Safety is a SIRIUS business - 3SK safety relays

With SIRIUS 3SK1 safety relays, safety functions can be simply parameterized with DIP switches. Operation of a sensor is always followed by fail-safe disabling of all outputs of these basic units.

• Seamless integration: reduces wiring effort for fail-safe SIRIUS 3RM1 motor starters
• More free space: fewer basic units and main circuit components
• Extremely compact: narrow overall width and multifunctionality

The standard basic units are characterized by easy handling and they are available with relay and solid-state outputs.

In addition to the product features of the Standard basic units, the advanced basic units also offer:

• A modular system structure: additional sensors can be connected via flexibly combinable input expansionsßen
• Reduced wiring: the simple plug-in device connector eliminates wiring errors
• Time delay: easily adjustable with the rotary coding switch

While the 3SK1 safety relays always ensure simultaneous fail-safe disabling of all outputs, the fail-safe outputs on the 3SK2 devices can be disabled individually.

• Maximum functionality with the smallest of footprints
• Slimline unit with a large number of inputs and outputs
• Selective tripping by independent outputs
• High degree of flexibility: parameters can be assigned with simple software
• Greater cost-effectiveness and modularity: 3SK1 output expansions can be added using device connectors (less wiring effort)
• Individually selectable time functions
• Integrated unit: fail-safe SIRIUS 3RM1 motor starters are seamlessly integrated using device connectors
• Connection to PROFINET and PROFIBUS for simple parameter assignment, connection to the control level, and for diagnostic purposes

Input and output expansions are available for the expansion units for 3SK safety relays:

With the 3SK1220 sensor expansion and 3SK1230 power supply input expansions, the 3SK1 advanced basic units can be made more flexible.

The 3SK1211 output expansion expands the safe outputs of a 3SK1 or 3SK2 basic unit by adding four safe floating outputs, and the 3SK1213 output expansion by adding three safe outputs with high switching capacity.

Simple parameter assignment: safety functions without requiring programming knowledge

The SIRIUS Safety ES engineering software offers extensive support to users for engineering, commissioning and documentation by means of consistency checks, online diagnostics, forcing and engineering documentation.

• With SIRIUS Safety ES, parameters are easily assigned by drag & drop with ready-made, certified blocks. These also include complex, sophisticated safety functions, such as protective doors with locking and muting.
• SIRIUS Safety ES also offers extensive support for commissioning and diagnostics. This reduces both the commissioning effort and the costs of plant downtimes.
• Once created, a parameter assignment can be replicated any number of times and transferred to other 3SK2 units.

Simply clever: simulating applications offline

With the free 3SK2 simulator, you can get to know the full range of functions of the 3SK2 with ready made applications and create and test configurations in advance. This lets you find the appropriate device for the application without any diversions. This saves substantial time and money on engineering, because no real components are required and applications can be quickly and easily adapted.

With the optional interface modules for PROFINET and PROFIBUS, the 3SK2 safety relays can be integrated on the control level for exchanging process data or diagnostics purposes. Furthermore, it is also possible to connect to the Safety ES via the respective communication network with the switching devices.

The 3SK2511 interface module is available for connection to PROFINET and the 3RK3511 for connection to PROFIBUS.