Note On Connecting Digital I/O Modules - Siemens SIMATIC TOP connect Manual

Wiring SIMATIC TOP connect to the I/O modules

5.5 Note on connecting digital I/O modules

5.5 Note on connecting digital I/O modules
Introduction
This section contains information on connecting digital I/O modules to SIMATIC TOP connect
using TP3 as an example.
Note
The information provided here does not apply to the 2 A output module.
For the connection of the 2 A output module, see section "Note on connecting the 2 A output
module (Page 47)".
Using potential bridges
If you want to supply load groups with the same potential (non-isolated), use the potential
bridges. This saves you having to wire a terminal point with two wires.
The exact application is described in the respective manual of the I/O module to be wired for
the example of the front connector. You can find an overview of this documentation in the
section "Documentation guide (Page 9)". The procedure described in the front connector
documentation can also be followed for the front connector modules.
Note
The potential bridges can be wired either to the front connector module or to the terminal
module.
NOTICE
High continuous current damages components.
The current must not exceed the maximum current carrying capacity of 8 A per potential
bridge.
Make sure when you wire the potential bridges that no continuous current of over 8 A per
potential bridge can occur.
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System cabling for S7-300
Manual, 09/2018, 70327045899