USB to RS485 converter with RS-232 DB9 female, RS-485 DB9 male connector/ terminal block two kinds of connectors, transmission distance 1200m for RS-485, 5m for RS-232. Its advantage is that it supports hot swap, plug and play, and fast transmission speed.
2 port USB to RS485 converter with 300bps-115.2Kbps baud rate, 5000m (9600bps) transmission distance, rated power 9-30VDC/ 350mA, DB9 female to 10-pin terminal block connector. It is generally used in mechanical control systems, access control systems, industrial automation, industrial control, security monitoring, equipment debugging, upgrades, etc.