Procentec ComBricks - PROFIBUS DP Cable Lengths; PROFIBUS DP Cable Specifications

ComBricks User Manual v6.4.0 | January 18| © PROCENTEC 94/219
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.
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
Parameter
Value
Wires
2 (twisted)
Wire diameter
≥ 0.64 mm
Impedance
135..165 Ohms at 3..20 MHz
Wire area
≥ 0.34 mm
2
Capacity
≤ 30 pF/m
Shielding resistance
≤ 9.5 Ohm/km
Loop resistance
≤ 110 Ohm/km
Baudrate (kbps)
Segment length (m)
9.6
1200 1200
19.2 1500500187.593.7545.45
200400100012001200
Example: 1000 m cable per channel at 187.5 kbps
PROFIBUS DP
Max. 31 devices
11 12 15
14
13
PROFIBUS DP-IS