SEW-Eurodrive MOVIFIT MC User manual

*29157056_0919*

Drive Technology \ Drive Automation \ System Integration \ Services

Manual

MOVIFIT®MC

Functional Safety

Edition 09/2019 29157056/EN

SEW-EURODRIVE—Driving the world

Contents

Manual – Functional Safety 3

Contents

1 General information.................................................................................................................. 4

1.1 About this documentation ...............................................................................................4

1.2 Structure of the safety notes ...........................................................................................4

1.3 Rights to claim under limited warranty ............................................................................6

1.4 Content of the documentation.........................................................................................6

1.5 Other applicable documentation .....................................................................................6

1.6 Product names and trademarks......................................................................................6

1.7 Decimal separator in numerical values ...........................................................................6

1.8 Copyright notice ..............................................................................................................6

2 MOVIFIT® MC safety concept................................................................................................... 7

2.1 Functional description .....................................................................................................7

2.2 MOVIFIT® MC block diagram.........................................................................................8

2.3 Restrictions .....................................................................................................................8

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

3 Safety-related conditions....................................................................................................... 11

3.1 Approved devices .........................................................................................................11

3.2 Installation requirements...............................................................................................13

3.3 External safety controller requirements ........................................................................13

3.4 Startup requirements ....................................................................................................15

3.5 Operation requirements ................................................................................................16

4 Hazard caused by drive coasting.......................................................................................... 17

5 Electrical installation.............................................................................................................. 18

5.1 Installation instructions..................................................................................................18

5.2 Safety-related disconnection MOVIFIT® ......................................................................19

6 Service..................................................................................................................................... 23

6.1 Diagnostics for STO......................................................................................................23

6.2 EBOX replacement .......................................................................................................24

7 Technical data......................................................................................................................... 25

7.1 Safety characteristics....................................................................................................25

7.2 Technical data MOVIFIT® MC (safety technology) ......................................................25

Index ........................................................................................................................................ 26

29157056/EN – 09/2019

1General information

About this documentation

Manual – Functional Safety

1 General information

1.1 About this documentation

The current version of the documentation is the original.

This documentation is an integral part of the product. The documentation is intended

for all employees who perform work on the product.

Make sure this documentation is accessible and legible. Ensure that persons respon-

sible for the systems and their operation as well as persons who work on the product

independently 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.

1.2 Structure of the safety notes

1.2.1 Meaning of signal words

The following table shows the grading and meaning of the signal words for safety

notes.

Signal word Meaning Consequences if disregarded

DANGER Imminent hazard 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 product or its envi-

ronment

INFORMATION Useful information or tip: Simplifies

handling of the product.

1.2.2 Structure of section-related safety notes

Section-related safety notes do not apply to a specific action but to several actions

pertaining to one subject. The hazard symbols used either indicate a general hazard

or a specific hazard.

This is the formal structure of a safety note for a specific section:

SIGNAL WORD

Type and source of hazard.

Possible consequence(s) if disregarded.

• Measure(s) to prevent the hazard.

29157056/EN – 09/2019

General information

Structure of the safety notes

Manual – Functional Safety 5

Meaning of the hazard symbols

The hazard symbols in the safety notes have the following meaning:

Hazard symbol Meaning

General hazard

Warning of dangerous electrical voltage

Warning of hot surfaces

Warning of risk of crushing

Warning of suspended load

Warning of automatic restart

1.2.3 Structure of embedded safety notes

Embedded safety notes are directly integrated into the instructions just before the de-

scription of the dangerous action.

This is the formal structure of an embedded safety note:

SIGNAL WORD Type and source of hazard. Possible consequence(s) if disregar-

ded. Measure(s) to prevent the hazard.

29157056/EN – 09/2019

1General information

Rights to claim under limited warranty

Manual – Functional Safety

1.3 Rights to claim under limited warranty

Read the information in this documentation. This is essential for fault-free operation

and fulfillment of any rights to claim under limited warranty. Read the documentation

before you start working with the product.

1.4 Content of the documentation

This documentation contains additional safety-related information and conditions for

operation in safety-related applications.

1.5 Other applicable documentation

This documentation supplements the operating instructions of the associated product.

Use this document only in connection with the operating instructions.

Always use the latest edition of the documentation and the software.

The SEW‑EURODRIVE website (www.sew‑eurodrive.com) provides a wide selection

of documents for download in various languages. If required, you can also order prin-

ted and bound copies of the documentation from SEW‑EURODRIVE.

1.6 Product names and trademarks

The brands and product names in this documentation are trademarks or registered

trademarks of their respective titleholders.

1.7 Decimal separator in numerical values

In this document, a period is used to indicate the decimal separator.

Example: 30.5kg

1.8 Copyright notice

tion, distribution or any other use of the whole or any part of this documentation is

strictly prohibited.

29157056/EN – 09/2019

MOVIFIT® MC safety concept

Functional description

Manual – Functional Safety 7

2 MOVIFIT® MC safety concept

The described safety technology of the MOVIFIT® device has been developed and

tested in accordance with performance level d to ENISO13849‑1:2015.

This was certified by TÜV Nord. Copies of the TÜV certificate and the corresponding

report are available from SEW‑EURODRIVE on request.

