General

• Approved for all safety applications because of its compliance with the highest safety requirements (SIL 3 and PL e)
• Universally usable thanks to adjustable parameters
• Usable worldwide thanks to globally valid certificates
• Compact SIRIUS design
• Device connectors with standard rail mounting for flexible connectability and expandability
• Removable terminals for greater plant availability
• Yellow terminal covers clearly identify the device as a safety component.
• Sensor cable up to 2 000 m long allows it to be used in large-scale plants.

Relay outputs

• Different voltages can be switched through the floating contacts
• Higher currents can be switched with relay contacts

Solid-state outputs

• Wear-free
• Suitable for operation in fast switching applications
• Insensitive to vibrations and dirt
• Good electrical endurance

Power outputs (3SK1213 output expansion)

• Different voltages can be switched through the floating contacts
• The power relay contacts allow currents of up to 10 A AC-15/DC-13 to be connected.
• Long mechanical and electrical endurance
• Protective separation between enabling circuits and between enabling circuits and electronics

Can be expanded by adding the 3RM1 motor starter

SIRIUS 3SK1 safety relays are ideal for combining with the SIRIUS 3RM1 motor starters.

Combinations are made by means of

• SIRIUS device connectors (3SK1 Advanced) or
• conventional wiring (3SK1 Standard and Advanced).

This makes collective shutdown very easy in assemblies. The wiring, and ultimately shutting down of the control supply voltage for the expansion components in EMERGENCY-STOP situations, is performed via the device connector. There is no further need for complex looping of the connecting cables between the safety relay and the motor starters.

The 3RM1 motor starter combines the benefits of semiconductor technology and relay technology. This combination is also known as hybrid technology.

The hybrid technology in the motor starter is characterized by the following features:

• The inrush current in the case of motorized loads is routed briefly via the semiconductors. Advantages include protection of the relay contacts and a long service life thanks to low wear.
• The uninterrupted current is conducted via relay contacts. Advantages include lower heat losses compared with the semiconductor.
• Shutdown is implemented again via the semiconductor. The contacts are only slightly exposed to arcs, and this results in a longer service life.
• Integrated overload protection

Note:

For the SIRIUS 3RM1 motor starter, see "Load Feeders and Motor Starters for Use in Switchgear Cabinets" > "SIRIUS 3RM1 Motor Starter".

3ZY1 device connector

Using 3ZY1 device connectors to combine devices reduces the time required to configure and wire the components. At the same time errors are avoided during wiring, and this considerably reduces the testing required for the fully-assembled application.

Microprocessor systems

• Flexible use thanks to many different integrated functions
• Easy parameterization using DIP switches on the front
• High functional reliability based on extensive monitoring functions
• Operated by the machine control
• Also connection of non-contact sensors (light arrays, light barriers etc.)

Configuration and stock keeping

Variable setting options by means of DIP switches, a wide voltage range and a special power supply unit reduce the cost of keeping stocks and the considerations involved in configuration where the evaluation units to be selected are concerned.

Spring-type terminal with push-in functionality

Push-in connections are a form of spring-type terminals allowing fast wiring without tools for rigid conductors or conductors equipped with end sleeves.

As with other spring-type terminals, a screwdriver (with 3.0 x 0.5 mm blade) is required to disconnect the conductor. The same tool can also be used to wire fine-stranded or stranded conductors with no end finishing.

The advantages of the push-in terminals are found, as with all spring-type terminals, in speed of assembly and disassembly and vibration-proof connection. There is no need for the checking and tightening required with screw-type connections.