Allen-Bradley 1784-U2DHP USB to Data Highway Plus (DH+) Cable

Product Introduction

When you need to connect a modern laptop or workstation to a legacy Data Highway Plus (DH+) network, the Allen-Bradley 1784-U2DHP provides a direct and reliable solution. This USB to DH+ cable eliminates the need for internal communication cards, offering a portable interface for programming and configuration tasks. Designed for industrial environments, the 1784-U2DHP supports PLC-5 processors (excluding Classic models such as PLC-5/10, PLC-5/12, PLC-5/15, and PLC-5/25) and SLC 5/04 processors.

Technical Specifications Breakdown

The 1784-U2DHP operates with a supply voltage of 5.00V DC nominal and a maximum of 5.25V DC, drawing 125 mA of current. Power dissipation is rated at 1.575 Watts. The cable supports three communication rates: 57.6 Kbps at 3048 m (10,000 ft), 115.2 Kbps at 1524 m (5000 ft), and 230.4 Kbps at 762 m (2500 ft). An IP 30 enclosure rating protects the electronics, and the operating temperature range is 0 to 55 degrees Celsius. The cable includes LED indicators for USB power and DH+ network status, and a 3-position switch for configuring the DH+ node address.

Industry Applications

In manufacturing facilities where PLC-5 or SLC 5/04 controllers manage production lines, the 1784-U2DHP enables quick program uploads, downloads, and real-time monitoring without requiring a dedicated programming terminal. For system integrators upgrading legacy networks, this cable provides a cost-effective bridge between modern USB-equipped laptops and established DH+ infrastructure. The ability to select communication rates based on cable length ensures reliable data transfer across large plants.

Installation & Setup Guidance

To use the 1784-U2DHP, install the appropriate driver on your computer before connecting the cable. The driver creates a unique COM port for the cable. Connect the USB end to your computer and the 8-pin DIN connector to the DH+ network. The node address is set automatically on first connection. Always disconnect the cable from the USB port before changing the communication rate using the 3-position switch. The cable draws power directly from the USB port, so no external power supply is needed.

Compatibility & Integration

The 1784-U2DHP replaces the older 1784-PCMK communication adapter card and 1784-PCM6 cable. It is compatible with PLC-5 processors (except Classic models) and SLC 5/04 processors. The cable works with any computer that has a USB port and supports the DH+ protocol over RS485 wiring. For complete technical specifications, please contact BluePLC Industrial.

Selection Guide & Purchasing Advice

Before purchasing the 1784-U2DHP, verify that your target processor is supported—PLC-5 (excluding Classic models) or SLC 5/04. Ensure your computer runs a compatible operating system and that you can install the required driver. The cable does not require DIN rail mounting, making it ideal for portable use. BluePLC Industrial offers the 1784-U2DHP with fast shipping and expert support to help you integrate it into your automation system.