Siemens SIRIUS 3SK1

Safety systems - General information
4.3 Basic terminology
3SK1 safety relays
38 Manual, 04/2013, A5E02526190021A/RS-AA/01
Actuator wiring up to PL c / Cat. 2 in accordance with ISO 13849-1 or SILCL 1 in accordance with
IEC 62061
13
23
14 24
Q1
A1
Qx
Q1
4
0
Figure 4-5 PL c / Cat. 2 in accordance with ISO 13849-1 or SILCL 1 in accordance with IEC 62061
Actuator wiring up to PL e / Cat. 4 in accordance with ISO 13849-1 or SILCL 3 in accordance with
IEC 62061
13
23
14 24
Q1 Q2
4
4
0
Figure 4-6 PL e / Cat. 4 in accordance with ISO 13849-1 or SILCL 3 in accordance with IEC 62061
WARNING
PL e / Cat. 4 in accordance with ISO 13849-1 or SILCL 3 in accordance with IEC 62061
can only be achieved with 3SK1111-…and 3SK1121-… and cross-circuit-proof/short-circuit
to P-proof laying of the control cables from the relay output (e.g. 14) to the control
relays/contactors (Q1 and Q2) (e.g. as a separately sheathed cable or in its own cable
duct).