Allen-Bradley 1784-U2DHP USB-to-Data Highway Plus Programming Adapter

Allen‑Bradley 1784-U2DHP USB-to-Data Highway Plus Programming Adapter is a USB interface that lets a modern PC access a Data Highway Plus (DH+) network for programming and diagnostics of legacy PLC‑5 and SLC 500 controllers. As a USB‑to‑DH+ adapter, it bridges a PC’s USB port to the DH+ network, enabling direct connection for programming, monitoring, and troubleshooting of DH+ devices. It is commonly used as a replacement for older PCMK and KT‑era cables and is designed to work with Rockwell software such as RSLinx and RSLogix for DH+ communication. The unit carries the 1784-U2DHP part number and supports the Data Highway Plus protocol, connecting to a DH+ network via its dedicated DH+ connector to interface with PLC‑5/SLC‑500 hardware.