Pepperl+Fuchs IC-KP2-1HB6-V15B Manual page 19

IC-KP2-1HB6-V15B
Installation
5.4.6 Cables
The bus line is specified in EN 50170 as line type A. It can be used in accordance
with the following table. The line parameters and lengths for line type B are also
specified in the two following tables. When planning a new plant, only line type A
should be used because of the higher total line length.
The line parameters are as follows:
Parameter
Cable construction
Distributed capacitance [pF/m]
Ripple resistance []
Loop resistance [/km]
Wire cross-section [mm]
Line cross-section [mm
*No longer use line type B if possible.
Note!
Use only screened, twisted-pair cables. The best possible EMC interference
immunity can only be achieved by using screened cables.
5.4.7 Transfer rates and line lengths
The permitted length of the transfer line in a bus segment is largely determined by
the following parameters:
■
■
■
■
The maximum total line length of a bus segment, depending on the transfer rate
with the maximum number of stations (32) totals:
Baud rate in kbit/s
Line type A (in m)
Line type B (in m)
Note!
The transfer length can be increased with the distribution among multiple bus
segments and the use of repeaters. A maximum of three repeaters can be used
between two communicating nodes.
2
]
Type of bus cable used
Transfer rate
External interference
Number of nodes
9.6
1200
1200
Line type A
two-wire, twisted, screened
< 30
135 ... 165
110
> 0,64
> 0.34
19.2 93.75 187.5
1200 1200 1000
1200 1200 600
Line type B*
< 60
100 ... 130
---
> 0,53
> 0.22
3000,
6000,
500 1500 12000
400 200 100
200 --- ---
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