Advantech BB-485BAT3 Serial Converter, RS-232 DB9F to RS-422/485 TB, Battery Power Option $134.40 Select
Advantech BB-422PP9TB Serial Converter, RS-232 DB9 F to RS-422 TB, Port Powered, Converts RS-232 (DB9F) to RS-422 (DB9F), Bidirectional $89.00 Select
Available Now! Advantech BB-485SD9TB Serial Converter, RS-232 DB9 F to RS-485 2W TB, Port Powered $89.00 Select