2-25
SIMATIC PC RI25/45, Technical Description
C79000-G7076-C808-01
The MPI/DP socket connector has the following pinout:
1
5
6
9
Figure 2-12
MPI/DP socket connector
Pin No.
Abbreviation
Description
Input/
Output
1
NC
Pin 1 is unassigned
–
2
NC
Pin 2 is unassigned
–
3
LTG_B
Data line B
Input/
Output
4
RTSAS
RTSAS control signal for receive
data current. Signal ’1’ is active
when the directly linked
programmable controller transmits
data.
Input
5
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.
Output
6
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.
7
NC
Pin 7 is unassigned
–
8
LTG_A
Data line A
Input/
Output
9
RTS_PG
RTS output signal. The signal is ’1’
when your IPC starts transmitting.
Output
Shield
On connector shell
MPI/DP Port
Pinout
Motherboard