SEW-Eurodrive CM3C63 Series User manual

*26870517_1123*
Drive Technology \ Drive Automation \ System Integration \ Services
Operating Instructions
Synchronous Servomotors (Medium Inertia)
CM3C63 – 100
Edition 11/2023 26870517/EN

SEW-EURODRIVE—Driving the world

Table of Contents
Operating Instructions – CM3C63 – 100 3
Table of Contents
1 General information ..................................................................................................................5
1.1 About this documentation ...............................................................................................5
1.2 Other applicable documentation .....................................................................................5
1.3 Structure of the safety notes ...........................................................................................5
1.4 Decimal separator in numerical values ...........................................................................6
1.5 Rights to claim under limited warranty ............................................................................7
1.6 Product names and trademarks......................................................................................7
1.7 Copyright notice ..............................................................................................................7
2 Safety notes...............................................................................................................................8
2.1 Preliminary information ...................................................................................................8
2.2 Duties of the user............................................................................................................8
2.3 Target group ...................................................................................................................9
2.4 Designated use ...............................................................................................................9
2.5 Restrictions of use ..........................................................................................................9
2.6 Magnetic fields ..............................................................................................................10
2.7 Transportation/storage..................................................................................................10
2.8 Installation/assembly.....................................................................................................11
2.9 Electric work..................................................................................................................11
2.10 Warning notes on the motor..........................................................................................12
2.11 Startup/operation ..........................................................................................................13
2.12 Inspection/maintenance ................................................................................................13
3 Motor structure........................................................................................................................14
3.1 Basic structure ..............................................................................................................14
3.2 Nameplate and type designation ..................................................................................15
3.3 Drive designs and options.............................................................................................18
3.4 Functional safety...........................................................................................................20
4 Mechanical installation...........................................................................................................21
4.1 Before you start.............................................................................................................21
4.2 Motor installation notes .................................................................................................22
4.3 Installation tolerances ...................................................................................................23
4.4 Screw sizes and tightening torques for flange mounting ..............................................23
4.5 Motor mounting to MD adapter .....................................................................................23
5 Electrical installation ..............................................................................................................25
5.1 General information ......................................................................................................25
5.2 Additional regulations....................................................................................................26
5.3 Wiring notes ..................................................................................................................27
5.4 Brake controls with functional control input...................................................................27
5.5 Connecting the motor and the encoder system via plug connector SM./SB./SH..........28
5.6 Connecting the two-cable technology ...........................................................................30
5.7 Connecting single-cable technology .............................................................................42
5.8 Connection with terminal box........................................................................................50
5.9 Prefabricated cables for two-cable technology .............................................................61
5.10 Prefabricated cables for single-cable technology .........................................................70
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Table of Contents
Operating Instructions – CM3C63 – 100
4
5.11 Assembling the cables ..................................................................................................73
5.12 Options..........................................................................................................................74
6 Startup......................................................................................................................................81
6.1 General information ......................................................................................................81
6.2 Before startup ...............................................................................................................83
6.3 Startup ..........................................................................................................................83
6.4 Startup after storage .....................................................................................................83
7 Inspection/maintenance .........................................................................................................85
7.1 General information ......................................................................................................85
7.2 Maintenance intervals ...................................................................................................86
7.3 Notes on the BK.. brake................................................................................................87
7.4 Notes on the BZ.. brake ................................................................................................87
7.5 Cleaning........................................................................................................................95
7.6 Connection cable ..........................................................................................................95
8 Technical data .........................................................................................................................96
8.1 Information on the technical data – conditions..............................................................96
8.2 Technical data of the BK.. brakes .................................................................................96
8.3 Technical data for the BZ.. and BZ..D brakes...............................................................98
8.4 Characteristic safety values of BK.. brakes ................................................................102
8.5 Characteristic safety values of BZ.. brakes.................................................................102
9 Malfunctions ..........................................................................................................................103
9.1 General information ....................................................................................................103
9.2 Malfunctions in the motor............................................................................................103
9.3 Brake malfunctions .....................................................................................................104
9.4 Encoder malfunctions .................................................................................................105
10 Service ...................................................................................................................................107
10.1 SEW-EURODRIVE service.........................................................................................107
11 Waste disposal ......................................................................................................................108
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1
General information
About this documentation
Operating Instructions – CM3C63 – 100 5
1 General information
1.1 About this documentation
The documentation at hand 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 Other applicable documentation
Observe the corresponding documentation for all additional components.
