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Siemens 3RW51 Series Manual

Siemens 3RW51 Series Manual

Industrial controls , soft starters and solid-state switching devices
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3RW51 Soft Starter
Industrial Controls
Soft starters and solid-state
switching devices
3RW51 Soft Starter
Manual
06/2019
A5E37108631002A/RS-AB/002
Description
Safety information
Mounting and Dismantling
Wiring
Parameter assignment
Commissioning
Functions
Messages & diagnostics
Maintenance and servicing
Technical specifications
Dimension drawings
Circuit diagrams
Example circuits
Third-party software
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Summary of Contents for Siemens 3RW51 Series

  • Page 1 3RW51 Soft Starter Description Safety information Industrial Controls Mounting and Dismantling Wiring Soft starters and solid-state switching devices Parameter assignment 3RW51 Soft Starter Commissioning Manual Functions Messages & diagnostics Maintenance and servicing Technical specifications Dimension drawings Circuit diagrams Example circuits Third-party software 06/2019 A5E37108631002A/RS-AB/002...
  • Page 2 Note the following: WARNING Siemens products may only be used for the applications described in the catalog and in the relevant technical documentation. If products and components from other manufacturers are used, these must be recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensure that the products operate safely and without any problems.
  • Page 3 Siemens Industry Online Support ................... 21 1.13 Support Request ........................23 1.14 Siemens Industry Online Support app ..................23 Safety information ............................ 25 Security information ........................ 25 ESD Guidelines ........................26 Five safety rules for working in or on electrical systems ............28 Reactive power compensation ....................
  • Page 4 Table of contents 3.5.7 Installing the 3RW5 HMI Standard on a flat surface .............. 47 3.5.8 Installing the 3RW5 HMI High Feature on a flat surface ............49 3.5.9 Cut out the hinged cover for 3RW5 HMI ................50 3.5.10 Replacing the hinged cover of the 3RW51 soft starter ............
  • Page 5 Table of contents Soft Torque ..........................91 Additional parameters ......................93 3RW5 HMI Standard ....................... 94 7.8.1 Design of the 3RW5 HMI Standard ..................94 7.8.2 3RW5 HMI Standard menu ..................... 95 7.8.3 Setting station address via 3RW5 HMI Standard ..............99 3RW5 HMI High Feature ......................
  • Page 6 Table of contents Technical specifications ......................... 143 10.1 Technical data in Siemens Industry Online Support ............143 Dimension drawings ..........................145 11.1 CAx data ..........................145 Circuit diagrams ............................. 147 12.1 CAx data ..........................147 Example circuits ............................. 149 Main circuit connection ......................149 A.1.1...
  • Page 7 Description Target group The manual is intended for everyone involved in the following tasks: ● Planning and configuring systems ● Installation ● Commissioning ● Service and maintenance Requirements for use of 3RW5 soft starters Basic knowledge of the following areas: ●...
  • Page 8 Description 1.2 Device design Device design ① Main circuit connection (mains supply and external bypass) ② Slot for 3RW5 HMI Standard or 3RW5 HMI High Feature (accessories) ③ Interface for 3RW5 HMI Standard or 3RW5 HMI High Feature (accessories) ④ Setting elements for parameter assignment ⑤...
  • Page 9 Description 1.3 Operating principle Operating principle Soft starters are used to start three-phase induction motors with reduced torque and reduced starting current. The 3RW51 soft starter starts the motor as soon as the switch-on command is issued (t During the ramp-up time (t to t ), the current is conducted via power semiconductors which starts up the motor smoothly.
  • Page 10 Description 1.3 Operating principle Functions ● Soft starting with parameterizable starting voltage and starting ramp time ● Soft stopping with parameterizable ramp-down time ● Parameterizable current limiting function ● Soft torque for smooth ramp-up and ramp-down (avoiding torque peaks by means of torque limitation) ●...
  • Page 11 Description 1.4 Interaction interfaces Interaction interfaces ① SIRIUS 3RW51 soft starter ② LED display on 3RW51 soft starter ③ Fieldbus (via optional communication module) ④ PC or programming device with configuring software of controller (e.g. STEP 7) ⑤ Programmable logic controller (e.g. SIMATIC S7-1500) ⑥...
  • Page 12 Description 1.5 Operating modes and master control function Operating modes and master control function Operating modes The following modes are available (in ascending order of priority): Mode Control Control of the 3RW5 soft starter Priority source Automatic Fieldbus PROFINET and PROFIBUS: PLC controls Lowest Modbus: Modbus client (e.g.
  • Page 13 Description 1.6 Device versions Device versions Size 1 / 2 Size 3 Size 4 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 14 Description 1.7 Areas of application / load types Areas of application / load types Conveyor belts Pumps Compressors Agitators Fans Saws Starting of a motor causes a rapid change in the load current. The resulting torque impulses place severe stresses on the mechanical parts of a machine or plant. Moreover, voltage dips can occur in the power supply system which can have a negative influence on other devices: ●...
  • Page 15 The STS suggests suitable soft starters for the respective application based on the entered motor and load data and application requirements as well as providing information on the parameterization. The Simulation Tool for Soft Starters (STS) can be downloaded from the Internet (https://support.industry.siemens.com/cs/ww/en/view/101494917). 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 16 Description 1.9 Structure of the article number Structure of the article number Digit of the article number 1st-4th 10th 11th 12th SIRIUS 3RW soft starter 3RW5 Size and rated operational current I of the soft starter Connection system Applies to sizes 1 / 2 •...
  • Page 17 Description 1.10 Accessories 1.10 Accessories 1.10.1 Communication modules The following 3RW5 communication modules are available for integration of the 3RW51 soft starters in fieldbus systems: ① 3RW5 PROFIBUS communication module ② 3RW5 PROFINET Standard communication module ③ 3RW5 Modbus RTU communication module Integration into the automation software The 3RW51 soft starter can be integrated in an automation software, for example, STEP 7 (TIA Portal) via GSD / GSDML.
  • Page 18 Description 1.10 Accessories 1.10.2 3RW5 HMI 3RW5 HMI Standard The 3RW5 HMI Standard can be used to monitor and control (motor ON / OFF) the 3RW51 soft starter and acknowledge faults. The 3RW5 HMI Standard can either be installed in the 3RW51 soft starter or in the control cabinet door (using accessories) or mounted on a wall (using accessories).
  • Page 19 Description 1.10 Accessories 3RW5 HMI High Feature (HF) The 3RW5 HMI High Feature can be used to parameterize, monitor and control (ON / OFF) the 3RW51 soft starter. The 3RW5 HMI High Feature can either be installed in the 3RW51 soft starter or in the control cabinet door (using accessories) or mounted on a wall (using accessories).
