ibaBM-DPM-S Manual
Issue 2.11
23
8.1.3 Connection to the DP master and other DP slaves on the redun-
dant PROFIBUS
Figure 7: ibaBM-DPM-S connected to the redundant PROFIBUS and measuring PC as last
device on the strings
The highly available S7-400H automation system offers two parallel redundant PROFIBUS
strings. ibaBM-DPM-S is looped into the two lines by the two DP connections Bus0 (X40)
and Bus1 (X41).
In redundancy mode, the S6 switch needs to be open (OFF). The Bus0 (X40) connection
is connected to the DP string of the CPU0 and the Bus1 (X41) connection to the DP line of
the CPU1. The device can be looped at any place in the line.
If the device is looped in at the end of the line, the terminating resistor has to be switched
on (in the above example switches S4 and S5 are switched ON).
If the device is looped into the line directly after the CPUs (as shown in the next figure), the
terminating resistors need to be switched off (switches S4 and S5 to OFF).
Note
On the redundant PROFIBUS, ibaBM-DPM-S can only be used with ibaPDA-V6 and not
with ibaLogic!
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