SIRIUS safety relay basic unit 3SK2 series 20 F-DI, 4 F-DQ, 2 DQ, 24 V DC parameterizable via SIRIUS Safety IT 45 mm wide spring-type connection (push-in) up to SILCL 3 (DIN EN 62061) up to Performance Level E (ISO 13849-1) Output extensions 3SK1 and fail-safe motor starters 3RM1 can be connected via device connector SIRIUS 3SK2 basic unit for demanding safety applications with several safety functions.The 3SK2 basic units offer a wide range of inputs and outputs for demanding safety applications with several independant safety functions. Powerful semiconductor outputs, as well as the expandability by additional 3SK1 output extensions and seamless integration in the main circuit with the fail-safe motor starters 3RM1 by means of device connectors offer flexible application possibilities. Extensive logic functions are available to parameterize independant shutdowns of the fail-safe outputs. The SIRIUS Safety engineering software ENABLES simple commissioning and offers extensive diagnost