  • Page 20 (https://support.industry.siemens.com/cs/ww/en/view/19289930) ● EMC guide (http://www.siemens.com/emc-guideline) ● IEC guide (http://www.siemens.com/iec60204) Interesting links ● FAQs for soft starters 3RW5 (https://support.industry.siemens.com/cs/ww/en/ps/16212/faq) ● Manuals in Siemens Industry Online Support (https://support.industry.siemens.com/cs/ww/en/ps/man) ● FAQs for soft starters 3RW5 (https://support.industry.siemens.com/cs/ww/en/ps/16212/faq) ● Downloads for soft starters 3RW5 (https://support.industry.siemens.com/cs/ww/en/ps/16212/dl) ●...
  • Page 21 Siemens Industry Online Support Information and service At Siemens Industry Online Support you can obtain up-to-date information from our global support database quickly and simply. To accompany our products and systems, we offer a wealth of information and services that provide support in every phase of the lifecycle of your machine or plant –...
  • Page 22 Description 1.12 Siemens Industry Online Support mySupport With "mySupport", your personal work area, you get the very best out of your Industry Online Support experience. Everything enables you to find the right information - every time. The following functions are now available: ●...
  • Page 23 1.14 Siemens Industry Online Support app You can use the Siemens Industry Online Support app to access all the device-specific information available on the Siemens Industry Online Support portal for a particular article number, including operating instructions, manuals, datasheets, FAQs etc.
  • Page 24 Description 1.14 Siemens Industry Online Support app 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 25 Siemens’ products and solutions undergo continuous development to make them more secure. Siemens strongly recommends that product updates are applied as soon as they are available and that the latest product versions are used. Use of product versions that are no longer supported, and failure to apply the latest updates may increase customer’s exposure...
  • Page 26 Safety information 2.2 ESD Guidelines ESD Guidelines All electronic devices are equipped with large-scale integrated ICs or components. Due to their design, these electronic elements are highly sensitive to overvoltage, and thus to any electrostatic discharge. The acronym ESD has become the established designation for such electrostatic sensitive components / devices.
  • Page 27 Safety information 2.2 ESD Guidelines Electrostatic charging Anyone who is not connected to the electrical potential of their surroundings can be electrostatically charged. The diagram below shows the maximum electrostatic voltage which may build up on a person coming into contact with the materials specified in the diagram. These values correspond to IEC 801-2 specifications.
  • Page 28 Safety information 2.3 Five safety rules for working in or on electrical systems Five safety rules for working in or on electrical systems A set of rules, which are summarized as the "five safety rules", are defined for working in or on electrical systems as a preventative measure against electrical accidents: 1.
  • Page 29 Safety information 2.4 Reactive power compensation Reactive power compensation Capacitors for improving the power factor (reactive power compensation) Capacitors may not be connected to the output terminals of the 3RW51 soft starter. Connecting capacitors to the output terminals will damage the 3RW51 soft starter. Active filters, e.g.
  • Page 30 Safety information 2.4 Reactive power compensation 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 31 Mounting and Dismantling Installing the 3RW51 soft starter Procedure 1. Mount the 3RW51 soft starter on a level surface (Page 34). 2. Ensure that the permissible temperature range and the necessary distances are complied with. Support Request (Page 23) 3. Optionally mount the fan cover (Page 32). 4.
  • Page 32 Mounting and Dismantling 3.2 Mounting the fan cover Mounting the fan cover Requirements ● Screwdriver T20 ● Fan cover that matches the size Size Article number of the Article number of the Number of required fan soft starter fan cover covers Size 1 / 2 3RW511.-..
  • Page 33 Mounting and Dismantling 3.2 Mounting the fan cover Procedure NOTICE Material damage due to mechanical load. Avoid a mechanical load on the fan hub when mounting the fan cover. ① ② ● Place the fan cover on the fan and fasten the fan cover –...
  • Page 34 Mounting and Dismantling 3.3 Mounting the 3RW51 soft starter on a level surface Mounting the 3RW51 soft starter on a level surface Requirements ● Note the mounting positions, minimum clearances and ambient conditions stated on the data sheet. ● Level surface, e.g. sufficiently strong mounting plate ●...
  • Page 35 Mounting and Dismantling 3.3 Mounting the 3RW51 soft starter on a level surface Procedure CAUTION Heavy device. Device can cause injury if it is dropped. Always ask a second person to help you transport, install and dismantle a heavy device. Use suitable lifting equipment and wear personnel protective equipment.
  • Page 36 Mounting and Dismantling 3.4 Mounting the external bypass contactor Mounting the external bypass contactor Requirements ● External bypass contactor - Based on rated current of the soft starter ● Note the mounting positions, minimum clearances and ambient conditions stated on the data sheet ●...
  • Page 37 Mounting and Dismantling 3.5 Installing / mounting / removing 3RW5 HMI Procedure NOTICE Material damage caused by electrostatic charge. ESD devices can be destroyed by voltages well below the threshold of human perception. These static voltages develop when you touch a component or electrical connection of a device without having discharged your own body.
  • Page 38 Mounting and Dismantling 3.5 Installing / mounting / removing 3RW5 HMI 3.5.2 Removing 3RW5 HMI Standard Procedure ① ● Pull the 3RW5 HMI Standard far enough out of the 3RW51 soft starter to gain access to the HMI connecting cable. ②...
  • Page 39 Mounting and Dismantling 3.5 Installing / mounting / removing 3RW5 HMI 3.5.3 Installing the 3RW5 HMI High Feature in the 3RW51 soft starter Requirements ● 3RW5 HMI High feature (accessory) ● HMI connecting cable 0.1 m (accessory) ● Hinged cover for 3RW51 with cutout for 3RW5 HMI High Feature (accessory) or Cut out the hinged cover for 3RW5 HMI (Page 50) Procedure NOTICE...
  • Page 40 Mounting and Dismantling 3.5 Installing / mounting / removing 3RW5 HMI 3.5.4 Removing 3RW5 HMI High Feature Requirements ● Cross-tip screwdriver Procedure NOTICE Damage to the sealing surfaces. Make sure that the sealing surfaces are not damaged by the screwdriver. ●...
  • Page 41 Mounting and Dismantling 3.5 Installing / mounting / removing 3RW5 HMI 3.5.5 Installing the 3RW5 HMI Standard in the control cabinet door Requirements ● Note the mounting positions, minimum clearances and ambient conditions stated on the data sheet ● 3RW5 HMI Standard (accessories) ●...
  • Page 42 Mounting and Dismantling 3.5 Installing / mounting / removing 3RW5 HMI Procedure with door mounting kit IP65 ● Remove the protective film from the adhesive tape on the seal and secure the seal on the ① rear side of the 3RW5 HMI Standard Ensure that the seal does not overlap.
  • Page 43 Mounting and Dismantling 3.5 Installing / mounting / removing 3RW5 HMI Procedure for installing the cable ● Connect the connecting cable of the 3RW5 HMI Standard to the 3RW51 soft starter. Pay attention to the coding of the plug and socket. ①...
