Siemens SIMATIC TOP connect Manual page 48

Wiring SIMATIC TOP connect to the I/O modules
5.6 Note on connecting the 2 A output module
The potential supply must be at the front connector module, and a supplementary ground
connection to the terminal module is required for this purpose. To create this ground
connection, follow these steps:
1. Connect the supply voltage to each of the two potential clamps on the front connector
module using separate cables.
2. In addition to the connecting cable, connect one cable for M1 or M2 to each terminal module.
3. Connect M1 / M2 with a separate cable to the front connector module and terminal module.
The potential of M1 and M2 can be bridged.
+
Terminal module assignment for 2 A connection
Front view of 2 A terminal module
6
5
4
48
1
+
-
M2
2 4 6 8 10
1 3 5 7 9 11
3
3 2 1 0 3 2 1 0
M2 M1
4
①
Front connector module 2 A
②
Standard connecting cable between front connector module and terminal module
③
Additional connecting cable for M1 and M2
④
2 A output module
1
2
3
+
-
+
M1
2
12 14 16
13
15
3
Terminal assignment, left
Top row
⑥
Terminals 0 to 3 : CH0 to CH3
Middle row
⑤
M1 potential (all "M1" terminal
points bridged internally)
Bottom row
④
M1 potential (all "M1" terminal
points bridged internally)
Terminal assignment, right
Top row
①
Terminals 0 to 3 : CH4 to CH7
Middle row
②
M2 potential (all "M2" terminal
points bridged internally)
Bottom row
③
M2 potential (all "M2" terminal
points bridged internally)
System cabling for S7-300
Manual, 09/2018, 70327045899