Siemens’ SIRIUS 3SK series safety relays are flexible, consistent, cost-effective, and user-friendly and help simplify the planning, commissioning and expansion of today’s modern industrial plants.
Allied Electronics & Automation supplies Siemens’ SIRIUS 3SK safety relays, which deliver flexible, consistent, cost-effective and user-friendly solutions for a comprehensive range of autonomous safety applications, as well as simplify the planning, commissioning and expansion of today’s modern industrial plants.
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Siemens’ SIRIUS 3SK safety relays have a compact, modular design with replaceable terminals for enhanced plant availability, yellow terminal covers that clearly identify the devices as safety components and sensor cables up to 2,000m long. They are designed for quick implementation and, without any programming, enable the fail-safe monitoring of mechanical and electronic sensor safety functions, sensor leads and shutdown circuit actuators, as well as their own functionality, and execute safety-related disconnections when dangers arise. SIRIUS 3SK safety relays can be used as both standalone and integrated solutions and are certified to the internationally recognized IEC 62061 and ISO 13849-1 standards, as well as compliant with the industry’s highest safety requirements, SIL 3 and PL e. The series also supports extensive parameterization, enabling universal employment and outstanding system design flexibility with a lean portfolio of compact evaluation units that reduces device variance and eases device selection and inventory management. Ideal applications for the SIRIUS 3SK series safety relays include emergency stop functionality and protective door monitoring up to SIL 3 and PL e, light arrays, laser scanners, presses and punches.
SIRIUS 3SK series safety relays are available in 3SK1 and 3SK2 versions to meet a vast range of application requirements. SIRIUS 3SK1 safety relays are optimized for quick and easy implementation in simple autonomous safety applications that require detect, evaluate and react functionality and are not connected to a safety-related bus system. They are used to evaluate the sensors and the safety-related shutdown of hazards, as well as to monitor the sensors, actuators and safety-oriented functions of the safety relay. SIRIUS 3SK2 safety relays are optimized for more complex autonomous safety applications that require additional functionality, such as independent shutdown functions or the integration of higher-level control systems for diagnostics via fieldbus protocols like PROFIBUS and PROFINET. Both versions feature relay outputs that allow different voltages to be switched through their floating contacts and support currents up to 5A at 230VAC or 24VDC in addition to wear-free semiconductor outputs that are insensitive to dirt and vibration, exhibit good electrical endurance and are suitable for operation in frequently switching applications.
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Siemens’ SIRIUS 3SK1 Standard safety relays are characterized by their compact design, simple operation, relay and semiconductor outputs, wired connections, cost effectiveness and output expansions, which provide additional fail-safe, potential-free relay contacts for controlling actuators. They also feature DIP switches for parameterization, a wide voltage range and a special power supply unit designed for devices rated for 24VDC operation.
Siemens’ SIRIUS 3SK1 Advanced safety relays are characterized by their time-delayed outputs, input expansions that negate the need for individual basic devices to be interconnected if more than one sensor is required and output expansions that provide additional fail-safe, potential-free relay contacts for controlling actuators, as well as their compatibility with device connectors and their universal application possibilities. They also feature DIP switches for parameterization, a wide voltage range and an optional power supply unit designed for devices rated for 24VDC operation.
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