SEW Eurodrive MC07B User Manual

Drive Technology \ Drive Automation \ System Integration \ Services

Manual

MOVITRAC

®

MC07B

Functional Safety

Edition 12/2011 19396414 / EN

SEW-EURODRIVE—Driving the world

Contents

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Contents

1 General Information............................................................................................ 4

1.1 How to use this documentation................................................................... 4

1.2 Underlying standards.................................................................................. 4

1.3 Structure of the safety notes......................................... ... ........................... 5

1.4 Rights to claim under warranty ................................................................... 6

1.5 Exclusion of liability..................................................................................... 6

1.6 Copyright notice.......................................................................................... 6

1.7 Document content....................................................................................... 6

1.8 Other applicable publications...................................................................... 6

2 Integrated Safety Technology............................................................................ 7

2.1 Safe condition ........... .... ... ... ... .... ... .......................................... .................... 7

2.2 Safety concept ............................................................................................ 7

2.3 Schematic representation – "safety concept for MOVITRAC

2.4 Safety functions .......................................................................................... 9

2.5 Restrictions ............................................................................................... 11

3 Safety Conditions.............................................................................................. 12

3.1 Approved devices ..................................................................................... 13

3.2 Installation requirements........................................................................... 14

3.3 Requirements on the external safety controller ........................................ 16

3.4 Requirements on startup........................................................................... 17

3.5 Requirements on operation....................................................................... 17

4 Connection Variants ......... .... ... ... ... .... ... ... .......................................... ............... 18

4.1 General information ................................ ... ... ... ... .... ... ...... .... ... ... ... ... .... ... .. 18

4.2 Requirements............................................................................................ 19

4.3 Disconnection of a single drive ................................................................. 20

4.4 Disconnection of group drives................................................................... 26

5 Technical Data .................................................................................................. 30

5.1 Safety characteristics................................................................................ 30

5.2 Electronics data X17: Signal terminal block for STO safety contact......... 30

Index................................................................................................................... 31

®

B"............... 8

Manual – Functional Safety MOVITRAC® MC07B

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General Information

How to use this documentation

1 General Information

Functional Safety MOVITRAC® MC07B

1.1 How to use this documentation

The documentation is an integral part of the product and contains impo rtant information
on operation and service. The documentation is written for all employees wh o assemble,
install, start up, and service this product.

The documentation must be accessible and legi ble. Make sure that persons responsible
for the system and its operation, as well as persons wh o work independently on the unit,
have read through the documentation carefully and understood it. If you are unclear
about any of the information in this documentation, or if you require further information,
contact SEW-EURODRIVE.

Make sure you always use the latest documentation and software version.
Our documentation is available in various languages for download from the SEW

homepage
about any of the info

You can also order the printed documentat io n from SEW-E URODRIVE.

1.2 Underlying standards

The safety assessment of the unit is based on the following standards and safety
classes:

. Consult SEW-EURODRIVE if you are unclear

rmation in this docu

mentation, or if you require further information.

Underlying standards

Safety class/underlying standard

• Performance level (PL) according to EN ISO 13849­1:2008

• Category 3 according to EN 954-1:1996

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Manual – Functional Safety MOVITRAC® MC07B

1.3 Structure of the safety notes

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1.3.1 Meaning of signal words

The following table shows the grading and meaning of the signal words for safety notes,
notes on potential risks of damage to propert y, an d ot he r no te s.

Signal word Meaning Consequences if disregarded

DANGER Imminent danger Severe or fatal injuries
WARNING Possible dangerous situation Severe or fatal injuries
CAUTION Possible dangerous situation Minor injuries

NOTICE Possible damage to property Damage to the drive system or its

INFORMATION Useful information or tip:

implifies the handling of the
drive system.

1.3.2 Structure of the section safety notes

Section safety notes do not apply to a specific action but to several actions pertaining to
one subject. The symbols used either indicate a general hazard or a specific hazard.

General Information

Structure of the safety notes

environment

1

This is the formal structure of a section safety note:

SIGNAL WORD

Type and source of danger.
Possible consequence(s) if disregarded.

• Measure(s) to prevent the danger.

1.3.3 Structure of the embedded safety notes

Embedded safety notes are directly integrated in the instructions just before the descrip­tion of the dangerous action.

This is the formal structure of an embedded safety note:

• SIGNAL WORD Type and source of danger.
Possible consequence(s) if disregarded.
– Measure(s) to prevent the danger.

Manual – Functional Safety MOVITRAC® MC07B

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General Information

Rights to claim under warranty

1.4 Rights to claim under warranty

A requirement of fault-free operation and fulfillment of any rights to claim under limited
warranty is that you adhere to the information in the MOVITRAC
Therefore, read the operating instructions before you start working with the unit.

Make sure that the documentation is available to persons responsible for the system and
its operation as well as to persons who work independently on the unit. You must also
ensure that the documentation is legible.