1.2.1 Additional information
This documentation contains additional information on the product or optional compo-
nents:
• Wiring diagrams provided with the motor
• Addendum to the operating instructions "Safety Encoder and Safety Brake"
1.3 Structure of the safety notes
1.3.1 Meaning of signal words
The following table shows the graduation and meaning of the signal words in the
safety notes.
Signal word Meaning Consequences if not observed
DANGER Imminent danger Death or severe injuries
WARNING Possibly dangerous situation Death or severe injuries
CAUTION Possibly 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.
1.3.2 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.
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1General information
Decimal separator in numerical values
Operating Instructions – CM3C63 – 100
6
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.
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
No access for persons with pacemakers or implanted defibril-
lators
Warning of hot surfaces
Warning of risk of crushing
Warning of automatic restart
1.3.3 Structure of embedded safety notes
Embedded safety notes are directly integrated into the instructions just before the de-
scription of the dangerous step.
This is the formal structure of an embedded safety note:
 SIGNAL WORD! Type and source of danger. Possible consequence(s) if disre-
garded. Measure(s) to prevent danger.
1.4 Decimal separator in numerical values
In this document, a period is used to indicate the decimal separator.
Example: 30.5kg
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1
General information
Rights to claim under limited warranty
Operating Instructions – CM3C63 – 100 7
1.5 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.
1.6 Product names and trademarks
The product names mentioned in this documentation are trademarks or registered
trademarks of the respective titleholders.
1.7 Copyright notice
©2023SEW‑EURODRIVE. All rights reserved. Copyright law prohibits the unautho-
rized reproduction, modification, distribution and use of this document – in whole or in
part.
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2Safety notes
Preliminary information
Operating Instructions – CM3C63 – 100
8
2 Safety notes
2.1 Preliminary information
The following general safety notes serve the purpose of preventing injury to persons
and damage to property. They primarily apply to the use of products described in this
documentation. If you use additional components, also observe the relevant warning
and safety notes.
2.2 Duties of the user
As the user, you must ensure that the basic safety notes are observed and complied
with. Make sure that persons responsible for the machinery and its operation as well
as persons who work on the device independently have read through the documenta-
tion carefully and understood it.
As the user, you must ensure that all of the work listed in the following is carried out
only by qualified specialists:
• Setup and installation
• Installation and connection
• Startup
• Maintenance and repairs
• Shutdown
• Disassembly
Ensure that the persons who work on the product pay attention to the following regula-
tions, conditions, documentation, and information:
• The national and regional regulations governing safety and the prevention of acci-
dents
• The warning and safety signs on the product
• All other associated project planning documents, installation and startup instruc-
tions, as well as wiring diagrams
• Do not assemble, install or operate damaged products
• All system-specific specifications and regulations
Ensure that systems in which the product is installed are equipped with additional
monitoring and protection devices. Observe the applicable safety regulations and leg-
islation governing technical work equipment and accident prevention regulations.
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2
Safety notes
Target group
Operating Instructions – CM3C63 – 100 9
2.3 Target group
Specialist for me-
chanical work
Any mechanical work may be performed only by adequately qualified specialists. Spe-
cialists in the context of this documentation are persons who are familiar with the
design, mechanical installation, troubleshooting, and maintenance of the product, and
who possess the following qualifications:
• Qualifications in the field of mechanics in accordance with the national regulations
• Familiarity with this documentation
Specialist for elec-
trotechnical work
Any electrotechnical work may be performed only by electrically skilled persons with a
suitable education. Electrically skilled persons in the context of this documentation are
persons who are familiar with electrical installation, startup, troubleshooting, and main-
tenance of the product, and who possess the following qualifications:
• Qualifications in the field of electrical engineering in accordance with the national
regulations
• Familiarity with this documentation
Additional qualifi-
cations
In addition to that, these persons must be familiar with the valid safety regulations and
laws, as well as with the requirements of the standards, directives, and laws specified
in this documentation.
