Siemens SIMATIC HMI IPC677C Operating Instructions Manual page 200

Detailed descriptions
16.1 Motherboard
All ports are designed as high current USB (500 mA), you can only use a maximum of 2
simultaneously as high current, however.
NOTICE
No USB devices can be connected which feed back voltage to the Box PC.
PROFIBUS/MPI interface X4
PROFIBUS/MPI interface
Pin no.
1
2
3
4
5
6
7
8
9
Shield
Optional product variant
1
200
1
Short description Meaning
– Unassigned
– Unassigned
LTG_B Signal line B of MPI module
RTS_AS RTSAS, control signal for received data
stream. The signal is "1" when the directly
connected AS is sending.
M5EXT M5EXT return line (GND) of 5 V supply. The
current load of an external consumer
connected between P5EXT and M5EXT may
not exceed the 90 mA.
P5 EXT P5EXT power supply (+5 V) of the 5 V power
supply. The current load of an external
consumer connected between P5EXT and
M5EXT may not exceed the 90 mA.
– Unassigned
LTG_A Signal line A of the MPI module
RTS_PG RTS output signal of the MPI module. The
control signal is "1" when the programming
device is sending.
on connector casing
Input / Output
–
–
Input/output
Input
Output
Output
–
Input/output
Output
SIMATIC HMI IPC677C
Operating Instructions, 04/2013, A5E02722710-04