The SW485WA is an industrial grade bi-directional port-powered 2500V optoisolated RS232 to RS485 converter in a 9 pin format. The SW485WA is an industrial grade bi-directional port-powered 2500V opto-isolated RS232 to RS485 converter in a 9 pin format. It can convert any standard full duplex RS232C port to any two-wire balanced half duplex RS485 port. In simple terms, it will convert any RS232 signal to a RS485 signal and vice versa. The unit is ..