Siemens SIRIUS 3SK1

Technical data
13.2 Basic units
3SK1 safety relays
214 Manual, 04/2013, A5E02526190021A/RS-AA/01
13.2.2.3 Technical data for 3SK1121 Advanced relay time-delayed basic unit
3SK1121-.CB.1 3SK1121-.CB.2 3SK1121-.CB.4
Insulation voltage rated value V 300
Resistance against shock 10g / 11 ms
Number of sensor inputs 1-channel
or 2-channel
1
Design of the cascading yes
Type of the safety-related wiring of
the inputs
single-channel and two-channel
Product feature transverse contact-
secure
Yes
Safety Integrity Level (SIL)
• according to IEC 61508
SIL3
• for delayed release circuit
according to IEC 61508
SIL3
Performance Level (PL)
• according to ISO 13849-1
e
• for delayed release circuit
according to ISO 13849-1
e
Category according to ISO 13849-1 4
T1 value for proof test interval or
service life according to IEC 61508
a 20
Safety device type according to
IEC 61508-2
Type B