Siemens PC 670 manual MPI/DP interface, Pin Short Name Meaning Input/Output

Hardware Information Release 04/02

MPI/DP interface

The MPI/DP port on the computing unit is assigned as follows:

1

6

5

9

Figure 7-7 PROFIBUS/MPI Socket Connector

Pin	Short Name	Meaning	Input/Output
No.
1	-	Not assigned	-
2	-	Not assigned	-
3	LTG_B	Signal lead B of MPI module	Input/Output
4	RTS_AS	RTSAS, control signal for	Input
		received data stream. The signal
		is ’1’ active when the directly
		connected AS is sending.
5	M5EXT	M5EXT return line (GND) of the 5	Output
		V power supply. The current load
		caused by an external user
		connected between P5EXT and
		M5EXT must not exceed 90 mA.
6	P5 EXT	P5EXT supply (+5 V) of 5 V	Output
		supply. The current load caused
		by an external user connected
		between P5EXT and M5EXT
		must not exceed 90 mA.
7	-	Not assigned	-
8	LTG_A	Signal lead A of MPI module	Input/Output
9	RTS_PG	RTS output signal of the MPI	Output
		module. The signal is ’1’ when
		the PG is sending.
Shield		On connector casing

7-16 Panel PC 670 Computing Unit, Equipment Manual