Siemens SIRIUS 3SK1

5.2 3SK1 Advanced
5.2.1 General information
The safety relays of the Advanced device series comprise basic devices and input and output
expansions. The Advanced safety relays can be connected by means of a 3ZY12 device
connector.
When con󹪝guring the system, it must be ensured that input expansions are always mounted on
the left, and output expansions (3SK121 or 3RM1 Failsafe motor starter) on the right of the basic
unit. For control supply voltages of 110 ... 240 V AC/DC, the Advanced device series can be
supplied with the necessary 24 V DC voltage from the 3SK1230 power supply (which must be
positioned on the extreme left in the system).
The focus of the Advanced relay series is on:
• Single devices that can be 󹪞exibly parameterized
• Expandability using 3ZY12 device connector on both input and output side
• Basic units with time-delayed safety-related outputs
5.2.2 Applications
• EMERGENCY OFF / EMERGENCY STOP monitoring.
• Monitoring of protective doors with electromechanical position switches, solid-state
position switches, or solenoid switches.
• Monitoring of contact-free protection equipment, e.g. light arrays/light barriers, or laser
scanners.
The 3SK1 safety relays Advanced can be used in EMERGENCY OFF and EMERGENCY STOP devices
in accordance with EN 60204-1 and in safety circuits in accordance with VDE 0113-1 and/or EN
60204-1, e.g. in circuits in which controlled shutdown, STOP Category 1, is necessary.
Depending on the external circuit, it is possible to achieve SILCL 3 in accordance with IEC 62061,
SIL 3 in accordance with IEC 61508 and PL e (Cat. 4) in accordance with ISO 13849-1.
The safety relays comply with DIN EN 50156-2 (Electrical equipment for furnaces and ancillary
equipment).
You can use the 3SK1 Advanced safety relays to achieve two-hand switching applications up to
type IIIc in compliance with EN 574 / EN 13851.
5.2.3 General device features
Device properties:
• 4-way DIP switch for function setting (parameterization)
• SET/RESET button
3SK1 / 3RQ1 devices
5.2 3SK1 Advanced
SIRIUS 3SK1 Safety Relays and 3RQ1 Positively-Driven Coupling Relays
Equipment Manual, 05/2021, A5E02526190021A/RS-AE/005 67