Omron SYSMAC CS Series Operation Manual page 59

Setting up a Network
Repeaters
Termination
Tree Topology
38
Note Repeaters are devices which connect two segments. They do not have a
device address of their own, but they do count in the total number of devices
in a segment.
A maximum of up to three repeaters between two devices in a network can be
used, i.e. a network can consist of up to 4 segments. The maximum number
of PROFIBUS devices in such a network is then 122. The figure below shows
an example of a two-segment network.
OMRON
SYSMAC CS1G
P R O G R A MMA B LE
C O N T R O LLE R
Station 1
Station 2
Termination
Station 63
The use of repeaters allows the extension of three or more Linear Bus seg-
ments into a Tree topology. In a tree topology more than three repeaters are
allowed, provided that there are no more than three repeaters between any
two devices in the network. The following figure presents an example of a net-
work with more than three segments and repeaters.
M / S
Segment 4
Max. 31 stations
M / S
M / S
R
Max. total number of stations = 126
Station 3
Station 33
Segment 1
Max. 31 stations
Segment 3
R
Max. 28 stations
R
Segment 5
Max. 30 stations
Master or slave station
Repeater
Termination
Section 2-4
Termination
Repeater
Station 31
Station 32
Segment 2
Max. 31 stations
M / S
R
M / S
R
M / S
R
Segment 6
Max. 31 stations
M / S
Termination