3SK1 safety relays
Manual, 04/2013, A5E02526190021A/RS-AA/01
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3SK1 devices
5
5.1 3SK1 standard
5.1.1 General information
The safety relays of the Standard series can be configured as stand-alone devices or as an
expansion solution with conventional wiring technology.
The focus of the Standard series is on:
● Single devices for simple safety applications
● Output-side expansion by means of expansion units and external wiring
● No expansion on the input side
5.1.2 Applications
The safety relay can be used in EMERGENCY OFF/EMERGENCY STOP devices in
accordance with ISO 13850 and in safety circuits in accordance with VDE 0113-1 and/or DIN
EN 60204-1. 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.
Application examples
● 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.
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