Technical data

Hardware Information
6-19
SIMATIC Panel PC 670 Computing Unit Equipment Manual
Edition 12/01
MPI/DP port
The MPI/DP port on the computing unit is assigned as follows:
Connector Pin
No.
Name Meaning Input/
Output
1 NC Pin 1 is not assigned -
2 NC Pin 2 is not assigned -
3 LTG_B Signal lead 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 AS is sending.
Input
1
6
5 M5EXT M5EXT return conductor (GND) of 5 V
supply. The current load caused by an
external user connected between
P5EXT and M5EXT must not exceed 90
mA.
Output
5
9
6 P5 EXT P5EXT supply (+5 V) of 5 V supply. The
current load caused by an external user
connected between P5EXT and M5EXT
must not exceed 90 mA.
Output
7 NC Pin 7 is not assigned -
8 LTG_A Signal lead A of MPI module Input/
Output
9 RTS_PG RTS output signal of the MPI module.
The signal is ’1’ when the PU is sending.
Output
Shield On connector casing
Ethernet RJ45 connection
Pin No. Meaning
1 TD+
2 TD–
3 RD+
4, 5 * Terminated internally
6 RD–
7, 8 * Terminated internally
LED yellow Link
LED green Activity
* Not required for data transmission