Danfoss VLT FC Series Operating Manual
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Danfoss VLT FC Series Operating Manual

Safe torque off
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Operating Guide
Safe Torque Off
VLT® Frequency Converters
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Summary of Contents for Danfoss VLT FC Series

  • Page 1 Operating Guide Safe Torque Off VLT® Frequency Converters vlt-drives.danfoss.com...

  • Page 3: Table Of Contents

    Emergency Stop of Drive with STO Using Safety Relay - Category 3, PL d, SIL2 Emergency Stop of Drive with STO, Safety Relay, and Output Contactor - Category 4, PL e, SIL3 Emergency Stop of Multiple Drives - Category 3, PL d, SIL2 Danfoss A/S © 2021.03 AQ313340186453en-00101/130R0544 | 3...
  • Page 4 Safe Torque Off Operating Guide Contents STO Technical Data Notices Regarding Technical Data European Directives Safety Standards Safety Function Safety Performance Appendix Abbreviations Conventions 4 | Danfoss A/S © 2021.03 AQ313340186453en-00101/130R0544...

  • Page 5: Introduction

    1.1 Purpose of this Operating Guide This Operating Guide provides information for use of Danfoss VLT® FC Series drives in functional safety applications. The manual includes information about functional safety standards, Danfoss VLT® FC Series Safe Torque Off (STO) function, the related installa- tion and commissioning, and service and maintenance for STO.

  • Page 6: Applied Standards And Compliance

    IEC/EN 60204-1: 2016 Stop category 0 - uncontrolled stop. • IEC/EN 61508: 2010 SIL2. • IEC/EN 61800-5-2: 2016. • IEC/EN 62601: 2015 SIL CL2. • EN ISO 13849-1: 2015 Category 3 PL d. 6 | Danfoss A/S © 2021.03 AQ313340186453en-00101 / 130R0544...

  • Page 7: Safety

    Install additional measures (for example, a safety holding brake) if external forces influence the motor axis (for example suspended loads). 2.5 Safety Precautions See the Safety chapter in the relevant operating guides for general safety precautions. Danfoss A/S © 2021.03 AQ313340186453en-00101 / 130R0544 | 7...
  • Page 8 The unintended restart prevention is implemented by other parts of the STO installation. A presence in the dangerous zone can be physically excluded when STO is not activated. In particular, observe paragraph 6.3.3.2.5 of ISO 12100:2010. 8 | Danfoss A/S © 2021.03 AQ313340186453en-00101 / 130R0544...
  • Page 9 When designing the machine application, timing and distance must be considered for a coast to stop (Stop Category 0 or STO). For more information regarding stop categories, refer to EN 60204-1. Danfoss A/S © 2021.03 AQ313340186453en-00101 / 130R0544 | 9...

  • Page 10: Installation

    The operator or electrical installer is responsible for proper grounding and compliance with all applicable national and local safe- ty regulations. 2.5 Safety Precautions and the Operating Guide of the relevant drive. Also, always observe the instructions provided by the motor manufacturer. 10 | Danfoss A/S © 2021.03 AQ313340186453en-00101 / 130R0544...

  • Page 11: Installing Sto

    Illustration 2: Jumper between Terminals 13 (24 V) and 37 (FCD 302) For example, connect an external safety monitoring relay via an NO safety function to terminal 37 (STO) and either terminal 12 or 13 (24 V DC). Danfoss A/S © 2021.03 AQ313340186453en-00101 / 130R0544 | 11...

  • Page 12: Installation In Combination With Vlt® Ptc Thermistor Card Mcb 112

    Safe Stop can be set to value [7] PTC 1 & Relay W or [8] PTC 1 & Relay A/W. Refer to VLT® PTC Thermistor Card MCB 112 Operating Guide for further details. 12 | Danfoss A/S © 2021.03 AQ313340186453en-00101 / 130R0544...

  • Page 13: Commissioning

    [1] Safe Stop Alarm to value [3] Safe Stop Warning. Automatic restart means that STO is terminated and normal operation is resumed when the 24 V DC is applied to terminal 37. No reset signal is required. Danfoss A/S © 2021.03 AQ313340186453en-00101 / 130R0544 | 13...

