1.2 W from the internal supply.

The module’s protection and overvoltage limits support reliable cabinet integration. The housing carries a protection rating of IP20, making it suitable for mounting inside enclosed panels where dust and accidental contact must be controlled. Channel front-end networks present an impedance of 6 kΩ, limiting current draw from delicate sensor outputs. Continuous operation is allowed up to 30 VDC, and one-shot peaks can be tolerated to 500 V for 50 µs with a minimum repeat period of 100 ms, helping the board withstand inductive kickback and cable surges. These limits support safe wiring practices and help the module operate alongside solenoid drivers and other noisy loads on the same machine supply.