Siemens PC 670 - Manual (Page 148)

Hardware Information Release 04/02
7-16 Panel PC 670 Computing Unit, Equipment Manual
MPI/DP interface
The MPI/DP port on the computing unit is assigned as follows:
1
5
6
9
Figure 7-7 PROFIBUS/MPI Socket Connector
Pin
No. Short Name Meaning Input/Output
1 - Not assigned -
2 - Not assigned -
3 LTG_B Signal lead 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 AS 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 90 mA. Output
6 P5 EXT 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. Output
7 - Not assigned -
8 LTG_A Signal lead A of MPI module Input/Output
9 RTS_PG RTS output signal of the MPI
module. The signal is ’1’ when
the PG is sending. Output
Shield On connector casing