The persons must have the express authorization of the company to operate, pro-
gram, parameterize, label, and ground devices, systems, and circuits in accordance
with the standards of safety technology.
Instructed persons All work in the areas of transport, storage, installation, operation and waste disposal
may only be carried out by persons who are trained and instructed appropriately.
These instructions must enable the persons to carry out the required activities and
work steps safely and in accordance with regulations.
2.4 Designated use
The product is intended for use in industrial and commercial systems.
In the case of installation in electrical systems or machines, it is prohibited to start the
proper operation of the product until it is determined that the machine meets the re-
quirements stipulated in the local laws and directives.
The standards given in the declaration of conformity apply to the product.
2.5 Restrictions of use
The following applications are prohibited unless the device is explicitly designed for
such use:
• Use in potentially explosive areas.
• Use in areas exposed to harmful oils, acids, gases, vapors, dust, and radiation.
Synchronous servomotors in design without encoder and with the ELSM® control
mode must not be used in lifting applications. This control mode is permitted only
for applications of horizontal materials handling.
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2Safety notes
Magnetic fields
Operating Instructions – CM3C63 – 100
10
2.6 Magnetic fields
The rotor of the motor is equipped with permanent magnets. The magnets emit strong
magnetic fields, even when no current is supplied. If permanent magnets are exposed,
e.g. in case of removed rotor, health hazards may arise. This especially applies to per-
sons with active medical implants.
Further, exposed permanent magnets cause strong forces of attraction with magnetiz-
able materials, such as other motor components or tools. The attraction of other ob-
jects can cause severe injuries by crushing.
During operation, additional electromagnetic fields are generated.
Observe DGUV (German Social Accident Insurance) regulation15–"Electromagnetic
fields" for use in industrial workplaces. In other countries, the corresponding national
and local regulations and provisions must be complied with.
2.7 Transportation/storage
Observe the following notes when transporting the device:
• Inspect the shipment for damage as soon as you receive the delivery. Inform the
shipping company immediately about any damage. If the product is damaged, it
must not be assembled, installed or started up.
• Note that retaining straps attached to the products might be under tension. To
avoid cutting injuries, remove the retaining straps carefully from the product and
wear suitable protective clothing, if necessary.
• The open keyway has sharp edges. Insert the key in the keyway and pull a protec-
tive tubing over the shaft.
• If the product weights more than 40 kg, use suitable lifting equipment such as
belts.
• Always use lifting eyebolts and lifting eyes if available.
• Tighten lifting eyebolts.
• The lifting eyes/bores are designed to carry only the weight of the product without
mount-on components. Mount-on units have separate suspension attachments, if
necessary. Additionally use these attachments as described in the relevant operat-
ing instructions. Do not mount any additional loads.
• Adhere to DIN580 for using lifting devices. The tension force vector of the slings
must not exceed a 45° angle.
• Note the hazard from suspended loads. Do not stand under suspended loads. Se-
cure the area where suspended loads can fall down. Secure loads using suitable
holding fixtures (e.g. belts) before lifting them.
• If necessary, use suitable, sufficiently dimensioned handling equipment.
• Store the product in a dry, dust-free room if you do not install it right away.
• If you store the product for a longer time (independent of packaging and ambient
conditions), observe the chapter "Startup after storage"(→283).
• Ensure that the product is not subject to mechanical impact.
• Do not transport or store the product on the fan guard.
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2
Safety notes
Installation/assembly
Operating Instructions – CM3C63 – 100 11
2.8 Installation/assembly
• Ensure that the product is installed and cooled according to the regulations in the
documentation.
• Protect the product from strong mechanical strain.
• The product and its mounting parts must never protrude into the path of persons or
vehicles.
• Ensure that components are not deformed and insulation spaces are not changed,
particularly during transportation and handling.
• Electric components must not be mechanically damaged or destroyed.
• If you remove mechanical strained or heavy components, secure the construction
to prevent injuries.
