The CVTR-I-7520 seamlessly converts the RS232 protocol to RS485 all in one rugged, economical package. Features include auto switching baud rate of 300~115,200 BPS and a Self Tuner chip, which auto-tunes the baud rate and data format to the RS-485 network. This converter also supports 256 modules max. in one RS-485 network without repeater and 2,048 modules max. in one RS-485 network with a repeater. Power supply sold separately. Order online today!