Stange SE-707, Руководство по эксплуатации

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Program Controller SE-707
© 2018 by STANGE Elektronik GmbH
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Subject to technical modifications
If your device or your card is linked with only one other device on the bus, both devices must be connected to the ends of the
bus line. The reason is that these devices must deliver the supply voltage for the termination resistors. If three or more
devices are connected to the bus, the Master device can be connected at any desired position.
Figure: PROFIBUS Network
Up to 32 PROFIBUS devices can be connected to one bus segment. If several bus segments are linked to each other with
repeaters, there can be up to 127 devices on the network at maximum.
The maximum permissible cable length of a PROFIBUS segment depends on the baud rate used, see the following table.
Baud rate in kBit/s Max. distance
9,6 1.200 m
19,2 1.200 m
93,75 1.200 m
187,5 1.200 m
500 400 m
1.500 200 m
3.000 100 m
6.000 100 m
12.000 100 m
Table: PROFIBUS Segment length in dependence of the baud rate
Only PROFIBUS certified cable, preferably the cable type A, should be used.
The following table contains the most important electrical data concerning PROFIBUS certified cable:
Parameter Value
Impendence 150 Ω ± 15 Ω
Capacity per units
length
< 30 pF/m
Loop resistance 110 Ω/km
Wire gauge 0,64 mm
Table: Characteristics of PROFIBUS certified Cable