2.9 Electric work
2.9.1 Carrying out electric work safely
Observe the following information to carry out electrical work safely during installation
and maintenance:
• Electrical work may only be carried out by electrically skilled persons.
• Always adhere to the 5 safety rules for working on electrical components:
– Disconnect
– Secure the drive against restart
– Check that no voltage is applied
– Ground and short-circuit it
– Cover or safeguard neighboring live parts
• When the device is switched on, dangerous voltages are present on all power con-
nections as well as on any connected cables and terminals. This is also the case
even if the motor is at standstill.
• Ensure that the connection boxes are closed and screwed down before applying
the supply voltage.
• Ensure that all required covers are mounted before applying the supply voltage.
2.9.2 Regenerative operation of drives
Moving the output element (e.g. coasting) generates a voltage at the live components
of the motor connection. Observe the following information to avoid electric shock:
• Do not touch open live components (e.g. male contacts of the plug connector, ter-
minals).
• Secure all open live components with a touch guard.
• Secure the output shaft against rotation when working without touch guard.
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2Safety notes
Warning notes on the motor
Operating Instructions – CM3C63 – 100
12
2.9.3 Disconnecting and connecting plug-in connections while voltage is applied
An electric arc may occur when plug-in connections are disconnected or connected
while voltage is applied (e.g. connection between drive and control). Observe the fol-
lowing to avoid risk of injury, risk of electric shock and damage to property:
• Ensure that the product is de-energized before disconnecting and connecting the
plug-in connections.
2.9.4 Electrical connection
The connection must be a permanently secure electrical connection (no protruding
wire ends). Use the corresponding cable end equipment. Establish a safe protective
earth connection. When the motor is connected, the distances to non-insulated and
live parts must not be shorter than the minimum values according to IEC60664 and to
national regulations. With low voltage, the distances should be no shorter than the fol-
lowing values, in compliance with IEC60664:
Nominal voltage VNDistance
≤ 500V 3mm
≤ 690V 5.5mm
The terminal box must be free from foreign objects, dirt and humidity. Unused cable
entry openings and the connection box itself must be sealed so that they are dust- and
water-proof.
2.10 Warning notes on the motor
Observe the warning safety notes specified on the motor. The following safety notes
can be found on the motor:
Safety note Meaning
Do not connect or disconnect the plug-in connection when
voltage is applied.
–
17123852
–
–
For motors with BK.. brake:
Adhere to the specified polarity of the power supply of the
BK.. brake. Check the polarity when replacing the brake.
Warning of hot surfaces.
The attached safety notes can become dirty or illegible over time. Always make sure
that safety and operating notes are legible. Replace damaged labels.
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2
Safety notes
Startup/operation
Operating Instructions – CM3C63 – 100 13
2.11 Startup/operation
Make sure the connection boxes are closed and screwed before connecting the sup-
ply voltage.
Depending on the degree of protection, products may have live, uninsulated, and
sometimes moving or rotating parts as well as hot surfaces during operation.
When the device is switched on, dangerous voltages are present on all power connec-
tions as well as on any connected cables and terminals. This can also be the case if
the motor is at standstill.
Risk of burns due to arcing: Do not disconnect power connections during operation.
Do not connect power connections during operation.
Mechanical blocking or internal protective functions of the product can cause a motor
standstill. Removing the cause of this problem or performing a reset can result in the
machine or the system re-starting on its own. First, disconnect the product from the
supply system before you start troubleshooting.
Risk of burns: The surface temperature of the product can exceed 60°C during opera-
tion. Do not touch the product during operation. Let the product cool down before
touching it.
2.12 Inspection/maintenance
Use only genuine spare parts in accordance with the valid spare parts list.
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3Motor structure
Basic structure
Operating Instructions – CM3C63 – 100
14
3 Motor structure
3.1 Basic structure
The following figures are schematic representations. Motor size and design may
cause deviations.
