American Fibertek MX-481T-SC User Manual
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FIBER INPUT / OUTPUT CONNECTIONS
The fiber optic connections are made via SC connectors located on the left side of the unit. Follow the
label on unit for proper orientation of the fiber input and output cables. The optical port labeled ‘B’ is
connected to the fibers coming from the host/master end of the link. The optical port labeled ‘A’ is
connected to the fibers leading to the repeaters further downstream. Therefore, if this unit is the end
fiber unit, only the ‘B’ fiber port will be used. If this unit is connected via copper data wires to the
host/master device for this application, only the ‘A’ fiber port will be used. Also, please note that for
each port FIBER OUT of this unit will become FIBER IN at the corresponding unit.
The drawing below illustrates the fiber connections for a typical application connecting a RS485 host
device with two remote RS485 devices.