Siemens SIMATIC TOP connect Manual page 31

Assignment of the cable connections to the address bytes of the 32-channel digital modules and com‐
pact CPUs for the X2 interface
③
④
For the Compact CPU 312C for the connection X1:
Relates to the following order number:
● 6ES7921-3AK20-0AA0
5
6
8
1
5
5
10
5
①
②
③
⑤
⑥
⑦
⑧
⑨
⑩
⑪
The connectors for the supply voltage are only available in the screw-type version.
System cabling for S7-300
Manual, 09/2018, 70327045899
IB (x+2)
IB (x+3)
5
7
+
-
+
-
9
2
5
5
3
11
+
-
+
-
5
Cable connections
Cable connections
Cable connections
Openings for strain relief
Opening for connecting cable
Opening for screwdriver
①
Supply connections for
①
Supply connections for
③
Supply connections for
③
Supply connections for
QB (x+2)
QB (x+3)
②
and
②
and
Connecting
4.3 Connecting components
QB x
QB (x+1)
31