ABB 500 Series Builder's Manual page 77


Configuring the 56/64 kbit data
communication modules
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Av. cable length between
splices
Average number of splices
Number of repair splices
Fibre margin
Total fibre attenuation per km
Maximum optical transmis-
sion distance
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No setting is available for the short range fibre optical modem on the HMI. There are
however some settings that can be made on a DIP-switch located behind the cover
around the fibre optic connectors at the back of the terminal according to
ter the fibres have been disconnected, if attached, the cover plate can be removed by
pulling the middle of the cover plate.
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Fibre optic
connectors
Cover
plate
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3.0 km
0.33 splice/km
0.10 splice/km
RXD TXD
DSR CTS
RTS
DCD
MA
RA
LO LA
Sync Sync
On Off
1
2
3
4
Reset
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0.027 dB/km 0.027 dB/km
0.008 dB/km 0.008 dB/km
0.010 dB/km 0.010dB/km
0.265 dB/km 0.385 dB/km
60 km 41 km
figure 34. Af-
71