  • Page 44 Mounting and Dismantling 3.5 Installing / mounting / removing 3RW5 HMI 3.5.6 Installing the 3RW5 HMI High Feature in the control cabinet door Requirements ● Note the mounting positions, minimum clearances and ambient conditions stated on the data sheet ● 3RW5 HMI High Feature (accessories) ●...
  • Page 45 Mounting and Dismantling 3.5 Installing / mounting / removing 3RW5 HMI Procedure with door mounting kit IP65 ● Remove the protective film from the adhesive tape on the seal and secure the seal on the ① rear side of the 3RW5 HMI High Feature Ensure that the seal does not overlap.
  • Page 46 Mounting and Dismantling 3.5 Installing / mounting / removing 3RW5 HMI ③ ● Continue to screw the screws into the fixing brackets until they protrude approx. 8 mm ④ at the front. Fasten the fixing brackets onto the 3RW5 HMI High Feature ⑤...
  • Page 47 Mounting and Dismantling 3.5 Installing / mounting / removing 3RW5 HMI 3.5.7 Installing the 3RW5 HMI Standard on a flat surface Requirements ● Note the mounting positions, minimum clearances and ambient conditions stated on the data sheet ● 3RW5 HMI Standard (accessories) ●...
  • Page 48 Mounting and Dismantling 3.5 Installing / mounting / removing 3RW5 HMI Note Locking switch. Make sure that the locking switch on the rear of the 3RW5 HMI Standard is in the required position. For more information, see Chapter 3RW5 HMI Standard (Page 18). ●...
  • Page 49 Mounting and Dismantling 3.5 Installing / mounting / removing 3RW5 HMI 3.5.8 Installing the 3RW5 HMI High Feature on a flat surface Requirements ● Note the mounting positions, minimum clearances and ambient conditions stated on the data sheet ● 3RW5 HMI High Feature (accessories) ●...
  • Page 50 Mounting and Dismantling 3.5 Installing / mounting / removing 3RW5 HMI 3.5.9 Cut out the hinged cover for 3RW5 HMI Requirements Note Accessories Hinged covers with correctly sized cutout can be ordered as an accessory. ● Detached hinged cover without cutout Replacing the hinged cover of the 3RW51 soft starter (Page 51) ●...
  • Page 51 Mounting and Dismantling 3.5 Installing / mounting / removing 3RW5 HMI 3.5.10 Replacing the hinged cover of the 3RW51 soft starter Requirements Optional accessories: ● Hinged cover with cutout for 3RW5 HMI Standard ● Hinged cover with cutout for 3RW5 HMI High Feature Procedure NOTICE Damage to the HMI display.
  • Page 52 Mounting and Dismantling 3.5 Installing / mounting / removing 3RW5 HMI 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 53 Wiring Connections 4.1.1 Overview of all connections ① Main circuit connection network 1 / L1, 3 / L2, 5 / L3 ② Main circuit connection external bypass contactor 7 / B1, 8 / B2, 9 / B3 ③ Main circuit connection load motor 2 / T1, 4 / T2, 6 / T3 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 54 Wiring 4.1 Connections ④ A1 / A2: Supply voltage for control terminals ⑤ Input IN to switch the drive on and off ⑥ Output 13, 14: To signal the operating state ON or RUN (parameterizable) ⑦ Output 23, 24: To signal the operating state BYPASSED ⑧...
  • Page 55 Wiring 4.1 Connections 4.1.2 State diagrams of the inputs and outputs ① Supply voltage for control terminals A1 and A2 ② Main circuit connection network 1 / L1, 3 / L2, 5 / L3 ③ Input IN to switch the motor on and off ④...
  • Page 56 Wiring 4.2 Connecting the 3RW51 soft starter ⑥ Output 13, 14: Parameterized to signal operating state RUN (Page 77) ⑦ Output 23, 24: To signal operating state BYPASSED ⑧ Output 95, 96 (NC) to signal faults ⑨ Output 95, 98 (NO) to signal faults Connecting the 3RW51 soft starter Requirements ●...
  • Page 57 Wiring 4.3 Connecting 3RW51 soft starter to main circuit connection (line side / motor side) Connecting 3RW51 soft starter to main circuit connection (line side / motor side) Requirements ● Observe the conductor cross-sections and tightening torques in the data sheet or on the front beneath the hinged cover ●...
  • Page 58 Wiring 4.3 Connecting 3RW51 soft starter to main circuit connection (line side / motor side) ① ● Connect connection 1 / L1, 3 / L2, 5 / L3 to the supply system and tighten the ② screws ① ② ● Repeat steps for connection 2 / T1, 4 / T2, 6 / T3 with the motor.
  • Page 59 Wiring 4.4 Connecting the external bypass contactor to the 3RW51 soft starter Connecting the external bypass contactor to the 3RW51 soft starter Requirements ● Observe the conductor cross-sections and tightening torques in the data sheet or on the front beneath the hinged cover. ●...
  • Page 60 Wiring 4.4 Connecting the external bypass contactor to the 3RW51 soft starter Procedure for bar connection - sizes 3 and 4 Pay attention to the representation on the packaging of the connection set. ● Connect connection 7 / B1, 8 / B2, 9 / B3 to the supply network. ●...
  • Page 61 Wiring 4.5 Replacing the terminals on size 1/2 devices Replacing the terminals on size 1/2 devices Requirements ● Pay attention to the required tools indicated on the front beneath the hinged cover. Dismantling procedure DANGER Hazardous voltage. Will cause death or serious injury. Turn off and lock out all power supplying this device before working on this device.
  • Page 62 Wiring 4.5 Replacing the terminals on size 1/2 devices Assembly procedure ① ● Plug the new terminal into the main circuit connections and tighten the screws with a ② tightening torque of 4.5 - 6 Nm 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 63 Wiring 4.6 Connecting the control terminals (screw terminals) Connecting the control terminals (screw terminals) Requirements ● Observe the conductor cross-sections and tightening torques in the data sheet or on the front beneath the hinged cover. ● Pay attention to the required tools indicated on the front beneath the hinged cover. Procedure DANGER Hazardous voltage.
  • Page 64 Wiring 4.7 Disconnecting the control terminals from the screw-type terminals Disconnecting the control terminals from the screw-type terminals Requirements Pay attention to the required tools indicated on the front beneath the hinged cover. Procedure DANGER Hazardous voltage. Will cause death or serious injury. Turn off and lock out all power supplying this device before working on this device.
  • Page 65 Wiring 4.8 Replacing the control terminals Replacing the control terminals Requirements ● Remove the cover over the control cable duct. (Page 68) ● Control terminal as spare part (screw terminal: 3RW5980-1TR00) Dismantling procedure DANGER Hazardous voltage. Will cause death or serious injury. Turn off and lock out all power supplying this device before working on this device.
