Danfoss VLT 5000 Series, Руководство по эксплуатации

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VLT® 5000/ 5000 FLUX/ 6000 HVAC/
8000 AQUA PROFIBUS
The PROFIBUS option
card
■
Cable lengths and number of nodes
The maximum cable length of a segment depends on
the transmission speed. The total cable length includes
stub lines, if applicable. A stub line is the connection
from the main bus cable to each node if a "T"
connection exists instead of a direct connection of the
main bus cable to the nodes; cf. the stub line length.
The following table shows the maximum permitted
cable lengths and the maximum number of nodes or
frequency converters with 1, 2, 3 or 4 bus segments.
Please note that a repeater switched between two
segments represents a node in both segments.
The number of frequency converters is based on
a system with only one master. In the case of
multiple masters, the number of frequency converters
must be reduced accordingly.
The total stub line length of a segment is
limited as follows:
Stub line length
Transmission speed
Max. stub line length
per segment [m]
9.6-93.75 kBaud 96
187.5 kBaud 75
500 kBaud 30
1.5 MBaud 10
3-12 MBaud none
Maximum total bus cable length
Transmission speed
1 segment:
32 nodes (31
frequency converters)
[m]
2 segments:
64 nodes (1 repeater,
61 frequency
converters) [m]
3 segments:
96 nodes (2 repeater,
91 frequency
converters) [m]
4 segments:
128 nodes (3 repeater,
121 frequency
converters) [m]
9.6-187.5 kBaud 1000 2000 3000 4000
500 kBaud 400 800 1200 1600
1.5 MBaud 200 400 600 800
3-12 MBaud 100 200 300 400
MG.90.G1.02 - VLT is a registered Danfoss trademark
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