T568A
T3
1
R3
2
T2
3
R1
4
T1
5
R2
6
T4
7
R4
8
Pair 3
Pair 4
Pair 1
Pair 2
T568B
T3
1
R3
2
T2
3
R1
4
T1
5
R2
6
T4
7
R4
8
Pair 2
Pair 4
Pair 1
Pair 3
Fig. 19: Pin assignment of RJ45 sockets
6.3.1.5.3 Cable types
Particular use
Crossover cables are needed only for a direct Ethernet connection without
crossover functionality. In particular for AC500 modules in product life cycle
phase "Classic".
Crossover cables are for a direct Ethernet connection of two terminal devices as the simplest
variant of a network. From transmission lines of the first station to the reception lines of the
second station.
12345678
12345678
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Fig. 20: Wiring of a crossover cable
For networks with more than two subscribers, hubs or switches have to be used additionally for
distribution. These active devices already have the crossover functionality implemented which
allows a direct connection of the terminal devices using straight-through cables.
12345678
12345678
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Fig. 21: Wiring of a straight-through cable
CAUTION!
Risk of communication faults!
When using inappropriate cables, malfunctions in communication may occur.
Only use network cables of the categories 5 (Cat 5, Cat 5e, Cat 6 or Cat 7) or
higher within PROFINET networks.
Crossover cable
Straight-through
cable
Wiring
Connection and wiring > AC500
2023/03/03
3ADR011074, 1, en_US
70