Why the ANC-120e is a Popular Alternative to the AB’s 1784-U2DHP for PLC Programming
In the Allen-Bradley industrial automation world of networking, efficient and reliable communications between PLC-5s and SLC 5/04s Programmable Logic Controllers (PLCs) is essential. AB’s 1784-U2DHP has become the go-to option for Allen-Bradley DH+ PLC Programming communications as many of the 1784 programming cards become obsolete.
Automation Networks saw an opportunity to engineer the ANC-120e, with some enhanced options, at a more reasonable $995 USD price. The ANC-120e is an attractive alternative for engineers and systems integrators wanting a more economical, yet faster throughput PLC programming cable option.
Overview of the ANC-120e
The ANC-120e is a compact USB-to-DH+ PLC programming cable designed for connecting a computer to a DH+ network. It enables seamless communication with Allen-Bradley PLCs such as the PLC-5 and SLC 5/04. The ANC-120e offers a user-friendly, feature-rich alternative that is easier to set up and maintain.
Features of the ANC-120e Over the 1784-U2DHP
RSLINX/LOGIX PLC Programming
The ANC-120e provides seamless communication with all major SCADA, HMI, and PLC programming packages using the Controllogix Ethernet/IP driver to access all DH+ nodes, including PLC-5 and SLC 5/04 controllers. This ensures efficient integration with widely used automation software such as RSLinx Classic (compatible with RSLogix 5, RSLogix 500, and RSView32), RSLinx Enterprise/FactoryTalk Linx, Avensys Intouch, and Citect & Kepware Controllogix Ethernet/IP Drivers. This broad compatibility allows engineers to work with both older and newer control environments with minimal effort.
Replacement Compatibility
The ANC-120e is designed as a direct replacement for several legacy Allen-Bradley PLC programming cards, including the 1784-U2DHP, 1784-KTX, 1784-PKTX, 1784-PCMK, and 1770-KF2. By offering a cost-effective and high-performance alternative, the ANC-120e ensures that industrial users can maintain and expand their DH+ networks without the difficulties associated with discontinued Rockwell hardware.
Enhanced USB Speed and Efficiency
Unlike older solutions that rely on slow RS232 USB conversion, the ANC-120e operates at a full 12Mb USB speed, eliminating bottlenecks and significantly improving data transfer rates for programming and monitoring tasks. This results in faster data exchange and greater reliability when configuring PLCs or monitoring industrial processes.
Convenient DH+ Connections
The ANC-120e provides flexible options for connecting to a DH+ network, making it an ideal choice for various industrial setups. Users can either utilize the 2-pin Phoenix Blue Hose connector for direct wiring to a DH+ cable or opt for an 8-pin mini DIN cable connection to directly interface with PLC ports such as CH0 on SLC 5/04 or PLC-5 processors. These multiple connection methods make installation straightforward and adaptable to different configurations.
Auto Configuration and Detection Features
To simplify deployment and reduce setup complexity, the ANC-120e incorporates several automatic features, including Auto Baud Rate Detection, which supports speeds of 57.6, 115.2, and 230.4 kBaud, Auto DH+ Node Assignment to prevent address conflicts, and Auto Polarity Detection, which eliminates the need to worry about wiring polarity. These features make it easier for engineers to integrate the device into existing systems without requiring manual adjustments.
Cost Savings
Compared to the 1784-U2DHP, which typically starts at $1,500 for used interface cards, the ANC-120e is available at a significantly lower list price of $995 USD, making it a far more affordable solution for companies maintaining DH+ networks. It also comes with a 30-day trial, no restocking charge, and a lifetime warranty.
Compact and Portable Design
Unlike the bulky 1784-U2DHP, the ANC-120e is designed as a USB stick-sized device that does not require an external power supply. This compact design enhances portability, making it particularly useful for field engineers and technicians who need a lightweight and convenient solution for PLC programming and troubleshooting.
Reliable Performance and Support
The ANC-120e is built for long-term reliability and ease of maintenance. It includes LED diagnostics for quick troubleshooting, firmware upgradeability to ensure continued compatibility with evolving systems, and a 30-day free trial with a lifetime replacement warranty in case of defects. These factors contribute to its durability and long-term value in industrial environments.
With its superior speed, automatic configuration features, broad software compatibility, and affordability, the ANC-120e is the ideal replacement for the 1784-U2DHP. It meets the demands of modern industrial environments while simplifying PLC programming, DH+ monitoring, and system integration. By offering enhanced connectivity options, automated configuration, and significant cost savings, the ANC-120e is a highly valuable tool for engineers and automation professionals working with Allen-Bradley DH+ networks.
Disadvantages of the 1784-U2DHP
The 1784-U2DHP was a widely used USB-to-DH+ adapter by Rockwell Automation, enabling communication between PCs and legacy Allen-Bradley PLCs. However, as industrial networking needs have evolved, several disadvantages of the 1784-U2DHP have become apparent. Below are some of the key drawbacks that have led many users to seek alternatives such as the ANC-120e.
High Cost
Even when available, the 1784-U2DHP is expensive compared to newer alternatives. The cost of purchasing a used or refurbished unit can exceed that of more modern solutions like the ANC-120e, which offers comparable or superior functionality at a lower price.
Complex Setup and Configuration
Unlike newer adapters that use plug-and-play installation, the 1784-U2DHP requires specific Rockwell Automation drivers and software configurations. Setting up the device often involves manual driver installation, adjusting system settings, and troubleshooting compatibility issues, making it less user-friendly.
No Automatic Configuration Features
The 1784-U2DHP requires manual configuration for node assignment, baud rate, and polarity settings. Modern alternatives like the ANC-120e feature automatic DH+ node assignment, baud rate detection, and polarity correction, reducing setup time and potential errors.
Conclusion
The ANC-120e has established itself as a superior alternative to the 1784-U2DHP due to its cost-effectiveness, ease of use, automatic configuration, and broad compatibility with modern industrial software. Its ability to seamlessly integrate with both legacy and new automation systems makes it an essential tool for PLC programming, troubleshooting, and industrial networking. As demand for reliable DH+ communication continues, the ANC-120e remains a top choice for engineers and manufacturers seeking a robust, future-proof solution.