Communication manual 8400 motec profibus – Lenze E84DGFCP User Manual
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EDS84DMOTPBUS EN 3.0 - 11/2011
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Communication manual 8400 motec PROFIBUS
Installation
Electrical installation
If no repeater is to be used at the end of the segment, the bus must be terminated by
means of a bus terminating resistor at the last station (S). The bus termination is supplied
by this station.
An external supply of the communication unit provides for a supply of the bus termination
independent of the supply of the controller.
Number of stations
[5-4]
Number of stations
Tip!
Repeaters do not have a station address. When calculating the maximum number
of stations, they reduce the number of stations by 1 on each side of the segment.
Repeaters can be used to build up line and tree topologies. The maximum total bus
system expansion depends on ...
• the baud rate used;
• the number of repeaters used.
Note!
The bus terminator must always be supplied. Otherwise, the bus can get
unstable.
2133PFB004
M
1
2
3
S
S
S
S
S
R
R
Segment
Master (M)
Slave (S)
Repeater (R)
1
1
31
-
2
30
-
2
-
30
1
3
-
30
1