Lightem LFR series is a RS232/485 Optic Fiber Redundant Ring Converter which can build a double ring self healing fiber network that greatly improves the stability of the communication of RS-485/232 serial devices. It also provides either 2 channel RS-485 port or 1 channel RS-232 plus 1 RS-485 port. A two-way half duplex communication is allowed for the 2 channel RS-485 device.

When a segment of fiber is broken or a node fails, the device automatically switches the optical fiber channel, making the network still working, the communication link is unblocked, and the safety and reliability of the optical fiber communication network is greatly improved.

LFRMRS24 provides 2 channel RS-485 port or 1 channel RS-232 plus 1 RS-485 port. A two-way half duplex communication is allowed for the 2 channel RS-485 device. Each LFRMRS24 can work in the master station mode or from the slave mode by the dialing switch, but there is only one master station in the fiber ring and the other as the slave station. When LFRMRS24 is set to
Slave, the RS-232/485 port will only access slave devices.