Moxa USB to Serial – UPort 1130/1130I 1-port RS-422/485 USB-to-serial converters
http://www.moxa.com/product/UPort_1130_1130I.htm
Manuals for UPort 1130/UPort 1130I
http://www.moxa.com/support/sarch_result.aspx?type=doc&prod_id=204&type_id=7
UPort 1100 Series User’s Manual – UPort_1100_Series_Users_Manual_v7.pdf
http://www.moxa.com/doc/man/UPort_1100_Series_Users_Manual_v7.pdf
UPort 1100 Series USB-to-Serial Converter Quick Installation Guide – UPort_1100_QIG_v5.pdf
http://www.moxa.com/doc/man/UPort_1100_QIG_v5.pdf