The OpenLDV Network Driver is used for i.LON 10/100/600 RNI, PCLTA-20/21, PCC-10, SmartServer, and U10/U20 network interfaces.
The i.LON 10/100/600 RNI, SmartServer, and U10/U20 are supported on 64-bit Windows. The PCLTA and PCC-10 are only supported on 32-bit Windows OS.
Make sure the PCLTA/PCC-10/U10/U20/U60 are not plugged into the PC when installing the driver.
For Windows XP or 32-bit Windows, use OpenLDV 3.4.
For newer Windows (e.g., Windows 7) or 64-bit Windows use OpenLDV 5.0 Network Driver or newer.
To find the latest Network Driver go to www.echelon.com/support, click Software Downloads, type "openldv" in the search text field and hit the enter key.
OpenLDV 5.0 was the latest as of August 2015.