Siemens SIMATIC PANEL PC 877 User Manual
Page 202
Detailed descriptions
17.1 Motherboard
SIMATIC Panel PC 877
17-10
Operating instructions, Release 07/2006, A5E00877780-01
PROFIBUS/MPI interface, X400
The PROFIBUS/MPI socket has the following pinout:
PROFIBUS/MPI interface
1)
PinNo.
Abbreviation
Meaning
Input/Output
1
–
Not assigned
–
2
–
Not assigned
–
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 PLC is sending.
Input
5
M5EXT
M5EXT return line (GND) of the 5 V power
supply. The current load caused by an external
consumer 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
consumer connected between P5EXT and
M5EXT must not exceed the maximum of 90
mA.
Output
7
–
Not assigned
–
8
LTG_A
Signal line A of MPI module
Input/output
9
RTS_PG
RTS output signal of the MPI module. The
control signal is "1" when the PG is sending.
Output
Shieldin
g
on connector casing
1)
Optional product feature