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5.6
MPI/DP interface
Pin assignment
The MPI/DP socket has the following pin assignment:
Signal description
Pin no.
Short name
1
NC
2
NC
3
LTG_B
4
RTS_AS
5
M5V
6
P5V
7
NC
8
LTG_A
9
RTS_PG
Shield
-
SCALANCE M804PB
Operating Instructions, 11/2023, C79000-G8976-C496-04
Meaning
not connected
not connected
Data line B
RTSAS, control signal for received data stream. The
signal is '1' active when the directly connected S7
automation system sends.
Reference potential of the MPI/DP interface for the
signals RTS_AS and RTS_PG
+5 V (only for bus termination)
not connected
Data line A
RTS output signal of the SCALANCE M804PB.
The signal is '1' active when the SCALANCE
M804PB sends.
The signal is not included in the 0.3 m MPI cable.
on connector housing
For more on this, refer to the information on the
grounding concept in the system manual "SIMATIC
NET PROFIBUS Network Manual
support.industry.siemens.com/cs/ww/en/view/
35222591)".
Input/output
-
-
Input and output
Input
Output
Output
-
Input and output
Output
-
(https://
Connecting up
5.6 MPI/DP interface
51
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