SIRIUS safety relay Basic unit 3SK2 Series 10 F-DI, 2 F-DQ, 1 DQ, 24 V DC parameterizable via SIRIUS Safety ES 22.5 mm width Spring-loaded connection (push-in) up to SIL 3 (IEC 62061) up to Performance Level e (ISO 13849-1) Output extensions 3SK1, coupling relay 3RQ1 and fail-safe motor starters 3RM1 can be connected via device connectors SIRIUS 3SK2 basic unit for demanding safety applications with multiple safety functions. The 3SK2 basic units offer a wide range of inputs and outputs for demanding safety applications with multiple independent safety functions despite their small width. Powerful semiconductor outputs, as well as the expandability with additional 3SK1 output extensions and seamless integration into the main circuit with the fail-safe motor starters 3RM1 using device connectors offer flexible application options. Extensive logic functions are available to parameterize independent shutdowns of the fail-safe outputs. The SIRIUS Safety ES engineering software enables simple commissioning and offers extensive diagnostic options. Simple implementation of muting and safety door monitoring, for example, is possible using prefabricated logic modules.Devices in 22.5 mm with 10 inputs and 2 semiconductor outputs or in 45 mm with 20 inputs and 4 outputs, all available with screw or spring-loaded connection (push-in).Extensive accessories such as diagnostic displays, sealing covers, insertion tabs for wall mounting and coding pins make handling easier. Output extensions can be used using device connectors without additional wiring effort.Safety is a SIRIUS business.