1.5 Exclusion of liability

Adherence to the operating instructions is essential to ensure safe operation of
MOVITRAC
performance features. SEW-EURODRIVE assumes no liability for injury to persons or
damage to equipment or property resulting from non-adherence to these operating
instructions. In such cases, any liability for defects is excluded.

1.6 Copyright notice

© 2010 – SEW-EURODRIVE. All rights reserved.
Copyright law prohibits the unauthorized duplication, modification, distribution, and use

of this document, in whole or in part.

®

documentation.

®

MC07B units and to achieve the specified product characteristics and

1.7 Document content

This publication contains conditions and amendments related to MOVITRAC® MC07B
units in safety-related applications.

The system comprises a drive inverter with AC motor and safety-tested external
disconnecting device.

1.8 Other applicable publications

This document supplements the MOVITRAC® MC07B operating instructions and limits
the application notes according to the fo llowing information. It may only be used togeth er
with the MOVITRAC

®

MC07B operating instructions.

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Manual – Functional Safety MOVITRAC® MC07B

2 Integrated Safety Technology

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The safety technology of MOVITR AC®MC07B units described below has been devel­oped and tested in accordance with the following safety requirements:

• Category 3 according to EN 954-1: 1996

• PL d according to EN ISO 13849-1: 2008

This was certified by TÜV Nord. Copies of the TÜV certificate can be obtained from
SEW-EURODRIVE.

2.1 Safe condition

For safety-related operation of MOVITRAC®MC07B, safe torque off is defined as safe
condition (see STO safety function). The safety concept is based on this definition.

2.2 Safety concept

Integrated Safety Technology

Safe condition

2

• In the event of danger, any potential risk related to a machine must be eliminated as
quickly as possible. Standstill with restart prevention is generally the safe condition
for preventing dangerous movements.

®

• The MOVITRAC
external safety relay. This safety relay disconnects all active ele ments (disconnec­tion of the safety-related 24 V power supply of the outpu t stage control) that generate
the pulse trains to the power output stage (IGBT) when a connected control device
(E-STOP button with latching function) is activated.

• Disconnecting the safety-related 24 V supply voltage ensures that the supply
voltages required for operating the inverter and consequently for generating a rotat­ing field of pulse patterns (w hich allow the generation of a rotating field) are s afely
interrupted, preventing automatic restart.

• Instead of galvanic separation of the drive from the power supply by means of relays
or switches, the disconnection of the 24 V supply described here safely prevents the
control of the power semiconductors in the drive inverter. This process disconnects
the rotating field generation for the respective motor. The individual motor cannot
develop any torque in this state even though the line voltage is still present.

MC07B inverter is characterized by the option to connect an

Manual – Functional Safety MOVITRAC® MC07B

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Integrated Safety Technology

Schematic representation – "safety concept for MOVITRAC® B"

2.3 Schematic representation – "safety concept for MOVITRAC® B"

[1]

[2]

[3]

[4]

[1] Safety-related DC 24 V voltage supply
[2] Electrical isolation
[3] Voltage supply for control of power transistors
[4] Pulse width modulated signals for the output stage

L1 L2 L3

S24V
S0V24

Uz+

Uz-

GND

S0V24

SNT

24V

SVI24

M

1797262603

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Manual – Functional Safety MOVITRAC® MC07B

2.4 Safety functions

v

t

t

1

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The following drive-related safety functions can be used:

• STO (safe torque off according to EN 61800-5-2) by disconnecting the STO input.
If the STO function is activated, the frequency inverter no longer supplies power to

the motor for generating torque. This safety function corresponds to a non- controlled
stop according to EN 60204-1, stop category 0.

The STO input must be disabled by a suitable external safety controller/safety relay.
The following figure shows the STO function:

Integrated Safety Technology

Safety functions

2

v Velocity
tTime
t

1

Time at which STO is triggered
Disconnection range

2463228171

Manual – Functional Safety MOVITRAC® MC07B

9

2

v

t

t

1

tt

2

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Integrated Safety Technology

Safety functions

• SS1(c) (safe stop 1, function variant c according to EN 61800-5-2) by means of
suitable external control (e.g. safety relay with delayed disconnection)

The following sequence is mandatory:
– Decelerate the drive using an appropriate brake ramp specified via setpoints.
– Disconnect the STO input (= triggering the STO function) after a specified safety-

related time delay.

This safety function corresponds to a controlled stop according to EN 602041, stop
category 1.

The following figure illustrates the SS1(c) function:

v Velocity
tTime
t

1

t

2

∆t Time between initiating the brake ramp and STO

Point of time when the brake ramp is initiated
Point of time when STO is triggered

Safe time delay range
Disconnection range

2463226251

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Manual – Functional Safety MOVITRAC® MC07B