Siemens SIMATIC Rack PC 840 - Page 123

Hardware Information
7-15
SIMATIC Rack PC 840 Manual
A5E00104826-03
PROFIBUS/MPI Socket Connector *, X400
The PROFIBUS/MPI socket connector on the Rack PC has the following pinout:
1
5
6
9
Figure 7-7 PROFIBUS/MPI Socket Connector
Pin No.
Designation Description Input/Output
1 - Unassigned -
2 - Unassigned -
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 programmable controller is
sending.
Input
5 M5EXT 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 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 user connected between P5EXT and
M5EXT must not exceed the maximum of
90 mA.
Output
7 - Unassigned -
8 LTG_A Signal line A of the MPI module Input/output
9 RTS_PG RTS output signal of the MPI module. The
control signal is “1” when the programming
device is sending.
Output
Screen on connector casing
* Optional product feature