Siemens PC 677B Operations Instructions Page 187

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Detailed descriptions
17.1 Motherboard
SIMATIC Panel PC 677B
Operating Instructions, 05/2007, A5E01035609-01
187
PROFIBUS/MPI interface
1)
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
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