Configuring
4.11 Planning subnets
S7-300, CPU 31xC and CPU 31x: Installation
Operating Instructions, Edition 08/2004, A5E00105492-05
4-37
PROFIBUS cables
For PROFIBUS DP or MPI networking we offer you the following bus cables for diverse fields
of application:
Table 4-21 Available bus cables
Bus cable Order number
PROFIBUS cable 6XV1 830-0AH10
PROFIBUS cable, halogen-free 6XV1 830-0CH10
PROFIBUS underground cable 6XV1 830-3AH10
PROFIBUS trailing cable 6XV1 830-3BH10
PROFIBUS cable with PUR sheath for
environments subject to chemical and
mechanical stress
6XV1 830-0DH10
PROFIBUS cable with PE sheath for the food and
beverages industry
6XV1 830-0BH10
PROFIBUS cable for festooning 6XV1 830-3CH10
Properties of PROFIBUS cables
The PROFIBUS cable is a 2-wire, shielded twisted-pair cable with copper conductors. It is
used for hardwired transmission in accordance with US Standard EIA RS485.
The table below lists the characteristics of these bus cables.
Table 4-22 Properties of PROFIBUS cables
Properties Values
Wave impedance approx. 135 Ω to 160 Ω (f = 3 MHz to 20 MHz)
Loop resistance ≤ 115 Ω/km
Effective capacitance 30 nF/km
Attenuation 0.9 dB/100 m (f = 200 kHz)
Permitted conductor cross-sections 0.3 mm
2
to 0.5 mm
2
Permitted cable diameter 8 mm ± 0.5 mm
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