Siemens SIRIUS 3RW55 Equipment Manual page 8

Table of contents
A.2 Control circuit connection ................................................................................................ 299
A.2.1 Control by PLC ................................................................................................................. 299
A.2.2 Control by switch ............................................................................................................. 300
A.2.3 Actuation of a line contactor ............................................................................................ 302
A.2.4 Connecting the temperature sensor ................................................................................. 303
A.2.5 Connecting the evaluation unit to the analog output ........................................................ 304
A.3 Special applications ......................................................................................................... 305
A.3.1 3RW55 and 3RW55 Failsafe soft starters in Ex operation ................................................... 305
A.3.1.1 Type of motor connection "Standard" (inline) in Ex operation ............................................ 305
A.3.1.2 Type of motor connection "inside delta" in Ex operation.................................................... 307
A.3.2 3RW55 soft starter in standard (inline) circuit and stopping function DC braking with one
braking contactor ............................................................................................................ 311
A.3.3 3RW55 soft starter in standard (inline) circuit and stopping function DC braking with 2
braking contactors ........................................................................................................... 313
A.3.4 3RW55 soft starter in standard (inline) circuit with soft starting, soft stopping and the
additional function "Creep speed"..................................................................................... 315
A.3.5 Control via fieldbus with switchover to manual local operation ......................................... 317
A.3.6 Pump cleaning function ................................................................................................... 318
A.3.6.1 Pump cleaning function with creep speed ........................................................................ 318
A.3.6.2 Pump cleaning function with reversing contactor ............................................................. 320
A.3.7 Reversing duty ................................................................................................................. 322
A.3.8 3RW55 soft starter for serial starting with 3 parameter sets .............................................. 323
A.3.9 Soft starter for pole-changing motor with separate windings and 2 parameter sets ........... 328
A.3.10 3RW55 soft starter with direct-on-line starting (DOL) as emergency start .......................... 330
A.3.11 Starting a Dahlander motor .............................................................................................. 331
A.3.12 External bypass ................................................................................................................ 334
A.3.13 EMERGENCY STOP shutdown to SIL 1 or PL c with a 3SK1 safety relay without the 3RW55
Failsafe soft starter .......................................................................................................... 335
A.3.14 EMERGENCY STOP shutdown up to SIL 3 or PL e with a 3SK1 safety relay without the
3RW55 Failsafe soft starter............................................................................................... 339
A.4 3RW55 Failsafe soft starter............................................................................................... 343
A.4.1 EMERGENCY STOP shutdown to SIL 1 STO with a 3RW55 Failsafe soft starter..................... 345
A.4.2 EMERGENCY STOP shutdown to SIL 3 STO with a 3RW55 Failsafe soft starter without
coupling of the digital input DI to the failsafe digital input F-DI ......................................... 347
A.4.3 EMERGENCY STOP shutdown to SIL 3 STO with a 3RW55 Failsafe soft starter with coupling
of the digital input DI to the failsafe digital input F-DI ....................................................... 352
A.4.4 EMERGENCY STOP shutdown to SIL 3 STO with a 3RW55 Failsafe soft starter in
conjunction with bus communication and a safety control................................................ 356
Glossary ............................................................................................................................................. 359
Index .................................................................................................................................................. 361
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SIRIUS 3RW55 and 3RW55 Failsafe Soft Starters
Equipment Manual, 02/2022, A5E35630887002A/RS-AF/006