B&B Electronics 485LDRC9 RS 485 Serial Transceiver

The B&B Electronics 485LDRC9 is an optically isolated RS-232 to RS-422/485 converter designed for DIN-rail installation in industrial control environments. On the RS-232 side it provides a single DB-9 female connector for standard RS-232 serial devices, while the RS-422/485 side uses a terminal block for A/B differential lines to connect to RS-422 or RS-485 networks. This DIN-rail mounted unit is RoHS compliant and, according to product listings, weighs about 7.2 oz, making it a compact option for panel-mounted serial interfacing and field deployments. The 485LDRC9 is marketed under B&B Electronics (now B&B SmartWorx) as an industrial isolated converter intended to extend or interconnect legacy RS-232 devices with modern RS-422/RS-485 serial networks, providing isolation between the serial domains for enhanced noise immunity and protection of equipment.