Description
Key Technical Specifications
- Product Model: AN-X2-AB-DHRIO
- Brand: ProSoft Technology
- Product Type: EtherNet/IP to DH+ / Remote I/O gateway
- Ethernet Port: RJ45, 10/100 Mbps EtherNet/IP
- DH+ / RIO Port: DB9-style network connector
- Supported DH+ Baud Rates: 57.6K, 115.2K, 230.4K baud
- Power Supply: 24 VDC, 500 mA
- Dimensions: 127 x 76 x 25.4 mm
- Weight: 227 grams
- Operating Temperature: 0°C to 50°C
- Storage Temperature: -40°C to +85°C
- Humidity: 5% to 95% non-condensing
- Configuration: Built-in web server for setup, diagnostics, and file upload
PROSOFT AN-X2-AB-DHRIO
Product Introduction
You usually find the AN-X2-AB-DHRIO in plants where the control room has moved to Ethernet/IP, but the floor still runs on 20- or 30-year-old DH+ and Remote I/O hardware. It sits between modern Allen-Bradley PACs — ControlLogix, CompactLogix, SLC 5/05, RSLinx Ethernet Devices drivers — and legacy DH+/RIO devices such as PLC-5 processors, SLC 500, PanelView terminals, drives, and FLEX I/O adapters.
The value is practical: it lets you keep existing legacy hardware online while moving data into a modern Ethernet/IP architecture. That matters when a full PLC-5 or RIO rack replacement would mean massive rewiring, downtime, and validation work. It supports 57.6K / 115.2K / 230.4K baud, runs on 24 VDC / 500 mA, and is configured through a built-in web server — which is a lot easier than chasing serial setup tools during a midnight fault.
Troubleshooting Quick Reference
| Fault | Likely Cause | Quick Check | Fix |
|---|---|---|---|
| No power / LEDs dead | 24 VDC supply issue | Measure at 3-pin Phoenix power connector | Confirm 24 VDC, polarity, and 500 mA capacity |
| NS / NET LED not solid green | DH+ termination or cabling | Check DH+ network LEDs and cable length | Add 150-ohm resistors for 57.6K/115.2K; use 82-ohm for 230.4K |
| Intermittent DH+ faults | Bad trunk line or loose DB9 | Inspect DH+ connectors and cable routing | Reseat connectors; avoid long unsupported runs |
| EtherNet/IP device not seen | IP, subnet, or RSLinx driver mismatch | Ping gateway; check RSLinx driver | Use Ethernet Devices driver with gateway IP |
| MSG commands fail | Wrong path, node, or file address | Check ControlLogix/CompactLogix MSG config | Verify DH+ node address and data file mapping |
| Gateway reachable but no data | Firmware/config mismatch | Open web server diagnostics | Reload or verify AN-X2 configuration file |
PROSOFT AN-X2-AB-DHRIO
Application Scenarios & Pain Points
- Refining / Oil & Gas: Legacy PLC-5 or SLC racks still running critical auxiliary skids, but the main DCS/PLC layer has migrated to EtherNet/IP. The pain is getting historical process data and alarms into the modern system without replacing field I/O.
- Water / Wastewater: Remote pump stations built around old DH+ PLCs need to report flow, pressure, and status to a newer SCADA network. Rewiring every site is not realistic.
- Metallurgy / Heavy Manufacturing: Aging drive and RIO networks sit next to newer ControlLogix controllers. The bottleneck is token-passing DH+ traffic, not the process itself.
- Cable / Packaging Manufacturing: Multiple legacy PLC-5 controllers must feed process data into a central ControlLogix system for monitoring, reporting, and quality analysis.
- Plant Migration Projects: The goal is phased modernization. Replace what is failing, bridge what still works, and avoid a full blackout upgrade.
