AFO485 and RFO485 USER MANUAL ref 9011509-01
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1 Overview
The family of AFO485 fibre optic modems and RF0485 fibre optic repeaters allow the
transmission of RS232/RS485/RS422 asynchronous data or a CAN bus via multimode or
single mode fibre optics.
Fieldbus network
The units allow the fibre optic transmission of PROFIBUS DP, MODBUS, UNITELWAY,
SYSMACWAY, and the majority of asynchronous protocols, as well as the extension of a
CAN network.
Local Interface
Depending on the model, the unit provides an RS232, RS422 and RS485 local interface or
a CAN interface.
Point to point, bus or failsafe ring
The AFO485 models allow point to point links.
The RFO485 models have a repeater function and allow a multidrop link or a failsafe ring
to be established.
Line modulation
The data over the Fibre optic is encoded to ensure a range of up to 28km for models
which use single mode fibres.
Transmission failure Information
In case of a cut in the fibre optic link the unit provides a « voltage free » transmission
failure output.
Double DC supply
Two power supply inputs are provided in order to back-up one of the power sources in
case of failure or to replace one power source with another without interfering with the
units functioning.