  • Page 14: Sto Commissioning Test

    It is required for PL d or SIL2 to conduct a functional test every 12 months to detect any failure or malfunction of the STO functional- ity. For lower PL or SIL, it is a recommendation. 14 | Danfoss A/S © 2021.03 AQ313340186453en-00101 / 130R0544...

  • Page 15: Performing Functional Tests

    Reconnect 24 V DC supply to terminal 37. Verify that the motor is not started automatically and restarts only by giving a reset signal via bus, digital I/O, or [Reset] key. Danfoss A/S © 2021.03 AQ313340186453en-00101 / 130R0544 | 15...

  • Page 16: Application Examples

    MTTFd correspond- ing to PL c. Implementation in SISTEMA using Danfoss VLT library As an example, use the subsystem "VLT® AutomationDrive FC 302/FCD 302 Safe Torque Off (Terminal 37)". There is no need to edit all the parameters which are set in the library.

  • Page 17: Emergency Stop Of Drive With Sto Using Safety Relay - Category 3, Pl D, Sil2

    This setup can be used if a dual positive switching device is used. Depending on the safety relay, it is also possible to connect sever- al activation devices to 1 STO. Implementation of SISTEMA using Danfoss VLT library As an example, use the subsystem "VLT® AutomationDrive FC 302/FCD 302 Safe Torque Off (Terminal 37)". There is no need for editing all the parameters which are set in the library.

  • Page 18: Emergency Stop Of Drive With Sto, Safety Relay, And Output Contactor - Category 4, Pl E, Sil3

    • Device used for activation of STO and safety relay must be suitable for the selected category, PL or SIL. When implementing the emergency stop, pay attention to the following tips: 18 | Danfoss A/S © 2021.03 AQ313340186453en-00101 / 130R0544...

  • Page 19: Emergency Stop Of Multiple Drives - Category 3, Pl D, Sil2

    This setup can be used if a dual positive switching device is used. Implementation in SISTEMA using Danfoss VLT library As an example, use the block "VLT® AutomationDrive FC 302 (Terminal 37)". There is no need for editing all the parameters which are set in the library.
  • Page 20 This setup can be used if a dual positive switching device is used. Depending on the safety relay, it is also possible to connect sever- al activation devices to one STO. Implementation in SISTEMA using Danfoss VLT library As an example, use the subsystem "VLT® AutomationDrive FC 302/FCD 302 Safe Torque Off (Terminal 37)". There is no need for editing all the parameters which are set in the library.
  • Page 21 VLT® Parallel Drive Modules: • 400 V: 250/315 kW (350/450 hp) – 800/1000 kW (1200/1350 hp) (High Overload/Normal Overload). • 690 V: 315/400 kW (350/400 hp) – 1000/1200 kW (1150/1350 hp) (High Overload/Normal Overload). Danfoss A/S © 2021.03 AQ313340186453en-00101 / 130R0544 | 21...
  • Page 22 Bulleted and dashed lists indicate listings of other information where the order of the information is not relevant. • Bolded text indicates highlighting and section headings. • Italicized text indicates the following: Cross-reference. Link. Footnote. Parameter name. 22 | Danfoss A/S © 2021.03 AQ313340186453en-00101 / 130R0544...
  • Page 23 Appendix Parameter option. Parameter group name. Alarms/warnings. • All dimensions in drawings are in metric values (imperial values in brackets). • An asterisk (*) indicates the default setting of a parameter. Danfoss A/S © 2021.03 AQ313340186453en-00101 / 130R0544 | 23...
  • Page 24 Qualified personnel..................7 EN 61800-3.....................21 Low voltage directive................ 21 EN 50178....................21 Restart prevention................13, 14 IEC 62061..................21,21,22 IEC 60204-1..................21,21 IEC 61508-1....................21 Symbols......................7 Safety device....................12 Safety-guard switch..................12 Safety-related sensor.................. 12 Signal........................ 12 Type code......................5 24 | Danfoss A/S © 2021.03 AQ313340186453en-00101/130R0544...
  • Page 25 Safe Torque Off Operating Guide Index Danfoss A/S © 2021.03 AQ313340186453en-00101/130R0544 | 25...
  • Page 26 Danfoss can accept no responsibility for possible errors in catalogs, brochures, and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed. All trademarks in this material are property of the respective companies.

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