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Detailed descriptions
17.1 Motherboard
PROFIBUS/MPI interface, X400
The PROFIBUS/MPI socket has the following pinout:
PROFIBUS/MPI interface
PinNo.
1
2
3
4
5
6
7
8
9
Shieldin
g
Optional product feature
1)
17-10
1)
Abbreviation
Meaning
–
Not assigned
–
Not assigned
LTG_B
Signal line B of MPI module
RTS_AS
RTSAS, control signal for received data
stream. The signal is "1" active when the
directly connected PLC is sending.
M5EXT
M5EXT return line (GND) of the 5 V power
supply. The current load caused by an external
consumer connected between P5EXT and
M5EXT must not exceed the maximum of 90
mA.
P5 EXT
P5EXT power supply (+5 V) of the 5 V power
supply. The current load caused by an external
consumer connected between P5EXT and
M5EXT must not exceed the maximum of 90
mA.
–
Not assigned
LTG_A
Signal line A of MPI module
RTS_PG
RTS output signal of the MPI module. The
control signal is "1" when the PG is sending.
on connector casing
Operating instructions, Release 07/2006, A5E00877780-01
Input/Output
–
–
Input/output
Input
Output
Output
–
Input/output
Output
SIMATIC Panel PC 877
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