Siemens SIRIUS 3SK1 Equipment Manual page 50

Safety systems - General information
4.3 Basic terminology
Actuator wiring up to PL e / Cat. 4 in accordance with ISO 13849-1 or SILCL 3 in accordance with
IEC 62061
Figure 4-7
Refer to the information on the function test interval in section General safety notes (Page 23).
Actuator wiring with 3RM1 up to PL e/Cat. 4 in accordance with ISO 13849-1 or SILCL 3 in accordance
with IEC 62061
Figure 4-8
Note
PL e/Cat. 4 in accordance with ISO 13849-1 or SILCL 3 in accordance with IEC 62061 can only be
achieved with cross-circuit-proof/short-circuit to P-proof laying of the control cables from the
relay output (e.g. 14) to the 3RM1 Failsafe motor starter (e.g. as a separately sheathed cable or
in its own cable duct). Thanks to the intrinsic safety of the 3RM1 Failsafe motor starter,
monitoring by the upstream 3SK1 safety relay (via feedback circuit) is not necessary here.
Note
In the case of 3SK1..2 and 3SK1120 (devices with semiconductor outputs with firmware (FW)
version V1.0.0 and product version E01) it is not possible to achieve PL d/e/Cat. 3/4 in accordance
with ISO 13849-1 or SILCL 2/3 in accordance with IEC 62061 with the wiring shown above.
50
13 23
14 24
Q1 Q2
PL e / Cat. 4 in accordance with ISO 13849-1 or SILCL 3 in accordance with IEC 62061
13
14
Q1 3RM1
PL e / Cat. 4 in accordance with ISO 13849-1 or SILCL 3 in accordance with IEC 62061
A1
Qx Qy
Q1 Q2
3RM1
Q1 3RM1
SIRIUS 3SK1 Safety Relays and 3RQ1 Positively-Driven Coupling Relays
Equipment Manual, 05/2021, A5E02526190021A/RS-AE/005