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8.6 PROFIBUS DP cable lengths
The length of the PROFIBUS cable connected to the repeater channels should comply with the PROFIBUS DP
cable specifications for RS-485-IS.
Baudrate (kbps)
Segment length (m)
PROFIBUS DP
8.7 PROFIBUS DP cable specifications
The cable should comply with the PROFIBUS DP cable specifications for RS-485-IS.
Table 7 - PROFIBUS DP cable specifications
Parameter
Value
Wires
2 (twisted)
Impedance
135..165 Ohms at 3..20 MHz
Capacity
≤ 30 pF/m
Loop resistance
≤ 110 Ohm/km
ComBricks User Manual v6.4.0 | January 18| © PROCENTEC
9.6
19.2
45.45
1200
1200
1200
Example: 1000 m cable per channel at 187.5 kbps
PROFIBUS DP-IS
Max. 31 devices
11
12
93.75
187.5
500
1200
1000
400
13
Parameter
Value
Wire diameter
≥ 0.64 mm
Wire area
≥ 0.34 mm
Shielding resistance
≤ 9.5 Ohm/km
1500
200
14
15
2
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