Siemens RS-485 Wartungshandbuch Seite 125

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Cables for PROFIBUS RS485 networks
5.8 FC trailing cable
PROFIBUS Network Manual
System Manual, Edition 04/2009, C79000-G8976-C124-03
125
Use
Due to its additional outer PE jacket, this cable is suitable for underground cabling (campus
cabling).
5.8 FC trailing cable
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Figure 5-7 Structure of the trailing cable
Trailing cable 6XV1 830-3EH10
The trailing cable 6XV1 8303EH10 corresponds to the specification IEC 61158-2 /
EN 61158-2, cable type A, with stranded copper cores (approximately AWG 24 19/36) with
the exception of the higher d.c.loop resistance.
This difference means a reduced segment length; refer to the tables in Section "
Network
configuration (Page
41)".
In contrast to the standard bus cable, the cores of the trailing cable are of stranded copper.
In conjunction with the special combination of braid shield, foil shield, and the jacket material
of polyurethane, the cable is extremely flexible while retaining highly constant electrical
characteristics.
If you connect to screw terminals, the stranded cores must be fitted with wireend ferrules
(0.25 mm
2
complying with DIN 46228).
The structure of the cable allows the use of the FastConnect (FC) stripping tool for fast
stripping of the outer jacket, see Section "
Installation instructions for SIMATIC NET
PROFIBUS FAST CONNECT (Page
138)".
6ES7 972-0BA30-0XA0 bus connectors cannot be connected.
Properties
The characteristics of the trailing cable differ from those of the standard bus cable as follows:
Extremely good resistance to abrasion
Resistance to mineral oils and fats
Extremely good resistance to UV radiation
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