Product Details
Product Overview
The Allen Bradley 1784-U2DHP provides a high-performance bridge between modern computing hardware and legacy industrial networks. This USB-to-Data Highway Plus (DH+) adapter enables engineers to program, monitor, and troubleshoot PLC-5 and SLC 5/04 controllers directly from a laptop or workstation USB port. It replaces bulky PCMCIA cards and older serial converters, offering a streamlined, bus-powered solution for field service and factory floor diagnostics. We supply this unit as 100% brand new and original, ensuring full driver compatibility and signal integrity for your critical legacy infrastructure.
Technical Specifications
The 1784-U2DHP optimizes data throughput across varying DH+ network lengths:
| Feature | Specification |
| Interface Type | USB to Data Highway Plus (DH+) |
| Communication Rates | 57.6, 115.2, and 230.4 Kbps |
| Supply Voltage | 5.00V to 5.25V DC (USB Bus Powered) |
| Current Draw | 125 mA |
| Max Power Dissipation | 1.575 W |
| Compatible Processors | PLC-5/11, /20, /30, /40, /60, /80; SLC 5/04 |
| Status Monitoring | LED Indicators (USB Power, DH+ Network) |
| Operating Temperature | 0 to 55 °C (32 to 131 °F) |
| Enclosure Rating | IP30 |
| Net Weight | 0.38 lbs (0.17 kg) |
Engineering Advantages
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Legacy Connectivity via Modern Hardware: The 1784-U2DHP eliminates the need for obsolete desktop computers with ISA/PCI slots or laptops with PCMCIA slots. It allows modern Windows-based engineering workstations to communicate natively with DH+ networks.
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Auto-Configuring Bus Power: The adapter draws its entire power requirement (5V DC) from the host USB port. This simplifies field use by removing the need for external power bricks or specialized batteries during mobile diagnostic sessions.
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High-Speed Network Performance: The device supports the full range of DH+ speeds. It achieves 230.4 Kbps for short-range high-speed transfers (up to 762 m) and maintains reliable 57.6 Kbps communication over long-distance cable runs up to 3048 meters.
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Real-Time Diagnostic Feedback: Dual LED indicators provide instant visual verification. The "USB Power" LED confirms the host connection, while the "DH+ Network" LED flashes to indicate active data packets, allowing technicians to verify network health at a glance.
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Plug-and-Play Integration: When used with RSLinx® Classic, the 1784-U2DHP installs as a standard communication driver. This enables seamless project uploads and downloads in RSLogix 5 and RSLogix 500 without complex protocol mapping.
FAQs
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Does the 1784-U2DHP support "Classic" PLC-5 processors?
No. This adapter does not support Classic PLC-5 models such as the PLC-5/10, 5/12, 5/15, or 5/25. It works exclusively with the "Enhanced," "Ethernet," and "ControlNet" versions of the PLC-5 family, as well as the SLC 5/04.
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Is this a brand new, genuine Allen Bradley product?
Absolutely. We guarantee that every 1784-U2DHP we ship is 100% brand new in original factory packaging. Each unit carries the verified UPC 612598520114 and satisfies E-E-A-T industrial procurement standards.
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Can I use this cable with a 64-bit Windows operating system?
Yes, provided you use a compatible version of RSLinx Classic (version 2.57 or higher). The 1784-U2DHP supports 64-bit environments, making it suitable for modern industrial laptops.
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What precautions should I take regarding DH+ network termination?
The 1784-U2DHP connects as a node on the DH+ network. Ensure your network has proper 82-ohm or 150-ohm termination resistors at both physical ends of the trunk line to prevent signal reflection and ensure stable communication with the adapter.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Evolving SCADA System Architectures in Industrial Automation
A robust Supervisory Control and Data Acquisition (SCADA) system serves as the heartbeat of modern industrial operations. Understanding SCADA system architecture is vital for engineers designing efficient control systems. These architectures have evolved from isolated, monolithic structures to highly interconnected, networked ecosystems. Choosing the right design requires balancing data visibility, processing power, and long-term scalability requirements.
Choosing the Right Controller: PLC vs. Motion Controller in Industrial Automation
Selecting the optimal control architecture is a foundational decision in industrial automation. Engineers must frequently choose between a Programmable Logic Controller (PLC) and a dedicated Motion Controller. While both systems manage machinery, their underlying design philosophies differ significantly, impacting performance, scalability, and system integration.
Mastering PLC Power Supply Architectures and Operating Voltages
Selecting the correct operating voltage is a critical step in designing reliable industrial automation systems. Whether you are working with a compact PLC or a large-scale DCS, your power architecture dictates the system's longevity. In this guide, we explore the standard voltage ranges and power distribution strategies required to maintain stable factory automation operations.