Siemens S7-300 User Manual page 7

Ethernet interface RJ45 socket signal array
Pin Signal name
1 Tx+
2 Tx-
3 Rx+
4 Not used
5 Not used
6 Rx-
7 Not used
8 Not used
Default Button: Restore the default setted parameters. Insert the penpoint into the hole to press the
button for about 1 second, the internal Flash memory parameters will restore to factory default
parameters: IP = 192.168.0.250, Username = admin, Password = admin. When you forget the IP
address,user name or password, you can restore to the factory default parameters,and then reset
the parameters.
DP/MPI interface: DP/MPI interface is the DB9M-pin plug which meets the Siemens PROFIBUS
and MPI interface technical specifications, the signal array match S7-300/400PLC interface, and
has a 0.5 meter cable, you just simply plug the DB9M of ETH Adapter CN directly into the
S7-300/400PLC MPI or PROFIBUS interface outlet.
PIN Signal
name
1 NC
2 M24V
3 LTG_B
4 RTS_AS
5 M5V
6 P5V
7 P24V
8 LTG_A
9 RTS_PG
Shell Shielding Shield ground (chassis ground)
Positive phase
differential signal line
negative phase
differential signal line
Positive phase
differential signal line
Negative phase Ethernet data receiving
differential signal line
DP/MPI plug（DB9M pin）signal array
No use
24VDC power negative
RS485 signal positive
RTSAS control signal ,when it has data receiving,the
signal is "1".
RS485 signal ground and
5VDC power ground
No use
24VDC power positive
RS485 signal negative
The adapter RTS output signal,when the adapter is
sending signal,the signal is "1",this signal is not
connected to MPI extension cable.
Function
Ethernet data
Ethernet data
Ethernet data
Description
- 7 -
Type
sending Output
sending Output
receiving Input
-
-
Input
-
-
Input/Output
-
Input
Input/Output
Input
Input
-
Input
Input/Output
Output