Danfoss EZ FC 321 Operating guide

Operating Guide

Safe Torque Off

VLT® AutomationDrive EZ FC 321

vlt-drives.danfoss.com

Safe Torque Off

Operating Guide

Contents

1

Introduction 5

1.1

Purpose of this Operating Guide 5

Additional Resources 5

1.2

Functional Overview 5

1.3

1.3.1

Introduction 5

1.3.2

Products Covered and Identification 5

1.4

Applied Standards and Compliance 5

Safety 7

2

Safety Symbols 7

2.1

Qualified Personnel 7

2.2

Responsibilities of Users of Safety-related Power Drive Systems PDS(SR) 7

2.3

Protective Measures 7

2.4

Contents

Safety Precautions 7

2.5

Installation 10

3

3.1

Safety Instructions 10

3.2

Installing STO 10

4

Commissioning 11

4.1

Safety Instructions 10

4.2

Activating STO 11

4.3

Selecting Manual Restart Behavior 11

4.4

Selecting Automatic Restart 11

4.5

STO Commissioning Test 11

4.5.1

Restart Prevention for STO Application 11

4.5.2

Automatic Restart of STO Application 12

4.6

System Configuration Security 12

4.7

Service and Maintenance 12

4.7.1

Performing Functional Tests 12

5

Application Examples 13

5.1

SISTEMA Data 13

5.2

Emergency Stop of Drive with STO - Category 1, PL c, SIL1 13

5.3

Emergency Stop of Drive with STO Using Safety Relay - Category 3, PL d, SIL2 14

5.4

Emergency Stop of Drive with STO, Safety Relay, and Output Contactor - Category 4, PL e, SIL3 15

5.5

Emergency Stop of Multiple Drives - Category 3, PL d, SIL2 16

AQ355238304444en-000201/130R0955 | 3Danfoss A/S © 2021.09

Safe Torque Off

Operating Guide

6

STO Technical Data 18

Notices Regarding Technical Data 18

6.1

6.2

European Directives 18

Safety Standards 18

6.3

6.4

Safety Function 18

6.5

Safety Performance 18

Appendix 19

7

Abbreviations 19

7.1

Conventions 19

7.2

Contents

AQ355238304444en-000201/130R09554 | Danfoss A/S © 2021.09

Product

Type code

VLT® AutomationDrive EZ FC 321

X, B, or R at digit 18 of the type code.

Safe Torque Off

Operating Guide

Introduction

1 Introduction

1.1 Purpose of this Operating Guide

This Operating Guide provides information for use of Danfoss VLT® AutomationDrive EZ FC 321 drives in functional safety applica­tions. The manual includes information about functional safety standards, Danfoss VLT® AutomationDrive EZ FC 321 Safe Torque Off
(STO) function, the related installation and commissioning, and service and maintenance for STO.

VLT® is a registered trademark for Danfoss A/S.

1.2 Additional Resources

This manual is targeted at users already familiar with the VLT® drives. It is intended as a supplement to the manuals and instructions
available for download at
unit, and observe the instructions for safe installation.

www.danfoss.com. Read the instructions shipped with the drive and/or drive option before installing the

1.3 Functional Overview

1.3.1 Introduction

The Safe Torque Off (STO) function is a component in a safety control system. STO prevents the unit from generating the power
required to rotate the motor.

N O T I C E

Select and apply the components in the safety control system appropriately to achieve the required level of operational safety.

Before integrating and using STO in an installation, carry out a thorough risk analysis on the installation to determine whether the

STO functionality and safety levels are appropriate and sufficient.

The VLT® drive is available with:

•

Safe Torque Off (STO), as defined by EN IEC 61800-5-2.

•

Stop category 0, as defined in EN 60204-1.

The drive integrates the STO functionality via control terminal 37.
The VLT® drive with STO functionality is designed and approved suitable for the requirements of:

•

Category 3 in EN ISO 13849-1.

•

Performance Level "d" in EN ISO 13849-1.

•

SIL 2 in IEC 61508 and EN 61800-5-2.

•

SILCL 2 in EN 62061.

1.3.2 Products Covered and Identification

The STO function is available for the following drive types:

•

VLT® AutomationDrive EZ FC 321.

Identification

•

Confirm that the drive is configured with the STO function by checking the unit type code on the nameplate.

Table 1: Type Code Identification

1.4 Applied Standards and Compliance

Using the STO on terminal 37 requires that the user fulfills all provisions for safety, including relevant laws, regulations, and guide­lines.

The integrated STO function complies with the following standards:

•

IEC/EN 60204-1: 2016 Stop category 0 - uncontrolled stop.

•

IEC/EN 61508: 2010 SIL2.

AQ355238304444en-000201 / 130R0955 | 5Danfoss A/S © 2021.09

Safe Torque Off

Operating Guide

•

IEC/EN 61800-5-2: 2016.

•

IEC/EN 62601: 2015 SIL CL2.

•

EN ISO 13849-1: 2015 Category 3 PL d.

Introduction

AQ355238304444en-000201 / 130R09556 | Danfoss A/S © 2021.09

Safe Torque Off

Operating Guide

2 Safety

2.1 Safety Symbols

The following symbols are used in this manual:

D A N G E R

Indicates a hazardous situation which, if not avoided, will result in death or serious injury.

W A R N I N G

Indicates a hazardous situation which, if not avoided, could result in death or serious injury.

C A U T I O N

Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

N O T I C E

Indicates information considered important, but not hazard-related (for example, messages relating to property damage).

Safety

2.2 Qualified Personnel

The products must only be assembled, installed, programmed, commissioned, maintained, and decommissioned by persons with
proven skills. Persons with proven skills:

•

Are qualified electrical engineers, or persons who have received training from qualified electrical engineers and are suitably
experienced to operate devices, systems, plant, and machinery in accordance with the general standards and guidelines for
safety technology.

•

Are familiar with the basic regulations concerning health and safety/accident prevention.

•

Have read and understood the safety guidelines given in this manual and also the instructions given in the operating guide of
the drive.

•

Have good knowledge of the generic and specialist standards applicable to the specific application.

2.3 Responsibilities of Users of Safety-related Power Drive Systems PDS(SR)

Users of safety-related Power Drive Systems (PDS(SR)) are responsible for:

•

Hazard and risk analysis of the application.

•

Identifying safety functions required and allocating SIL or PLr to each of the functions.

•

Other subsystems and the validity of signals and commands from these subsystems.

•

Designing appropriate safety-related control systems (hardware, software, parameterization, and so on).

2.4 Protective Measures

Qualified and skilled personnel must be available for installing and commissioning the safety engineering systems.

Procedure

1.

Install the drive in an IP54/NEMA 12 cabinet as per IEC 60529, or in an equivalent environment. In special applications, a
higher IP/NEMA rating may be necessary.

2.

Ensure short-circuit protection of the cable between terminal 37 and the external safety device according to ISO 13849-2
table D.4.

3.

Optional step: 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.

AQ355238304444en-000201 / 130R0955 | 7Danfoss A/S © 2021.09