Siemens SIMATIC NET PROFIBUS - Manual (Page 111)

Passive Components for RS-485 Networks
4-13
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000
4.1.6 FC Underground Cable
Cores, solid copper
PE outer sheath
PVC inner sheath
Copper braid shield
Aluminum foil
Cellular PE insulation
Filler
Plastic foil
Figure 4-6 Structure of the Underground Cable
FC Underground Cable 6GK1 830-3FH10
The FC underground cable 6GK1 830-3FH10 meets the requirements of EN
50170, cable type A, with solid copper cores (22 gauge). The internal structure of
the cable corresponds to that of the standard LAN cable, the electrical
characteristics are identical. The cable has an additional PE outer sheath. The
outer and inner sheath are bonded together so that the FC underground cable can
be fitted with all SIMATIC NET PROFIBUS connectors after removing the outer
sheath.
After removing the outer sheath, the structure of the cable also allows use of the
FastConnect (FC) stripping tool for fast stripping of the inner cable (see Section
4.2.3).
Properties
The characteristics of the underground cable differ from those of the standard LAN
cable as follows:
S
Improved resistance to abrasion
S Improved resistance to oil and grease complying with VDE 0472, Part 803, Test
Type B
S
Resistant to UV radiation
S
Larger outer diameter and heavier
S The sheath material is flammable
S Resistant to water and steam