timberland,
I'm using a DataLink GW1000-ABEIP-DH-485 to talk from my programming workstation (RsLogix 500, RSLinx) to my network of seven SLC500/03s on a DH485 network. This was to replace a PKTX card in an old workstation. No problems with the device, has been operating for three months now, and the tech support was helpful.