Siemens SINAMICS G120 Function Manual page 65

3RK3 Modular Safety System
You can use both the safety outputs in the MSS Basic central unit of the 3RK3 modular
safety system as well as the outputs in the EM 2/4F-DI 2F-DO expansion module to activate
the F-DIs of the inverter.
The safety relay outputs of the EM 2/4F-DI 1/2F-RO expansion module must not be used
because these only have a single-channel configuration.
The diagrams only show how the 3RK3 Modular Safety System and inverter are
interconnected. Information providing full details of how the 3RK3 Modular Safety System
are wired can be found in the product-specific documentation: SIRIUS 3RK3 Modular Safety
System (http://support.automation.siemens.com/WW/view/en/26412499/133300).
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 safety relay 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 4-16
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 Modular Safety System within the same control cabinet
Installing
4.3 Activation via F-DI
65