B&B USB TO ISOLATED RS-232/422/485 - 4 PORTB&B USB to Isolated RS 232 422 485 4 Port Meet the B&B USB to Isolated RS 232 422 485 four port adapter, a rugged, industrial grade solution engineered for reliability in harsh environments. The USR602 and USR604 models fuse a durable metal enclosure with four configurable serial channels, delivering flexible connectivity for RS 232, RS 422, and RS 485 configurations (2 wire and 4 wire) at speeds up to 921. 6 Kbps. With built in Modbus support and
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