Siemens SIMATIC ET 200AL - Page 158

Wiring
3.2 Pin assignment
Interface module IM 157-1 DP (6ES7157-1AA00-0AB0)
Manual, 12/2016, A5E32100641-AD
15
3.2
Pin assignment
Note
Color coding
The sockets for ET
-Connection and the power supply of the modules are color-
coded. These
colors correspond to the colors of the offered cables.
Pin assignment of the sockets for PROFIBUS
The following table shows the pin assignment of the connectors and sockets for the
connection of PROFIBUS.
Table 3- 1 Pin assignment for PROFIBUS
Pin
Assignment
Front view of the
connector
X1 DP1
Front view of the
socket
X1 DP2
X1 DP1 connector
(feed in)
X1 DP2 Socket
(loop-through)
1
-
Supply plus P5V*
2
Data cable A
3
Data reference potential M5*
4
Data cable B
5
Functional earth FE
Shield-
ing
Functional earth FE
* The voltage may only be used for supplying the external terminating resistor. It is not permitted to
loop-through the voltage by means of a cable to the next connector.
Pin assignment of the sockets for ET-Connection
The table below shows the pin assignments of the 2 sockets for the connection of
ET-Connection.
Table 3- 2 Pin assignment for ET-Connection
Pin
Assignment
Assignment of
the wire color of
the bus line cable
for
ET-Connection
Front view of the sockets
X30 socket
(ET-Connection1)
X31 socket
(ET-Connection2)
X30
X31
1
RXP
RXP
Yellow
2
TXP
TXP
White
3
TXN
TXN
Blue
4
RXN
RXN
Orange
Shield-
ing
Functional earth FE -