Siemens SINAMICS G120 Function Manual page 67

S7-300 I/O modules
Safety outputs that switch to P potential are required for activating the safety digital inputs of
the SINAMICS G120. From the S7-300 range, the SM326 DO 10 x 24 V / 2 A PP I/O module
fulfills this requirement.
The diagrams only show how the I/O module and inverter are interconnected. Information
providing full details of how the I/O module is wired can be found in the product-specific
documentation: S7-300
(http://support.automation.siemens.com/WW/view/en/10805159/133300).
Components in the same control cabinet
A control cabinet that has been designed and wired correctly does not contain any damaged
wiring or cross circuits.
Under the assumption that the preprocessing devices switch the output used twice (involves
two contacts in series), within a control cabinet you can interconnect the I/O module SM326
and inverter through a single channel cable connection. The two terminals of the safety input
must be connected to each other at the inverter.
Figure 4-18
Safety Integrated - SINAMICS G110M, G120, G120C, G120D and SIMATIC ET 200pro FC-2
Function Manual, 04/2014, FW V4.7, A5E34261271B AA
Interconnecting the inverter and SM326 I/O module within the same control cabinet
Installing
4.3 Activation via F-DI
67