Product Description:

The 7DI645.7 is a digital input module that plugs into the System 2003 Controllers series from B&R Automation. It offers eight discrete sensing points so proximity switches, pushbuttons, or limit sensors can be connected directly to the controller backplane. Within an automation cell, this part converts 24 V field signals into logic-level data, allowing the CPU to monitor on and off states without additional wiring hardware. Because the module shares the mechanical format of the rest of the rack, installation involves sliding it onto the carrier rail and engaging the bus connector, so no external cabling is required on the rear.

The module includes a hardware input filter of 50 ms or less to suppress contact bounce and short transients. It also provides channel-to-PLC isolation, which separates the field supply from internal logic even though the individual channels are not isolated from one another. All 8 digital inputs are scanned through this barrier while drawing only 0.2 W, which helps minimize heat rise inside compact cabinets. Diagnostic data are transmitted through the backplane, and the unit includes supply monitoring so the CPU receives an event if the field supply drops. For quick troubleshooting, each channel has an LED that lights when an input is active, and an additional LED shows the status of the incoming 24 V rail.

The single-slot footprint saves space because the housing is a System 2003 single-width type that occupies just 12.5 mm on the DIN rail. Its enclosure meets the IP20 category, so it is intended for closed control panels. Visual feedback is provided by I/O function per channel lights and a dedicated I/O supply light, so wiring status can be checked directly from the module face. The narrow housing helps preserve panel space, while the front indicators make operating status easier to verify during normal use.