Procentec ComBricks User Manual

ComBricks User Manual v6.4.0 | January 18| © PROCENTEC 131/219
Examples:
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
Specification
Cable design
Twisted pair, shielded
Maximum conductor cross section (nominal)
0.8 mm² (AWG 18)
Loop resistance (direct current)
44 Ohm/km
Impedance (31,25 kHz)
100 Ohm ±20%
Attenuation (39 kHz)
3 dB/km
Capacitive asymmetry
2 nF/km
Max. propagation delay change (7.9 to 39 kHz)
1.7 µsec/km
Max. shield coverage
90%
Cable length
1900 m
T = ON
T = AUTO ON
T = OFF
T = ON
T = AUTO ON
Fig. 86 – PA segment using one connector
Fig. 87 - PA segment with a stub line

Procentec ComBricks Specifications

General

Brand	Procentec
Model	ComBricks
Category	Switch
Language	English