Allen-Bradley 1770-KF2 PLC Module

Allen-Bradley 1770-KF2 is a Data Highway/Data Highway Plus asynchronous interface module (Series B) for the PLC-5 family that bridges RS-232-C or RS-422-A serial devices to a DH/DH+ network. Designed to mount in a Bulletin 1771 I/O chassis, it provides the serial-side interface used to connect programming terminals, modems, or other devices to a PLC-5 Data Highway network. The KF2 supports either point-to-point or multi-drop configurations on the DH/DH+ network, enabling flexible legacy installations. As part of the 1770 KF2 family, it acts as a bridge between a PC or serial device and Allen-Bradley PLC-5 Data Highway networks. Key characteristics include an asynchronous serial interface compatible with RS-232-C and RS-422-A and the ability to connect to DH or DH+ networks for PLC-5 control systems. Typical applications include maintaining or integrating legacy PLC-5 installations where serial devices must communicate with the PLC-5 Data Highway, such as programming terminals or local HMIs.