soft start! SIRIUS soft starters are the best solution when direct-on-line or star/delta starting are not suitable for three-phase motors, because mechanical impacts in the machine or voltage dips in the power supply system can often cause problems. A full and comprehensive range of soft starters with intelligent functions offers a softer alternative for almost every application.
Go directly to the technical data of all our 3RW soft starters
Due to its exceptional functionality, the intelligent SIRIUS 3RW55 soft starter can solve even the most difficult starting and stopping tasks simply and particularly gently. Integrated smart functions (for example, pump cleaning, pump stopping, automatic parameterization, condition monitoring) help operators to run their pumps smoothly. Thanks to the SIRIUS 3RW55 Failsafe soft starters with integrated Safe Torque Off (STO) functionality, safety-related applications can also be realized.
Three-phase controlled for optimal motor start
Integrated, safety-related shutdown for SIL 1/PL c and SIL 3/PL e (with STO)
ATEX/IECEx-certified for use in hazardous areas
Engineering in the TIA Portal
A wide range of communications interfaces (PROFINET, PROFIBUS, EtherNet/IP, Modbus)
Integrated HMI (Human-Machine-Interface) with colour display
Media redundancy for reliable network availability
Integration in the process control system PCS 7 V9.0 SP2 with the 3RW5 block library
Plug and play: install the software and set the parameters!
Test the new generation of 3RW55 soft starters and simply experience how easy commissioning is. With the SIRIUS Soft Starter ES software, you can set parameters, monitor and perform diagnostics for service tasks quickly and easily. You can set the device parameters of the 3RW55 directly from your PC or laptop.
You can use the Simulation Tool for Soft Starters (STS) to select the right devices for your application – as a desktop application or optimized for your mobile device. Your selection is then automatically transferred to the Siemens Industry Mall ready for ordering via a link.
One considerable advantage of SIRIUS 3RW55 soft starters is their media redundancy thanks to the new Profinet High Feature communication module and its integrated Ethernet switch. It provides a ring topology in which communication can be maintained via a second port even if the power fails.
EtherNet/IP
SIRIUS 3RW55 soft starter communicates now addionally with EtherNet/IP. This means it is able to communicate with a wide range of process control systems.
Electrical ruggedness
All SIRIUS soft starter have a wide-range voltage versions, so that even if there is a voltage dip, the continued operation of the soft starter, the motor and the application is ensured. This level of electrical ruggedness means that operation is secured even in power supply systems with sporadic voltage dips.
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