  • Page 66 Wiring 4.8 Replacing the control terminals Assembly procedure ● Place the control terminal onto the intended connection until the terminal engages. 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 67 Wiring 4.9 Installing the cover for the control cable duct (optional accessory) Installing the cover for the control cable duct (optional accessory) Requirements ● 1-2 cable ties ● Cover for control cable channel (accessory part: 3RW5950-0GD20) Procedure ● Lay the control cables in the control cable duct and fix the control cables in place with cable ties.
  • Page 68 Wiring 4.10 Removing the cover of the control cable duct (optional accessory) 4.10 Removing the cover of the control cable duct (optional accessory) Procedure ① ● Press the cover of the control cable channel at top and bottom from the front and ②...
  • Page 69 Parameter assignment Setting elements on the 3RW51 soft starter ① CLASS setting for motor overload protection ② Rated operational current I of the motor ③ Current limiting factor as a multiple of the set rated operational current I of the motor ④...
  • Page 70 Parameter assignment 5.1 Setting elements on the 3RW51 soft starter ⑧ Scale of rated operational current I of the motor ⑨ RESET / TEST key Acknowledges faults • Performs the user test • Parameterization of ON / RUN relay output •...
  • Page 71 Parameter assignment 5.2 Overview of parameters Overview of parameters Parameters Symbol Setting range Factory setting Trip class for motor 10A, 10E, 20E, OFF overload protection Rated operational current I 1 ... 16 of the motor Current limiting value as a 4 x I 1.3 ...
  • Page 72 Parameter assignment 5.3 Suggested settings Suggested settings Application Starting voltage Ramp-up time [s] Current limiting Ramp-down time function Conveyor belt 7 × I (full) Roller conveyor 7 × I (full) Compressor 4 × I Not relevant (without pressure) Small fan 4 ×...
  • Page 73 Parameter assignment 5.4 Parameterizing the 3RW51 soft starter Parameterizing the 3RW51 soft starter Requirements ● The 3RW51 soft starter is installed and connected. ● The rated control voltage and rated operational voltage are applied. ● Suggested settings (Page 72). Note Tips for parameterizing the 3RW51 soft starter Entering the motor and load data in the STS software (Page 21) will simulate the application and a suitable soft starter will be suggested.
  • Page 74 Parameter assignment 5.5 Setting RESET MODE and Soft Torque Setting RESET MODE and Soft Torque RESET MODE and Soft Torque With the MODE key, set the functions RESET MODE and Soft Torque at the same time. Procedure WARNING Automatic restart Can cause death or serious injury.
  • Page 75 Parameter assignment 5.5 Setting RESET MODE and Soft Torque RESET MODE Note Effects of RESET MODE The setting of the RESET MODE will only affect acknowledgment response of the motor overload protection. You will find more information in Chapter Faults and remedial measures (Page 123) with the comment "Depends on parameter RESET MODE".
  • Page 76 Parameter assignment 5.6 RESET MODES RESET MODES Note Effects of RESET MODE. Setting of the RESET MODE will only affect acknowledgment response of the motor overload protection. You will find more information in Chapter Faults and remedial actions of the 3RW51 soft starter (Page 123) with the comment "Depends on parameter RESET MODE".
  • Page 77 Parameter assignment 5.7 Parameterizing output 13 / 14 (Output signal ON or RUN) Parameterizing output 13 / 14 (Output signal ON or RUN) Application One of these two states is output at output 13 / 14: ● ON ● RUN State diagrams of the inputs and outputs (Page 55).
  • Page 78 Parameter assignment 5.8 Analog output Note If you do not press any key at all for more than 10 seconds in programming mode, the device automatically terminates programming mode and reverts to normal operation. Alternatively, output 13 / 14 may also be set in the "Parameters > Soft Starter > ON / RUN relay output"...
  • Page 79 Commissioning Commissioning the 3RW51 soft starter Procedure 1. Install the 3RW51 soft starter. (Page 31) 2. Connect up the 3RW51 soft starter. (Page 56) 3. Parameterize the 3RW51 soft starter according to the application with the setting suggestions. (Page 73) If necessary, optimize the setting suggestions step by step.
  • Page 80 Commissioning 6.2 Sealing the 3RW51 soft starter Sealing the 3RW51 soft starter Requirements ● Seal, sealing wire and a suitable sealing tool. Procedure ● Push the wire through the openings provided. Result By sealing the hinged cover, you protect the operator controls of the 3RW51 soft starter from unauthorized access.
  • Page 81 Commissioning 6.3 First commissioning of the 3RW5 HMI High Feature First commissioning of the 3RW5 HMI High Feature Requirements ● Control supply voltage is connected for the first time or the factory settings have been restored on the 3RW5 HMI High Feature. Procedure ●...
  • Page 82 Commissioning 6.3 First commissioning of the 3RW5 HMI High Feature 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 83 Functions Soft starting Operating principle A voltage ramp is used to implement soft starting. The 3RW51 soft starter increases the motor voltage from a parameterizable starting voltage to the line voltage within a definable ramp-up time. ① Voltage ramp with short ramp-up time t1 ②...
  • Page 84 Functions 7.1 Soft starting ① Torque with direct-on-line starting without 3RW51 soft starter ② Torque with short ramp-up time ③ Torque with long ramp-up time ④ Torque of the load ⑤ Acceleration torque = Difference between activation torque and load torque ①...
  • Page 85 Functions 7.1 Soft starting Parameters Parameter Description Starting voltage The starting voltage determines the starting torque of the motor. A lower starting voltage results in a lower switch-on torque and a lower starting current. Set the starting voltage to a value that ensures that the motor starts up immediately and smoothly once the start command reaches the 3RW51 soft starter.
  • Page 86 Functions 7.2 Current limiting function Current limiting function Operating principle Activate the current limiting function if you want to ensure that a specific current value is not exceeded during motor starting. The motor is always started up with the voltage ramp. Before the current exceeds the parameterized current limit value x I , the voltage ramp function is aborted and the current limitation function starts.
  • Page 87 Functions 7.2 Current limiting function Parameters Parameter Description Current limiting value In order to ensure that the drive can reach its rated speed, the minimum current limiting value that you select must be high enough to generate sufficient torque in the motor. A typical value is three to four times the rated operational current (I As soon as the current limiting value is reached, the motor is started with this value until it has reached its rated operating speed.
  • Page 88 Functions 7.3 Soft stopping Soft stopping Operating principle A voltage ramp is used to implement soft stopping. With the ramp-based stopping function, the motor voltage is decreased along a linear, negative voltage ramp..t Ramp-down time Line voltage Parameters Parameter Description Ramp-down time...
  • Page 89 Functions 7.4 Motor protection Motor protection 7.4.1 Electronic motor overload protection The 3RW51 soft starter has an integrated motor protection, which is available even when the soft starter is bypassed with the external contactor. Operating principle The approximate temperature of the motor is calculated using the measured motor currents and the parameter settings "Rated operational current I "...
  • Page 90 Functions 7.5 Intrinsic device protection Intrinsic device protection Operating principle The integrated intrinsic device protection protects the power semiconductors against impermissible overload. A message is generated on the 3RW51 soft starter if the warning threshold is exceeded. If the fault threshold is exceeded, the 3RW51 soft starter will switch off automatically.
