3.8 Electrical Installation
3.8.1 Cabling Requirements
•
Choose suitable media for Ethernet data
transmission. CAT5e and CAT6 cables are
recommended for industrial applications. Both
types are available as unshielded twisted pair and
shielded twisted pair.
•
Screened cables are recommended for use in
industrial environments and with frequency
converters.
•
A maximum cable length of 100 m is allowed
between the switches.
3.8.2 Cable Specifications
PROFINET cables used are based electrically on category 5 balanced LAN cables according to ISO/IEC 11801 Edition 2.0, Class
D.
Type C cables can be used in special applications (for example, the use of trailing cables and frequently moved machine
parts), even though their design and mechanical parameters can deviate from the specifications of type A and type B
cables. Still, most of the electrical parameters (for example, impedance levels) are retained.
Highly flexible copper cables generally have the finest stranded conductors and a highly resistant polyurethane outer
sheath. Various outer sheath materials are permitted to meet the various demands regarding resistance of industrial
environments and exterior/underground laying (natural and synthetic oil, grease, coolants/lubricants, chemicals, high and
low temperatures, UV radiation, and so on).
Cable type Application type A Application type B Application type C
Design Data Cable Data Cable Data Cable
Cable installation type Stationary, no movement
after installation
Flexible, occasional movement
or vibration
Special applications (for example, highly flexible,
permanent movement, vibration, or torsion)
Cable marking PROFINET type A PROFINET type B PROFINET type C
Core cross-section AWG 22/1 AWG 22/7 AWG 22/..
Outer diameter 5.5–8.0 mm Application dependent
Core diameter
1.5 ± 0.1 mm
Application dependent
Colour (outer sheath) Green RAL6018 Application dependent
Core identification (colours)
star quad 2 pair
White, yellow, blue, orange
Pair 1: white (RXD+), blue (RXD-) Pair 2: yellow (TXD+), orange (TXT-)
Number of cores 4
Cable design 2 pairs or 1 star quad
Shielding design type Aluminium foil + Cu braiding Application
Plug type RJ 45 (IP20 or IP65/67)/M12
Table 3.3 Cable Specifications for Application Types A, B and C
Relevant standard
ISO/IEC 11801 Edition 2.0, IEC 61156
(minimum Category 5)
Delay skew
≤20 ns/100 m
Transfer impedance
≤50 m Ω/m at 10 MHz
Table 3.4 Transmission Performance Requirements
Installation Installation Guide
10 Danfoss A/S © Rev. 07/2014 All rights reserved. MG90U402
33
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