Siemens SIMATIC NET PROFIBUS Owner's Manual page 110

Passive Components for RS-485 Networks
Properties
The characteristics of the flexible cable differ from those of the standard LAN cable
as follows:
S The sheath material is free of halogens (polyurethane, PUR)
S Extremely good resistance to abrasion
S Resistant to mineral oils and grease
S Extremely good resistance to UV radiation
S Small bending radii for installation and operation
S Due to the smaller Cu cross-section, the d.c. loop resistance and the HF
attenuation are higher which means reduced segment lengths.
S The sheath material is flame resistant
Uses
The flexible cable is designed for torsion of 180
suitable for networking moving plant parts, for example robots.
Note
If you connect to screw terminals, the stranded cores must be fitted with wire-end
ferrules (0.25 mm
materials with permanently stable contact properties, for example copper with a
tin-plated surface (not aluminum).
The bus connector 6ES7 972-0BA30-0XA0 cannot be connected to the stranded
cores.
4-12
2
complying with DIN 46228). Use only wire-end ferrules made of
o
and is therefore particularly
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000