  • Page 91 Functions 7.6 Soft Torque Soft Torque Principle of operation of Soft Torque during starting The Soft Torque function reduces the drive acceleration rate shortly before the motor reaches its rated speed. This produces an almost linear speed curve. This helps to ensure smooth movement of a conveyor belt, for example, and so prevent fragile goods on the belt from tipping over.
  • Page 92 Functions 7.6 Soft Torque Rated motor speed ① Motor speed without Soft Torque ② Motor speed with Soft Torque Principle of operation of Soft Torque during stopping The Soft Torque function enables the motor to coast down smoothly at an almost constant rate of deceleration.
  • Page 93 Functions 7.7 Additional parameters Additional parameters Operating principle The soft starter has additional parameters. Requirements ● Access protection to HMI module High Feature is not active or has been reset. ● You are in menu "Parameters > Soft Starter > Additional parameters". Parameters Parameters Description...
  • Page 94 Functions 7.8 3RW5 HMI Standard 3RW5 HMI Standard 7.8.1 Design of the 3RW5 HMI Standard ① Display ② Navigation keys ③ RESET / TEST ④ Status LED ⑤ Device LEDs ⑥ Plug-in connection for HMI connecting cable ⑦ Locking switch ⑧...
  • Page 95 Functions 7.8 3RW5 HMI Standard Navigating and setting The keys are used for navigation, for selecting and setting menu items and for executing predefined actions. Actions Jump to next menu item • Set digit • Jump to previous menu item •...
  • Page 96 Functions 7.8 3RW5 HMI Standard Operating state Display Explanation STATE The ramp-up time comes to an end and the motor is running. STATE RAMP The ramp-up time or the ramp-down time is active. STATE The motor is switched off. STATE ER O The motor is not ready to start because there is a fault.
  • Page 97 Functions 7.8 3RW5 HMI Standard Measured values Display Explanation ...A The average of the 3 phase currents is displayed in amps. I AVG ...A Current measured value phase L1 is displayed in amps. I L1 ...A Current measured value phase L2 is displayed in amps. I L2 ...A Current measured value phase L3 is displayed in amps.
  • Page 98 Functions 7.8 3RW5 HMI Standard Procedure 1. Select the menu item "ERROR". 2. Press and hold a navigation key until the entry "ER 0" appears on the display. 3. Select the desired entry (ER 0 ... 9) using the navigation key. If an entry contains an active error, the associated error number will appear above it.
  • Page 99 Functions 7.8 3RW5 HMI Standard 7.8.3 Setting station address via 3RW5 HMI Standard Requirements ● 3RW51 soft starter ● Unlocked locking switch on the 3RW5 HMI Standard ● Control priority is with the 3RW5 HMI Standard Procedure 1. Select the menu item "PBADR". The currently set station address is displayed.
  • Page 100 Functions 7.9 3RW5 HMI High Feature 3RW5 HMI High Feature 7.9.1 Design and operator controls of the 3RW5 HMI High Feature Device design ① Display ② Device LEDs (Page 118) ③ Navigation keys ④ Cable duct ⑤ Plug-in connection for HMI connecting cable ⑥...
  • Page 101 Functions 7.9 3RW5 HMI High Feature Navigating and setting The keys are used for navigation, for selecting and setting menu items and for executing predefined actions. Note Setting parameters. Please note that parameters which are set manually using the 6 setting elements cannot be parameterized via the 3RW5 HMI High Feature.
  • Page 102 Functions 7.9 3RW5 HMI High Feature Menus Symbol Menu Monitoring Diagnostics Control Parameters Overview Security Memory card (only visible if a memory card is inserted.) 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 103 Functions 7.9 3RW5 HMI High Feature 7.9.2 Main menu of the 3RW5 HMI High Feature with the 3RW51 soft starter Monitoring Menu Content Measured values Phase currents [%] • Phase currents (rms) • Motor temperature rise (%) • Remaining motor cooling time [s] •...
  • Page 104 Functions 7.9 3RW5 HMI High Feature Parameters Menu Content Soft starter Parameter display • Analog output • ON / RUN relay output • Spare part management (only visible if a control unit has been • replaced.) Communication This menu item is only displayed if a 3RW5 communication module is used. PROFINET •...
  • Page 105 Functions 7.9 3RW5 HMI High Feature Overview Menu Content Soft starter Article number • Hardware • Firmware • Tag function • Tag location • Installation date • Additional information • Manufacturer • Serial number • Communication Article number • Hardware •...
  • Page 106 Functions 7.9 3RW5 HMI High Feature Micro SD card This menu is only displayed if a micro SD card is inserted. Menu Content Uploading / downloading of communication and HMI parameters on memory card Device change Back up the configuration data on the micro SD card •...
  • Page 107 Functions 7.9 3RW5 HMI High Feature 7.9.3 Parameterizing the 3RW5 HMI High Feature Requirements ● Access protection to 3RW5 HMI High Feature is not active or has been reset ● You are in menu "Parameters > HMI". Procedure Select a parameter. The menus "Response after Logoff"...
  • Page 108 Functions 7.9 3RW5 HMI High Feature 7.9.4 Monitoring 7.9.4.1 Monitoring the measured values of the 3RW51 soft starter with the 3RW5 HMI High Feature Requirements ● You are in menu "Monitoring > Measured Values". Procedure for measured values Select a measuring value. The menus "Phase Currents [%]"...
  • Page 109 Functions 7.9 3RW5 HMI High Feature 7.9.4.2 Monitoring the process image of the 3RW51 soft starter with the 3RW5 HMI High Feature Requirements You are in menu "Monitoring > Process Image". Procedure In the process image of the inputs (PII) and outputs (PIQ), you can see which bits of the process image are active or inactive.
  • Page 110 Functions 7.9 3RW5 HMI High Feature Procedure Parameters Setting range Explanation Output signal type Via the "Output signal type" parameter you Deactivated • can define with what type of signal the 4 ... 20 mA (factory setting) • analog value is to be output. 0 ...
  • Page 111 Functions 7.9 3RW5 HMI High Feature 7.9.6 Overview Operating principle The "Overview" function displays the connected components and their device-related information. Requirements ● You are in the "Overview" menu. Procedure Select one of the following menus and click "OK" to confirm: ●...
  • Page 112 Functions 7.9 3RW5 HMI High Feature Overview Content Communication module Module Article number • (if existing) Hardware • Firmware • Manufacturer information Manufacturer • Serial number • Note I&M data Please note that it is not possible to process the displayed information of the 3RW5 HMI High Feature.
  • Page 113 Functions 7.9 3RW5 HMI High Feature 7.9.7 Defining the local access protection (PIN) Requirements ● Access protection to 3RW5 HMI High Feature is not active or has been reset ● You are in menu "Security > Local Access Protection". "Define PIN" procedure 1.