3.1.1 Structure of the motor without brake
The following figure shows an overview of the motor components:
[1]
[4]
[3]
[2]
[6]
[5]
28956583947
[1] Output shaft with key [4] Housing
[2] Flange [5] Power plug connector
[3] Eyebolt [6] Signal plug connector
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3
Motor structure
Nameplate and type designation
Operating Instructions – CM3C63 – 100 15
3.2 Nameplate and type designation
3.2.1 Nameplate on the motor
The following figure shows the 1st nameplate of a CM3C.. motor:
[2]
[8]
[7]
[6]
[5]
[4]
[3]
[2]
[8]
[9] [9]
[7]
[6]
[5]
[4]
[3]
[1]
CM3C71S-20A-P/BZ/DI/PK/AZ2Z/SD1
01.7825733307.0001.20
Mo 6,5 Nm
Mpk 19,5 Nm
Io 3,5 A
Imax 12,2 A
Usys 400 V
PS1 1,28 Kw
IM B5
IP 65
kg 13,876
Th.Kl. 155(F)
TENV ML 03
nS1 2000r/min
VTnC 0-2000 r/min
n max 7200 r/min
Up 257 V
Ta -20..40 °C
Mbr 17 Nm
Ubr 218-243 AC V
3~IEC60034 22935908 Made in Germany
DI0E00
Jahr2020
Line Specifications (from left to right)
[1] • Type code of the MOVILINK® DDI interface
[2] • Type designation
[3] • Serial number
[4]
• Standstill torque
• Variable torque
• Speed class
• Mounting position
[5]
• Dynamic limit torque of the motor
• Maximum permitted speed
• Degree of protection according to IEC 60034-5
[6]
• Standstill current
• Voltage at the open terminals of the motor at rated speed
• Mass
[7]
• Maximum permitted current
• Ambient temperature
• Thermal class
[8]
• System voltage, voltage of the supplying inverter
• Nominal braking torque
• TENV (Totally Enclosed Non-Ventilated)
• Mounting location (plant code)
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3Motor structure
Nameplate and type designation
Operating Instructions – CM3C63 – 100
16
Line Specifications (from left to right)
[9]
• Rated power continuous duty
• Brake voltage
• Rated speed continuous duty
The following figure shows the 2nd nameplate of a CM3C.. motor:
02
[1]
[2]
CM3C71S-20A-P/BZ/DI/PK/AZ2Z/SD1
01.7825733307.0001.20
nur Umrichterbetrieb 22936149
UA.TR.
013
E189357
Line Information
[1] • Type designation
[2] • Serial number
The following table lists all the markings that can be provided on a nameplate, and an
explanation of what they mean:
CE marking to state compliance with European Directives (see EU Declara-
tion of Conformity).
SEW
DRN90L4 1.5 kW
22785868.10
CEL mark to represent the energy efficiency in the Chinese grade classifi-
cation.
CMIM logo to confirm compliance with the technical regulations of Mo-
rocco.
02
FS logo with 2-digit number for identification of installed functional safety
motor options.
UR mark to confirm that UL (Underwriters Laboratory) is informed about the
registered components; register number by UL: E337323
CSA mark to confirm the market conformity of the Canadian Standard As-
sociation (CSA).
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3
Motor structure
Nameplate and type designation
Operating Instructions – CM3C63 – 100 17
EAC mark (EurAsian Conformity)
Confirms compliance with the technical regulations of the economic and
customs union of Russia, Belarus, Kazakhstan, Armenia.
The UA.TR mark declares conformity with the technical regulations of
Ukraine.
The UKCA mark states compliance with British guidelines.
Motors and accessories may fall within the scope of the country-specific
application of the WEEE Directive. Dispose of the product and of its acces-
sories according to the national regulations of your country.
Product label with QR code. The QR code on the product can be scanned.
You will be redirected to the Digital Services of SEW‑EURODRIVE. There,
you have access to product-specific data, documents, and further services.
