Introduction - Siemens SIRIUS 3SK1 Manual

Product overview for 3SK1

3.4 Introduction

3.4 Introduction
SIRIUS 3SK1 safety relays are mainly used in autonomous safety applications that are not
connected to a safety-related bus system. Here they are used to evaluate sensors and
ensure safety-related shutdown when required. They also check and monitor the sensors,
actuators, and the safety-related functions of the safety relay.
Applications
Depending on the version of the device and the external connection of sensors and
actuators, applications up to SIL CL 3 in accordance with IEC 62061, SIL 3 in accordance
with IEC 61508 and PL e (Cat. 4) in accordance with ISO 13849-1 can be implemented.
● Monitoring the switch position of the sensors
● Monitoring of the sensor lines
● Monitoring of correct functioning of the safety relay
● Monitoring of the actuators
● Safety-related shutdown in case of hazards
24
Manual, 04/2013, A5E02526190021A/RS-AA/01
3SK1 safety relays