Safety systems - General information
4.3 Basic terminology
3SK1 safety relays
Manual, 04/2013, A5E02526190021A/RS-AA/01
39
Note
In the case of 3SK1..2 (devices with solid-state outputs) 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.
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
Q2
4
4
0
A1
Qx Qy
Q1
Figure 4-7 PL e / Cat. 4 in accordance with ISO 13849-1 or SILCL 3 in accordance with IEC 62061
WARNING
For 3SK1..2 (devices with solid-state outputs): In continuous operation, the key safety
values apply in the case of a function test interval (state change of the outputs) ≤ 1 year.
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