Siemens SIMATIC HMI IPC677C - Page 200

Detailed descriptions
16.1 Motherboard
SIMATIC HMI IPC677C
200 Operating Instructions, 04/2013, A5E02722710-04
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
1
Pin no. Short description Meaning 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" when the directly
connected AS is sending.
Input
5 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.
Output
6 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.
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
Shield on connector casing
1
Optional product variant