Siemens SIRIUS 3SK1

3.4 Functional scope of the 3SK1 basic units
Function 3SK1 Standard 3SK1 Advanced
Type of safety-related outputs
Relays Semiconductors Relays Semiconductors
Sensors
Mechanical sensors ✓ ✓ ✓ ✓
Non-󹪞oating sensors ✓ ✓ ✓ ✓
Antivalent sensors Not possible Not possible ✓ ✓
Sensor number can be increased Not possible Cascading only ✓ ✓
Parameter
Type of start (autostart/monitored start) ✓ ✓ ✓ ✓
Sensor connection, 2 x single-channel /
1 x two-channel
By wiring ✓ ✓ ✓
Cross-circuit detection OFF / ON By wiring ✓ ✓ ✓
Start-up test OFF / ON No start-up test ✓ ✓ ✓
Monitoring of two-hand control units Not possible Not possible ✓ ✓
Safety-related outputs
Instantaneous ✓ ✓ ✓ ✓
Time-delayed None None ✓ ✓
Expandable with relay outputs By wiring By wiring ✓ ✓
Device connector Cannot be used Cannot be used ✓ ✓
Rated control supply voltage
24 V DC ✓ ✓ ✓ ✓
110 ... 240 V AC/DC ✓ Not possible ✓
1)
✓
1)
1)
Possible using 3SK1230 power supply and device connector
Description
3.4 Functional scope of the 3SK1 basic units
SIRIUS 3SK1 Safety Relays and 3RQ1 Positively-Driven Coupling Relays
Equipment Manual, 05/2021, A5E02526190021A/RS-AE/005 35