Siemens SINAMICS G220 Operating Instructions Manual page 190

Connecting
7.2 Interfaces for the controller
Example
The following examples correspond to Performance Level (PL) e according to EN ISO 13849-1
and Safety Integrity Level (SIL) 3 according to IEC 61508 and IEC 62061. The information relating
to PL and SIL applies in respect of the converter. The external connection of the converter is to
be assessed on the customer side.
Figure 7-26
If the relay is connected separately, the converter detects the following faults:
• Wire break and overload at terminal F-DO 0+
• Cross circuit of the F-DO terminals
The converter outputs dark pulses for cross-circuit detection. The dark pulses are staggered
for F-DO 0+ and F-DO 0-.
If there is a cross circuit between the F-DO terminals, the relays may remain switched on even
when the failsafe digital output has been switched to a safe state.
188
Connection of a relay at the sourcing output and the sinking output
Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB
SINAMICS G220 converter