Siemens SIMATIC PC RI25/45 Technical Description page 47

MPI/DP Port
The MPI/DP socket connector has the following pinout:
Figure 2-12 MPI/DP socket connector
Pinout
Pin No.
1
2
3
4
5
6
7
8
9
Shield
SIMATIC PC RI25/45, Technical Description
C79000-G7076-C808-01
1
6
9
5
Abbreviation
NC Pin 1 is unassigned
NC Pin 2 is unassigned
LTG_B Data line B
RTSAS RTSAS control signal for receive
data current. Signal '1' is active
when the directly linked
programmable controller transmits
data.
M5EXT M5EXT Ground (GND) of 5 V
supply. The current load of an
external consumer connected
between P5EXT and M5EXT must
not exceed a maximum of 90 mA.
P5 EXT P5EXT supply (+5 V) of 5V
supply. The current load of an
external consumer connected
between P5EXT and M5EXT must
not exceed a maximum of 90 mA.
NC Pin 7 is unassigned
LTG_A Data line A
RTS_PG RTS output signal. The signal is '1'
when your IPC starts transmitting.
On connector shell
Motherboard
Description
–
–
Input/
Output
Input
Output
–
Input/
Output
Output
Input/
Output
2-25