Westermo ODW-641 - Manual (Page 19)

19 6650-2291
LED indication under normal operation
Data from the PROFIBUS master is received at the ODW-641 electrical port (as indi-
cated by the DPR LED), data rate is automatically detected (as indicated by the BA LED),
data bits are retimed according to the determined rate and sent out on the optical fibre
at CH 1.
The ODW-641 slave unit receives data at optical fibre CH 1 (as indicated by the FR
LED), data rate is automatically detected (as indicated by the BA LED) and data is sent
out on the electrical port.
Responses from the PROFIBUS slaves are processed in the same fashion and sent back
to the PROFIBUS master in the opposite direction.
ODW-641
RX1
TX1
PROFIBUS
Slave
ODW-641
TX1
RX1
PROFIBUS
Master (PLC)