The FR485 is powered by a 24VAC supply. Network RS-
485 communication is received at the input terminal,
filtered, fed into a half duplex RS-485 transceiver, where it
is converted into a TTL signal for fiber optic transmission.
Separate multi mode fibers are used for transmit and
receive. When the FR485 receives a signal via fiber, the
TTL signal is converted back to the RS-485 format and sent
out on the RS-485 communication trunk. The FR485
operates as a transparent repeater only, which does not
perform any additional routing functions and requires no
additional software configuration. Led indication is provided
on all transmit and receive fiber channels.
The FR485 is available as a single or dual channel repeater.
The single channel FR485 is used for simple point to point
repeating functions. The dual channel FR485 transmits an
incoming packet from a single twisted pair, porting to both
fiber channels simultaneously, as well as echoing any
incoming fiber signal on the other fiber channel. This allows
the dual channel FR485 to support Ring, Bus, and point to