Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | Echelon 74503R |
| Manufacturer | Echelon |
| Product Type | PCI Network Adapter / LonWorks Interface |
| Series | PCLTA-21 |
| Base Model | 74503 (RoHS variant) |
| Transceiver Type | TP/XF-1250 Twisted Pair |
| Interface | 32-bit PCI (3.3V or 5V universal) |
| Network Protocol | LonWorks (LonTalk) |
| Operational Modes | LNS NSI, MIP (OpenLDV compatible) |
| Firmware | Downloadable via host PC driver |
| Operating Systems | Windows 98/2000/XP/Server 2003 |
| Certifications | CE Mark, U.L. Listed, cU.L., RoHS Compliant |
| Form Factor | Standard PCI card |
Main Features and Advantages
Universal PCI Compatibility: The Echelon 74503R supports both 3.3V and 5V 32-bit PCI slots, ensuring compatibility with a broad range of desktop and embedded personal computers. This universal interface design simplifies inventory management and allows deployment across mixed hardware environments without requiring slot voltage verification .
Downloadable Firmware Architecture: The 74503R Echelon features downloadable memory that allows firmware updates to be applied directly from the host PC. This eliminates the need for physical access to the card or hardware modifications when new firmware versions are released, extending the useful service life of the Echelon 74503R and reducing maintenance overhead .
Dual-Mode Network Services: The adapter provides both LNS Network Services Interface (NSI) for LNS-based applications and Layer 5 MIP functionality for OpenLDV drivers. This dual-mode capability allows the 74503R Echelon to integrate with a wide spectrum of LonWorks management tools, from the LonMaker Tool to custom OpenLDV applications .
Integral TP/XF-1250 Transceiver: The Echelon 74503R includes an onboard TP/XF-1250 twisted pair transceiver, eliminating the need for external transceiver hardware. This integral design reduces cabling complexity, minimizes potential failure points, and ensures reliable signal transmission across the LonWorks channel .
Plug-and-Play Deployment: With driver support for Windows operating systems and included installation software, the 74503R Echelon supports plug-and-play operation. The accompanying control panel provides a convenient interface for setting installation parameters, diagnosing card operation, and viewing error messages .
