Detailed descriptions
16.1 Motherboard
SIMATIC Rack PC 840 V2
16-8
Operating Instructions, Edition 05/2006, A5E00248055-04
PROFIBUS/MPI interface, X400
The PROFIBUS/MPI socket has the following pinout:
PROFIBUS/MPI interface
PinNo.
Abbreviations
Meaning
Input /Output
1
–
n.c.
–
2
–
n.c.
–
3
LTG_B
Signal line B of MPI module
Input/output
4
RTS_AS
RTSAS, control signal for received data stream.
The signal is "1" active when the directly
connected PLC is sending.
Input
5
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.
Output
6
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.
Output
7
–
n.c.
–
8
LTG_A
Signal line A of MPI module
Input/output
9
RTS_PG
RTS output signal of the MPI module. The control
signal is "1" when the PG is sending.
Output
Shield
on connector casing
1
Optional product feature