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Examples:
T = ON
Fig. 86 – PA segment using one connector
T = ON
Fig. 87 - PA segment with a stub line
12.5.2 Cable specifications
Use the correct cable for your project.
Table 9 shows the cable specifications for PROFIBUS PA. If a cable is not compliant with these specifications,
the reliability of the installation may become unstable.
Table 9 - Cable specifications
Characteristic
Cable design
Maximum conductor cross section (nominal)
Loop resistance (direct current)
Impedance (31,25 kHz)
Attenuation (39 kHz)
Capacitive asymmetry
Max. propagation delay change (7.9 to 39 kHz)
Max. shield coverage
Cable length
ComBricks User Manual v6.4.0 | January 18| © PROCENTEC
T = AUTO ON
T = AUTO ON
T = OFF
Specification
Twisted pair, shielded
0.8 mm² (AWG 18)
44 Ohm/km
100 Ohm ±20%
3 dB/km
2 nF/km
1.7 µsec/km
90%
1900 m
131/219
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