Description; Use - Siemens SIRIUS 3SK1 Equipment Manual

Description

3.1

Use

SIRIUS 3SK1 safety relays are used mainly 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
safety-oriented functions of the safety relay.
Applications
Depending on the version of the device and the external connection of sensors and actuators,
applications up to 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 can be implemented.
• Monitoring the switch position of the sensors
• Monitoring of the sensor lines
• Monitoring the correct function of the safety relay
• Monitoring of the actuators
• Safety-related shutdown in case of hazards
SIRIUS 3SK1 Safety Relays and 3RQ1 Positively-Driven Coupling Relays
Equipment Manual, 05/2021, A5E02526190021A/RS-AE/005
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