Keba ServoOne Series, User Manual

Page: 16 / 86

16
Installation and connection
ServoOne User Manual SERCOS II and III
ID no.: 1108.26B.3-00 Date: 04/2020
Installation and connection
4.2.2 Installation and wiring
For SERCOS III, connection between the master and slave is made with the aid of
standard Ethernet cables with RJ45 connectors. The SERCOS III option card has two
RJ45 sockets (X36, X37), as such a ring or line structure is possible.
Ethernet patch cables or crossover cables as per the CAT5e specification are suitable as
connection cables.
Figure 4.3
Linie
Master
P1 P2
ServoOne
P1 P2
ServoOne
P1 P2
ServoOne
P1 P2
Sercos III line structure
Figure 4.4
Master
P1 P2
Ring
ServoOne
P1 P2
ServoOne
P2 P1
ServoOne
P1 P2
SERCOS III ring structure
If possible, the ring structure should always be chosen, because here the master sends
the telegrams in both directions and as such redundant communication is possible.
I.e. if there is an interruption in the ring between two slaves or between a master and
a slave; this situation is detected and, within one bus cycle, the bus switched to a line
structure with two lines; the communication is therefore not interrupted.
This redundancy is not possible with a line structure.
The individual ports can be connected between the bus users as required, i.e. the port
for the input and the port for the output are not defined.
4.2.3 Pin assignment of the RJ-45 socket
The pin assignment of the RJ-45 socket is realised as follows:
PIN Colour Cable core pair Function
1 white/orange 2
2 Orange 2 TxData -
3 white/green 3 Re
4 blue 1 Unused
5 white/blue 1 Unused
6 green 3 RecvData -
7 white/brown 4 Unused
8 brown 4 Unused
Table 4.1 Pin assignment
Figure 4.5
1 2 3 4 5 6 7 8
2
4 1
3
Pair #
RJ-45 socket