Siemens SIMATIC PC 670 Equipment Manual page 148

Hardware Information
MPI/DP interface
The MPI/DP port on the computing unit is assigned as follows:
Figure 7-7
Pin Short Name
No.
1 -
2 -
3 LTG_B
4 RTS_AS
5 M5EXT
6 P5 EXT
7 -
8 LTG_A
9 RTS_PG
Shield
7-16
1
6
9
5
PROFIBUS/MPI Socket Connector
Meaning
Not assigned
Not assigned
Signal lead B of MPI module
RTSAS, control signal for
received data stream. The signal
is '1' active when the directly
connected AS is sending.
M5EXT return line (GND) of the 5
V power supply. The current load
caused by an external user
connected between P5EXT and
M5EXT must not exceed 90 mA.
P5EXT supply (+5 V) of 5 V
supply. The current load caused
by an external user connected
between P5EXT and M5EXT
must not exceed 90 mA.
Not assigned
Signal lead A of MPI module
RTS output signal of the MPI
module. The signal is '1' when
the PG is sending.
On connector casing
Input/Output
-
-
Input/Output
Input
Output
Output
-
Input/Output
Output
Panel PC 670 Computing Unit, Equipment Manual
Release 04/02