2.1 Functional description

The MC design of the MOVIFIT® acts as a power distributor and communication inter-

face for controlling up to 3 MOVIMOT® drives. MOVIFIT® MC allows for the connection

of an external safety controller (or an external safety relay). If the connected emer-

gency stop device (e.g. emergency off button with latching function) is activated, the

safety controller disconnects the 24V supply voltage that is required for creating a ro-

tating field for the connected MOVIMOT® drive.

The 24V_P supply voltage (safety-related 24 V supply voltage) is connected in the

ABOX at the X29 terminal and fed to the EBOX via a plug strip. The EBOX houses

electronic components, such as a short-circuit protection, voltage monitor, RS485

transceiver and coupler. The safety-related 24V_P supply voltage is routed through a

polarity protection diode at the input of the EBOX. A switch-mode power supply

(SMPS) generates 5 V voltage from the safety-related 24 V voltage for the RS485

transceiver and the coupler. Short-circuit protection of the positive pole of the safety-

related 24 V voltage protects the contactor tracks of the MOVIFIT® and the hybrid

cables connected to the MOVIFIT®. In the ABOX, the safety-related 24V voltage is

distributed to the terminal strips X71, X81, and X91 or the plug connectors X7, X8, and

X9. The terminal strips of plug connectors serve to connect the respective MOVIMOT®

drives. Further, the RS+, RS- signals and the supply system cables L1, L2, L3 are for-

warded to the MOVIMOT® drives.

For the connection between the terminal strips X71, X81, and X91 or the plug con-

nectors X7, X8, and X9 and the MOVIMOT® drives, SEW‑EURODRIVE recommends

prefabricated hybrid cables that have been designed and shielded especially for this

purpose.

The connected MOVIMOT® inverters can de-energize all active elements that are re-

quired for creating pulse trains at the power output stage (IGBT) if the safety-related

24 V supply voltage is disconnected. This ensures that the MOVIMOT® inverter no

longer supplies power to the motor for generating torque.

External connection via a controller that

• Is approved for at least PL d according to ENISO13849-1

• Disconnects with at least PL d according to ENISO13849-1

MOVIFIT® MC devices can be used with:

• Safe Torque Off according to EN61800‑5‑2

• Safe Stop 1 according to EN61800-5-2

• Restart inhibit in accordance with ENISO 14118

• In compliance with performance level d according to ENISO13849-1.

MOVIFIT® MC supports stop categories 0and 1 according to EN60204-1.

29157056/EN – 09/2019

2MOVIFIT® MC safety concept

MOVIFIT® MC block diagram

Manual – Functional Safety

2.2 MOVIFIT® MC block diagram

MOVIFIT®

MC block

diagram

The following block diagram shows the MOVIFIT® MC safety concept:

SNT

ABOX EBOX

MOVIMOT®

RS+

RS-

X45X7

X71

X81

X91

MOVIMOT®1

MOVIMOT®2

MOVIMOT®3

+24V_P

0V24_P

STO_P

STO_M

X29

24V

[2]

[10]

[9] [8] [7]

[6]

[5]

[4][3]

[1]

27021601858448651

[1] Field

[2] External safety controller (with MOVIFIT® without PROFIsafe option)

[3] Short-circuit protection

[4] 24V_P voltage monitor

[5] Voltage status 24V_P

[6] MOVIFIT® processor

[7] Serial interface

[8] Coupler

[9] Transceiver

[10] SEW‑EURODRIVE hybrid cable

2.3 Restrictions

WARNING

Electric shock due to dangerous voltages in the ABOX. If the safety-related 24 V

voltage is disconnected, MOVIFIT® device remains connected to the line voltage.

Severe or fatal injuries.

• De-energize the new MOVIFIT® device. Observe the minimum switch-off time

after disconnection from the supply system:

–1 minute

• The safety concept is only suitable for performing mechanical work on driven sys-

tem/machine components.

• A system/machine-specific risk assessment must at all costs be carried out by the

system/machine manufacturer and be observed when using the MOVIFIT® MC

device.

29157056/EN – 09/2019

MOVIFIT® MC safety concept

Safety functions

Manual – Functional Safety 9

2.4 Safety functions

The following drive-related safety functions can be used:

2.4.1 STO – Safe Torque Off

When the STO function is active, the inverter does not supply any power to the motor.

The drive cannot generate torque. This safety function corresponds to a non-con-

trolled 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 illustrates the STO function:

9007201225613323

Drive safety function trips

v = Speed

t = Time

t1 = Point of time when STO is triggered

INFORMATION

The motor coasts to a halt or is stopped mechanically.

Controlled standstill is preferred, if possible (see SS1).

29157056/EN – 09/2019

2MOVIFIT® MC safety concept

Safety functions

Manual – Functional Safety

2.4.2 SS1(c) – Safe Stop 1

Adhere to the following procedure:

• Decelerate the drive using an appropriate brake ramp specified via setpoint inputs.

• 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60204‑1, stop

category 1.

The following figure illustrates the SS1(c) function:

∆t

9007201225618443

Drive safety function monitoring

Drive safety function trips

v = Speed

t = Time

t1 = Point of time when SS1(c) is activated and the braking action is triggered

t2 = Point of time when STO is triggered

Δt = Safety-related period of time

INFORMATION

• The SS1(c) function does not monitor the stopping of the drive.

• The safety-related period of time Δt allows the drive to come to a stop. In the

event of a fault, the drive does not come to a stop and becomes de-energized at

the time t2 (STO).

29157056/EN – 09/2019

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