3.2.2 Serial number
The following table lists the structure of a serial number:
Example: 01. 7718569609. 0001.19
01. Sales organization
77185696 Order number (8 digits)
09. Order item (2 digits)
0001 Quantity (4 digits)
19 End digits of the year of manufacture (2 digits)
3.2.3 Type designation
This table shows an example type designation:
CM3C80L-60A-K/PK/RH1M/SMB
CM3C Product family
80L Size and length of the motor
60A Rated speed and system voltage
KShaft design
/PK Temperature sensor
/RH1M Encoder
/SMB Plug connector
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3Motor structure
Drive designs and options
Operating Instructions – CM3C63 – 100
18
3.3 Drive designs and options
3.3.1 Synchronous servomotors
Designation
CM3C.. CM3C.. series (medium inertia)
63, 71, 80, 100 Sizes
S, M, L Lengths
-20, -30, -45, -60
Speed classes:
-20 = 2000 min-1
-30 = 3000min-1
-45 = 4500min-1
-60 = 6000min-1
ASystem voltage:
A = 400V
-N, -K, -P, -E
Shaft design:
-N = Shaft without key
-K = Shaft with key
-P= Shaft with pinion shaft end
-E = Shaft with push-in pinion
3.3.2 Brakes and brake control
Designation Option
/BK Permanent-magnet holding brake
/BZ1) Spring-loaded holding brake with increased working capacity
/BZ..D Spring-loaded holding brake with increased working capacity
for operation on direct DC voltage supply
/HR Manual brake release of BZ.., BZ..D, and BZ..Z brake
Automatic re-engaging
1) Optionally available as safety brake.
3.3.3 Temperature sensor/temperature detection
Designation Option
/PK Pt1000 temperature sensor
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3
Motor structure
Drive designs and options
Operating Instructions – CM3C63 – 100 19
3.3.4 Encoder
Designation Option Ability class
– Without encoder –
/RH1M Single-turn encoder, resolver (standard) Medium Class
/AK0H1) Multi-turn encoder, HIPERFACE®High Class
/AK1H1) Multi-turn encoder, HIPERFACE®High Class
/EK1H Single-turn encoder, HIPERFACE®High Class
/EZ2Z Single-turn encoder, MOVILINK® DDI Medium Class
/AZ2Z Multi-turn encoder, MOVILINK® DDI Medium Class
/EZ4Z Single-turn encoder, MOVILINK® DDI High Class
/AZ4Z Multi-turn encoder, MOVILINK® DDI High Class
/EH1E1) Single-turn encoder, EnDat2.2 High Class
/AH1E1) Multi-turn encoder, EnDat2.2 High Class
/EK0J2) Single-turn encoder, HIPERFACE®High Class
/AK0J1), 2) Multi-turn encoder, HIPERFACE®High Class
/AH1Q1), 2) Multi-turn encoder, DRIVE-CLiQ High Class
1) Optionally available as safety encoder.
2) Available on request.
3.3.5 Fan
Designation Option
/VR Forced cooling fan
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3Motor structure
Functional safety
Operating Instructions – CM3C63 – 100
20
3.4 Functional safety
Motors from SEW‑EURODRIVE are optionally available with functionally safe motor
options. These are designed for implementing safety functions.
SEW‑EURODRIVE labels a functionally safe motor option at the drive with an FS logo
and a 2-digit number on the motor nameplate. The number is a code that indicates
which components in the drive are safety-related. This makes it possible to uniquely
identify an available functional safety motor option via the motor nameplate.
FS logo
Available functionally safe motor option
Decentralized in-
verters Safety brake Safety encoders
01
X
02
X
04
X
07
X X
11
X X
If the FS logo, e.g. with the code "FS-11" is present on the motor nameplate, the com-
bination of safety encoder and safety brake is available for the motor. Drives can also
be equipped with two encoders, e.g. built-in encoder and add-on encoder. In such
cases, the FS logo for the safety encoder always relates to the add-on encoder. If an
FS logo is available, adhere to the information specified in the corresponding docu-
mentation.
If the drive bears the FS logo on the nameplate, adhere to the information in the fol-
lowing documentation:
• Addendum to the operating instructions "Safety encoders and safety brakes for
synchronous servomotors CMP, CMPZ, and CM3C.."
In the addendum to the operating instructions "Safety encoders and safety brakes for
synchronous servomotors CMP, CMPZ, and CM3C.." the characteristic safety values
for determining the safety level of systems and machines are specified in chapter
"Characteristic safety values".
26870517/EN – 11/2023