  • Page 114 Functions 7.9 3RW5 HMI High Feature Parameters Parameter Description Local access protection Define PIN PIN is set up and active. Empty (factory setting) • 4-digit PIN • Change PIN Existing PIN is changed. Delete PIN PIN is deactivated and deleted. Automatic Log Off time 0 min = deactivated (factory setting) •...
  • Page 115 Functions 7.9 3RW5 HMI High Feature 7.9.8 Micro SD card Operating principle In combination with a micro SD card, the 3RW5 HMI High Feature can perform firmware updates, exchange configuration files and service data, and store logbooks. Requirements ● Access protection to the 3RW5 HMI High Feature is not active or has been reset. ●...
  • Page 116 Functions 7.9 3RW5 HMI High Feature Parameters The "Micro SD Card" menu appears after you have inserted a micro SD card into the 3RW5 HMI High Feature. Action Description Load communication and HMI parameters The parameters of the communication and the 3RW5 to soft starter HMI High Feature are transferred from the micro SD card to the 3RW51 soft starter .
  • Page 117 Messages & diagnostics Diagnostics options The 3RW51 soft starter offers the following diagnostics options: ● LEDs on the 3RW51 soft starter ● 3RW5 HMI High Feature (accessories) ● 3RW5 HMI Standard (accessories) You will find more details in the equipment manual for the 3RW5 communication module in question.
  • Page 118 Messages & diagnostics 8.2 LED display 8.2.2 Status and error displays LED "RN" - RUN State Meaning The 3RW51 soft starter is ready for operation. Lights up green The 3RW51 soft starter is not ready, e.g. due to: Flashes System startup •...
  • Page 119 Messages & diagnostics 8.2 LED display 8.2.3 LED STATE / OVERLOAD LED ST/OL Status of the 3RW51 Motor operating state soft starter Operation The ramp-up time comes to an end and the motor is running. Lights up green Ramp-up or ramp-down Motor is ramping up or ramping down.
  • Page 120 Messages & diagnostics 8.2 LED display 8.2.4 Overview of LEDs on 3RW5 HMI Standard The display of the device LEDs of the 3RW5 HMI Standard shows the messages of the following devices: ● 3RW51 soft starter ● 3RW5 communication module (if there is one) Status LED Status LED Status of the 3RW51 soft starter...
  • Page 121 Messages & diagnostics 8.2 LED display 8.2.5 Overview of LEDs on 3RW5 HMI High Feature The display of the device LEDs on the 3RW5 HMI High Feature shows the messages of the following devices: ● 3RW5 HMI High Feature ● 3RW51 soft starter ●...
  • Page 122 Messages & diagnostics 8.3 Warnings and remedial measures Warnings and remedial measures Warning Cause Remedy Connection abort in manual Connection to a local control Check the connection • mode station (e.g. device HMI) has between the HMI and the been interrupted. device.
  • Page 123 Messages & diagnostics 8.4 Faults and remedial actions of the 3RW51 soft starter Faults and remedial actions of the 3RW51 soft starter Error Fault Cause Remedy Manual Remote Auto RESET RESET RESET Bus fault Acknowledgment via Auto RESET Switching element Check switching •...
  • Page 124 Messages & diagnostics 8.4 Faults and remedial actions of the 3RW51 soft starter Error Fault Cause Remedy Manual Remote Auto RESET RESET RESET Motor overload tripping The motor Please check the motor • • feeder has and the applications been that are being driven by overloaded the motor.
  • Page 125 Messages & diagnostics 8.4 Faults and remedial actions of the 3RW51 soft starter Error Fault Cause Remedy Manual Remote Auto RESET RESET RESET 1466 Contact 1 failed Power Check the contact blocks semiconductor for L1, L2, and L3 and 1467 Contact 2 failed defective replace any that are...
  • Page 126 Messages & diagnostics 8.5 Faults and remedial actions on the 3RW5 HMI High Feature Error Fault Cause Remedy Manual Remote Auto RESET RESET RESET 1523 Device error Irrecoverable fault Replace the device. detected following self-diagnostics (self-test, contactor contacts, switching element, etc.).
  • Page 127 Messages & diagnostics 8.6 RESET MODES RESET MODES Note Effects of RESET MODE. Setting of the RESET MODE will only affect acknowledgment response of the motor overload protection. You will find more information in Chapter Faults and remedial measures (Page 123) with the comment "Depends on parameter RESET MODE".
  • Page 128 Messages & diagnostics 8.7 Diagnostics via the 3RW5 HMI High Feature module Diagnostics via the 3RW5 HMI High Feature module 8.7.1 Diagnostics of the 3RW51 soft starter with the 3RW5 HMI High Feature Requirements You are in "Diagnosis > Soft Starter" menu. Parameters Diagnostic value Comment...
  • Page 129 Messages & diagnostics 8.7 Diagnostics via the 3RW5 HMI High Feature module Diagnostic value Comment Maximum Minimum phase current I L1 (%) Maximum pointers are based on measured pointer values and represent the highest or smallest Phase current I L2 min (%) measured value that occurred in the past.
  • Page 130 Messages & diagnostics 8.7 Diagnostics via the 3RW5 HMI High Feature module Diagnostic value Comment Self-test Initiate here the self-test functions of the (user-test) 3RW51 soft starter. For more information, see Chapter User test (Page 134). Logbook The logbook is a history memory in which events, warnings and faults are shown with a real-time stamp and stored in a list.
  • Page 131 Messages & diagnostics 8.7 Diagnostics via the 3RW5 HMI High Feature module 8.7.3 Execute HMI diagnostics with the 3RW5 HMI High Feature Requirements You are in "Diagnosis > HMI" menu. Parameters Diagnostic value Comment Diagnosis state Shows all active diagnostic messages. Self-test Test LEDs The device LEDs of the 3RW5 HMI High Feature are tested...
  • Page 132 Messages & diagnostics 8.7 Diagnostics via the 3RW5 HMI High Feature module 8.7.4 Logbooks Operating principle The logbook lists events, warnings, and faults in chronological order. Each entry is stamped with the real time. The following logbooks are used for the 3RW51 soft starter: ●...
  • Page 133 Observe the notes included in the operating instructions and manuals of the soft starter in question. Note Repair of the devices is only permissible by qualified personnel. Please contact the authorized Siemens service partner for this. 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 134 Maintenance and servicing 9.2 User test User test Requirements 3RW51 soft starter is in a fault-free condition. Procedure Depending on how long the RESET / TEST keys are held pressed, the following tests are performed in the specified sequence. Thus, if the key is held pressed for longer than 5 s, all 3 tests are performed: Operating time Explanation...
  • Page 135 Maintenance and servicing 9.2 User test LED test Display of test result pass fail "RN" Lights up green "ER" Lights up red "MT" Lights up yellow "STATE / OVERLOAD" Lights up yellow "RESET MODE" Lights up green "SOFT TORQUE" Lights up green Current detection test Display of test result pass...
