ABB AC500 PLC - 2.6.4.11 PROFIBUS Connection Details

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.
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Fig. 241: 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.
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Fig. 242: 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.
2.6.4.11 PROFIBUS Connection Details
9-pin D-sub connector, male
Parameter Value
Fastening torque 0.4 Nm
Pin Signal Description
1 Shield Shielding, protective earth
2 not used -
3 RxD/TxD-P Reception / transmission line,
positive
4 CBTR-P Control signal for repeater,
positive (optional)
5 DGND Reference potential for data
lines and +5 V
6 VP +5 V, supply voltage for bus
terminating resistors
7 not used -
Straight-through
cable
Attachment
Plug for the Bus
Cable
Assignment
System Assembly, Construction and Connection
AC500 (Standard) > Connection and Wiring
2019/04/17 3ADR010121, 13, en_US 1291