Allen-Bradley 1770-KF2 Data Highway Communication Interface

The Allen-Bradley 1770-KF2 is a standalone Data Highway communication interface that bridges RS-232C or RS-422A serial devices to a Data Highway or Data Highway Plus network. This KF2 Series B module is described as linking the Data Highway (DH) or a peer communication link, enabling a serial device to communicate across a DH/DH+ network. It provides an asynchronous serial interface for connecting RS-232-C or RS-422-A signals to the Data Highway, supporting both point-to-point and multi-drop configurations to accommodate a range of network topologies. As a dedicated, stand-alone interface, the KF2 sits in a cabinet or chassis and functions as a bridge between legacy serial equipment and the Data Highway, translating protocol and signaling so data can move between asynchronous devices and the DH/DH+ backbone. This combination of a serial interface and Data Highway bridge is typical for integrating older controllers or terminals into a DH or DH+ environment without requiring a full PLC-5 or data bus upgrade, preserving existing serial devices while expanding network reach.