Connecting The Safety-Related Input; Connecting Fail-Safe Digital Inputs - Siemens SINAMICS G120D Operating Instructions Manual

Appendix
A.7 Setting a non standard HTL encoder
A.6.2

Connecting the safety-related input

The following examples show the interconnection of the safety-related input accordance with
PL d to EN 13849-1 and SIL2 according to IEC61508. You can find further examples and
information in the Safety Integrated Function Manual.
A.6.3

Connecting fail-safe digital inputs

The examples comply with PL d according to EN 13849-1 and SIL2 according to IEC 61508
for the case that all components are installed within one control cabinet.
Figure A-8
You may connect emergency stop control devices in series because it is not possible for
these devices to fail and be actuated at the same time.
Figure A-9
According to IEC 62061 (SIL) and ISO 13849-1 (PL), position switches of protective doors
may also connected in series.
Exception: If several protective doors are regularly opened at the same time, it is not
possible for faults to be detected, which means that the position switches must not be
connected in series.
You can find additional connection options in the Safety Integrated Function Manual, see
Section: Manuals for your converter (Page 292).
284
Connecting a sensor, e.g. Emergency Stop mushroom push-button or limit switch
Connecting electromechanical sensors in series
Converter with control units CU240D-2
Operating Instructions, 04/2014, FW V4.7, A5E34262100B AA