Compatibility: RS232C standard and RS485/RS422 standard Interface RS232 side: DB9 female connector Interface RS485/RS422 side: DB9 male connector with optional (included) terminal board Transmission rate: 300 to 115,200bps Transmission distance: RS422 maximum 1200m, RS232 side maximum 5m Working modes: asynchronous, duplex and differential transmission Working environment: 0 to 70°C Relative humidity 5 to 95% Mechanical dimensions: 95 x 33 x 17mm Package list RS232 serial to RS485/RS422 Card x1