B&R Industrial Automation 3IF671.9 Interface Module

The B&R 3IF671.9 is a network-capable interface module for the System 2005 platform that adds serial and CAN connectivity to a controller in a compact, plug‑in format. It installs in the CPU and interface-module slot and provides one RS232 interface, one RS485/RS422 interface, and one electrically isolated CAN interface for field devices and networks. Both serial channels use standard 9‑pin D‑type connectors and support common industrial signaling, enabling reliable communication with sensors, actuators, and other controllers over point‑to‑point or multi‑drop configurations. With isolation between the host and each interface, the module helps protect the controller from ground loops and noise in harsh industrial environments, while its network-capable design integrates smoothly into B&R control networks and fieldbus setups. As part of B&R’s 2005 module family, the 3IF671.9 is designed to operate within the same backplane ecosystem as other IF modules, delivering predictable timing and compatibility for legacy installations that rely on RS232, RS485/RS422, and CAN communications. In short, it’s a single, versatile interface module that consolidates critical serial and CAN connections in a standard, slot‑based arrangement for industrial automation applications.