  • Page 136 Maintenance and servicing 9.2 User test Motor overload protection test Display of test result pass fail "STATE / OVERLOAD" Flashes red In case of error: System LEDs (RN, ER, MT) flashing. Device fault, replace device. "ER" In case of error: System LEDs (RN, ER, MT) flashing. Device fault, replace device.
  • Page 137 ● 3RW5 HMI High Feature ● Communication modules Requirements Valid firmware update Link (https://support.industry.siemens.com/cs/ww/en/ps/16212/dl) Procedure 1. Make sure that the motor is switched off and you do not start the motor during the firmware update. A control command for starting the motor is not supported during the firmware update.
  • Page 138 Maintenance and servicing 9.4 Perform the firmware update using micro SD memory card (3RW5 HMI High feature) Perform the firmware update using micro SD memory card (3RW5 HMI High feature) Requirements ● Micro SD memory card with valid firmware file (*.upd) ●...
  • Page 139 Maintenance and servicing 9.5 Restore factory setting Restore factory setting Effects of the factory setting The following devices can be reset to the factory setting: ● 3RW51 soft starter – The parameters of the 3RW51 soft starter that were not set by means of setting elements are reset.
  • Page 140 Maintenance and servicing 9.5 Restore factory setting 9.5.1 Restoring the factory settings via 3RW5 HMI High Feature Requirements ● Access protection to 3RW5 HMI High Feature is not active or has been removed. ● You are in menu "Parameters > Factory Settings". ●...
  • Page 141 Maintenance and servicing 9.5 Restore factory setting 9.5.2 Restoring the factory settings with the reset button via 3RW5 HMI High Feature Requirements ● Free access to the Master RESET key of the 3RW5 HMI High Feature ● 3RW5 HMI High Feature is connected to 3RW51 soft starter via the HMI connecting cable.
  • Page 142 Maintenance and servicing 9.5 Restore factory setting 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 143 Technical data in Siemens Industry Online Support Technical data sheet You can also find the technical data of the product at Siemens Industry Online Support (https://support.industry.siemens.com/cs/ww/en/ps/16212/td). 1. Enter the full article number of the desired device in the "Product" field, and confirm with the Enter key.
  • Page 144 Technical specifications 10.1 Technical data in Siemens Industry Online Support 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 145 Dimension drawings 11.1 CAx data You can find the CAx data in the Siemens Industry Online Support (https://support.industry.siemens.com/cs/ww/en/ps/16212/td). 1. Enter the full article number of the desired device in the "Product" field, and confirm with the Enter key. 2. Click the "CAx data" link.
  • Page 146 Dimension drawings 11.1 CAx data 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 147 Circuit diagrams 12.1 CAx data You can find the CAx data in the Siemens Industry Online Support (https://support.industry.siemens.com/cs/ww/en/ps/16212/td). 1. Enter the full article number of the desired device in the "Product" field, and confirm with the Enter key. 2. Click the "CAx data" link.
  • Page 148 Circuit diagrams 12.1 CAx data 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 149 Example circuits Main circuit connection A.1.1 Feeder assembly, type of coordination 1 fuseless Feeder assembly, type of coordination 1 fuseless The connections of the 3RW51 soft starter are wired into the motor feeder between the motor starter protector and the motor. This achieves type of coordination 1. Motor starter protector (e.g.
  • Page 150 Example circuits A.1 Main circuit connection A.1.2 Feeder assembly, type of coordination 1 with fuses If a main or line contactor is used, it should not be connected between the soft starter and the motor. The soft starter could otherwise indicate a "Missing load voltage" fault in case of a start command and delayed connection of the contactor.
  • Page 151 In order to achieve type of coordination 2, you must provide additional protection for all power semiconductors against short circuits by means of special semiconductor fuses (e.g. SIEMENS SITOR). A short circuit can occur, for instance, as a result of a defect in the motor windings or in the motor's power supply cable.
  • Page 152 Example circuits A.1 Main circuit connection A.1.4 Inside-delta circuit The inside-delta circuit requires a motor with windings that can be connected in a delta circuit where a line voltage prevails. If the 3RW51 soft starter is operated in an inside-delta circuit, the motor power output of the individual devices is increased by a factor of root 3.
  • Page 153 Example circuits A.1 Main circuit connection Motor starter protector aR partial-range fuse for protection of semiconductors (e.g. SITOR 3NE3/4 or 3NC) gR full-range fuse for protection of semiconductors (e.g. SITOR 3NE1) 3RW51 soft starter External bypass contactor Motor contactor for electrical decoupling Motor Protective conductor 3RW51 Soft Starter...
  • Page 154 Example circuits A.1 Main circuit connection Motor rotation contrary to the line phase direction 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 155 Example circuits A.1 Main circuit connection Motor starter protector aR partial-range fuse for protection of semiconductors (e.g. SITOR 3NE3/4 or 3NC) gR full-range fuse for protection of semiconductors (e.g. SITOR 3NE1) External bypass contactor Motor contactor for electrical decoupling 3RW51 soft starter Motor Protective conductor 3RW51 Soft Starter...
  • Page 156 Example circuits A.2 Control circuit connection Control circuit connection A.2.1 Control by pushbutton Requirements ● ON / RUN relay output was parameterized to ON 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 157 Example circuits A.2 Control circuit connection Wiring of control circuit for control by pushbutton Fuse Pushbutton: Start motor Pushbutton: Reset > 4 s 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 158 Example circuits A.2 Control circuit connection Pushbutton: Stop motor Motor starter protector 3RW51 soft starter External bypass contactor Motor Protective conductor Alternatively, the motor feeder can be assembled as a fuseless or fused version with type of coordination 1 or 2. A.2.2 Control by switch WARNING...
  • Page 159 Example circuits A.2 Control circuit connection Wiring of control circuit for control by switch Fuse Switch Switch: Reset > 4 s 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 160 Example circuits A.2 Control circuit connection Motor starter protector Soft starter External bypass contactor Motor Indicator light Indicator light Protective conductor A.2.3 Switching with the control supply voltage Requirements ● Owing to the intrinsic protection, an interval of at least 5 minutes must be allowed to elapse prior to restarting if the device is switched on and off in normal operation by means of the control voltage.
  • Page 161 Example circuits A.2 Control circuit connection Wiring of control circuit on switching with the control supply voltage Fuse Switch: Reset > 4 s OFF Motor starter protector 3RW51 soft starter External bypass contactor Motor 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 162 Example circuits A.2 Control circuit connection Indicator light Indicator light Protective conductor A.2.4 Control by PLC Requirements WARNING Automatic restart. Can cause death or serious injury. If a starting command is pending, a restart will be triggered automatically after the reset. This particularly applies if the motor protection has tripped.
