ABB AC500 PLC Hardware Manual page 1291

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.
Fig. 241: Wiring of a crossover cable
Straight-through For networks with more than two subscribers, hubs or switches have to be used additionally for
cable distribution. These active devices already have the crossover functionality implemented which
allows a direct connection of the terminal devices using straight-through cables.
Fig. 242: Wiring of a straight-through cable
2.6.4.11 PROFIBUS Connection Details
Attachment 9-pin D-sub connector, male
Plug for the Bus
Cable
Parameter
Fastening torque
Assignment
Pin
1
2
3
4
5
6
7
2019/04/17
12345678
1
2
3
4
5
6
7
8
12345678
1
2
3
4
5
6
7
8
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.
Signal
Shield
not used
RxD/TxD-P
CBTR-P
DGND
VP
not used
3ADR010121, 13, en_US
System Assembly, Construction and Connection
AC500 (Standard) > Connection and Wiring
12345678
1
2
3
4
5
6
7
8
12345678
1
2
3
4
5
6
7
8
Value
0.4 Nm
Description
Shielding, protective earth
-
Reception / transmission line,
positive
Control signal for repeater,
positive (optional)
Reference potential for data
lines and +5 V
+5 V, supply voltage for bus
terminating resistors
-
1291