  • Page 163 Example circuits A.2 Control circuit connection Wiring of control circuit for control by PLC 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 164 Example circuits A.2 Control circuit connection F1, F2 Fuse Intermediate relay control for Reset > 4 s Intermediate relay for IN Motor starter protector 3RW51 soft starter External bypass contactor Intermediate relay for error Intermediate relay for ON / RUN Indicator light for error Indicator light for ON / RUN Motor...
  • Page 165 Example circuits A.2 Control circuit connection A.2.5 Actuation of a line contactor Requirements ● ON / RUN relay output was parameterized to RUN. WARNING Automatic restart. Can cause death or serious injury. If a starting command is pending, a restart will be triggered automatically after the reset. This particularly applies if the motor protection has tripped.
  • Page 166 Example circuits A.2 Control circuit connection Wiring of control circuit for controlling a line contactor Fuse Switch Pushbutton: Reset > 4 s Motor starter protector 3RW51 soft starter External bypass contactor Line contactor Motor Indicator light Protective conductor 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 167 Example circuits A.2 Control circuit connection A.2.6 Wiring for remote RESET Procedure Result You can reset a pending fault message by operating the reset button for > 4 s. A.2.7 Connecting the evaluation unit to the analog output Requirements ● 3RW51 soft starter with analog output ●...
  • Page 168 Example circuits A.2 Control circuit connection A.2.8 Serial starting of 3RW51 soft starter with 3 parameter sets 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 169 Example circuits A.2 Control circuit connection 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 170 Example circuits A.3 Special applications Special applications A.3.1 Controlling a motor with a magnetic parking brake Requirements ● ON / RUN relay output was parameterized to RUN. WARNING Automatic restart. Can cause death or serious injury. If a starting command is pending, a restart will be triggered automatically after the reset. This particularly applies if the motor protection has tripped.
  • Page 171 Example circuits A.3 Special applications Wiring Fuse Switch Pushbutton: Reset > 4 s Motor starter protector 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 172 Example circuits A.3 Special applications 3RW51 soft starter External bypass contactor Indicator light, fault Motor Protective conductor A.3.2 EMERGENCY STOP shutdown to SIL 1 or PL c with a 3SK1 safety relay The 3RW51 soft starter has no effect or influence on the safety function of the application. For this reason, it is neither positively nor negatively considered in the safety application, and also does not have to be included in the calculation for proof according to the standards.
  • Page 173 Example circuits A.3 Special applications Requirements If the soft stop function is set (ramp-down time setting element set to > 0 s) and the emergency stop circuit is tripped, a "Missing load voltage, phase failure / missing load" fault may be indicated on the soft starter. In this case, the soft starter must be reset according to the selected RESET MODE.
  • Page 174 Example circuits A.3 Special applications Wiring of the 3RW51 soft starter Fuse Switch: Start / stop Push button: Reset > 4 s Motor starter protector 3RW51 soft starter 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 175 Example circuits A.3 Special applications Contactor External bypass contactor Indicator light Indicator light Motor Protective conductor A.3.2.1 Wiring of the 3SK1 safety relay SIL 1 with line contactor Fuse Line contactor Contactor Start button Emergency stop 3SK1111 safety relay 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 176 Example circuits A.3 Special applications A.3.2.2 Wiring of the 3SK1 safety relay SIL 1 without line contactor Fuse Contactor Start button Emergency stop 3SK1111 safety relay 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 177 Example circuits A.3 Special applications A.3.3 EMERGENCY STOP shutdown to SIL 3 or PL e with a 3SK1 safety relay The 3RW51 soft starter has no effect or influence on the safety function of the application. For this reason, it is neither positively nor negatively considered in the safety application, and also does not have to be included in the calculation for proof according to the standards.
  • Page 178 Example circuits A.3 Special applications Requirements If the soft stop function is set (ramp-down time setting element set to > 0 s) and the emergency stop circuit is tripped, a "Missing load voltage, phase failure / missing load" fault may be indicated on the soft starter. In this case, the soft starter must be reset according to the selected RESET MODE.
  • Page 179 Example circuits A.3 Special applications Wiring of the 3RW51 soft starter Fuse Switch: Start / stop Switch: Reset > 4 s Motor starter protector 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 180 Example circuits A.3 Special applications Soft starter Contactor Contactor External bypass contactor Indicator light: Fault Indicator light: Emergency stop Motor Protective conductor A.3.3.1 Wiring of the 3SK1 safety relay SIL 3 with line contactor Fuse Fuse Line contactor Contactor Contactor Start button Emergency stop 3SK1111 safety relay...
  • Page 181 Example circuits A.3 Special applications A.3.3.2 Wiring of the 3SK1 safety relay SIL 3 with line contactor Fuse Fuse Contactor Contactor Start button Emergency stop 3SK1111 safety relay 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 182 Example circuits A.3 Special applications A.3.4 Contactor for emergency start Requirements ● Soft starting is not possible. WARNING Automatic restart. Can cause death or serious injury. If a starting command is pending, a restart will be triggered automatically after the reset. This particularly applies if the motor protection has tripped.
  • Page 183 Example circuits A.3 Special applications Wiring Fuse Switch Push button: Reset > 4 s 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 184 Example circuits A.3 Special applications Soft starter selector button Start / stop (direct-on-line starting) Motor starter protector Soft starter Direct-on-line starting contactor External bypass contactor Indicator light, fault Indicator light Motor Protective conductor 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 185 Product or any OSS components contained in it if they are modified or used in any manner not specified by SIEMENS. The license conditions listed below may contain disclaimers that apply between you and the respective licensor.
  • Page 186 Third-party software B.1 Information about third-party software Open Source Software and/or other third-party software contained in this Product If you like to receive a copy of the source code, please contact SIEMENS at the following address: Siemens AG Digital Factory Division...
  • Page 187 Third-party software B.1 Information about third-party software Copyrights: Copyright © 2014-2017 Texas Instruments Incorporated Copyright © 2015-2017 Texas Instruments Incorporated Copyright © 2013-2017 Texas Instruments Incorporated Copyright © 2012-2017 Texas Instruments Incorporated Copyright © 2011-2017 Texas Instruments Incorporated Copyright © 2010-2017 Texas Instruments Incorporated Copyright ©...
  • Page 188 Third-party software B.1 Information about third-party software 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 189 Glossary Device master file This file is required to be able to configure a device as a DP standard slave in the HW Config of a Siemens or external system. GSDML Device master file This file is required to be able to configure a device as a DN device in the HW Config of a Siemens or external system.
  • Page 190 Glossary 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...
  • Page 191 Index 3D model, 22 Product data sheet, 145, 147 3RW5 HMI High Feature Overview, 111 Repairs, 133 CAx data, 22, 145, 147 Safety rules, 28 Dimension drawings, 22 Duty type, 12 Test Current measurement, 134 EPLAN macros, 22 Five safety rules for electricians, 28 Interaction interfaces, 11 LED test, 134 Main menu...
  • Page 192 Index 3RW51 Soft Starter Manual, 06/2019, A5E37108631002A/RS-AB/002...