CM3C.. series synchronous servomotors

Dynamic master of complexity

Highly dynamic, high-precision and high-performance drives are essential wherever heavy external loads need to be moved quickly and positioned accurately. CM3C.. synchronous servomotors combine precisely these features and also have an exceptionally compact and space-saving design.

The lowest possible ratio of load moment of inertia to motor moment of inertia is key for transporting heavy loads from A to B at high speed and with great precision. That's why CM3C.. series servomotors benefit from increased inertia. These servomotors are therefore particularly suited to all automation, handling and transport applications with a correspondingly high load moment of inertia. With their four sizes – 63, 71, 80 and 100 – they can cover standstill torques from 2.7 to 40 Nm.

The servomotors are also exceptionally small and have a space-saving design. What's more, the option of mounting the motor directly on the gear units (direct motor mounting) eliminates the need for adapters and couplings. The multi-stage surface protection concept and smooth surfaces (hygiene-friendly design) make the medium-inertia servomotors particularly robust and dirt repellent. In addition, the rotors, which are equipped with permanent magnets, deliver a very high level of efficiency, thus ensuring exceptionally energy-efficient operation.

Flexibility and reliability are also key features of the brakes that are available for the servomotors. Alongside the 24 V holding brake typically used for servomotors, users also have the option of a brake with increased working capacity. Thanks to this equipment, the synchronous motors can even handle applications where emergency braking is needed. Requirements of this kind are typical in machine automation, handling gantries and travel unit drives.

Thanks to our modular system, the highly flexible CM3C.. series servomotors can be adapted to meet specific needs. At the same time, single-cable technology means they can be installed quickly and integrated intelligently into state-of-the-art Industry 4.0 concepts.

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Facts about CM3C.. series servomotors

Properties & technical data
Benefits & areas of application
Digital motor and data integration
MOVIKIT® software modules
Functional safety
Further options
Product labels

Properties standard version

Four sizes – 63, 71, 80 and 100 – in three lengths – S, M and L
Compact and powerful thanks to cutting-edge magnet and winding technology
RH1M resolver
Adjustable right-angle flange sockets
PK temperature sensor (PT1000)
IP65 degree of protection
Long bearing service life
High permitted overhung loads

Stand-alone servomotor or direct gear unit mounting
Virtually no perceptible cogging
Continuous standstill torques (M₀) from 2.7 to 40 Nm
Maximum torques (M_pk) of up to 120 Nm
Up to four speed classes: 2000 min^-1, 3000 min^-1, 4500 min^-1and 6000 min^-1
Condition monitoring and extensive options for fault diagnostics with the MOVILINK^® DDI digital motor interface
Optimized operation on MOVIDRIVE^® inverters from the MOVI‑C^® modular automation system

Torque overview

Compare the continuous stall torques (M₀) with the maximum torques (M_PK) of the 63, 71, 80 and 100 series of the CM3C.. series synchronous servomotors.

Selected technical data

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All technical data and documents about the CM3C.. synchronous servomotor

The benefits for you

Space-saving installation
thanks to a small size, a compact design and direct gear unit mounting without adapters or couplings
Fast, reliable startup
with auto-tuning using the electronic nameplate
Less installation work
as a result of using motors with simple and cost-saving single-cable technology

Suitable for foodstuff applications
thanks to a dirt-repellent, hygiene-friendly design
Safe deceleration of heavy loads
using powerful spring-loaded brakes with increased working capacity
Optimum drive selection
thanks to our unique and versatile modular system

The CM3C.. series is highly versatile

Heavy-duty gantries
Cartesian robots
Palletizers
Deep drawing and forming machines

Dynamic removal and loading units
Machine tools
Hoist applications
Materials handling technology with heavy external loads

Materials handling technology/intralogistics

Hoist applications

Only half the solution without a gear unit?

Only half the solution without a gear unit? Not with SEW‑EURODRIVE's modular system! You can opt to combine the CM3C.. series servomotor with a helical, parallel-shaft helical, helical-worm, helical-bevel or SPIROPLAN^® gear unit, or with a servo planetary gear unit from the PxG series.

Find out more.

Digital motor and data integration

MOVILINK DDI

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Simple and fast motor startup with MOVILINK DDI

is possible thanks to the MOVILINK^® DDI digital interface. It's all based on single-cable technology. In fact, motors and inverters from the MOVI‑C^® modular automation system require just one hybrid cable for power supply and data transfer. The hybrid cable supplies the motor with power and MOVILINK^® DDI, a digital encoder, transfers all necessary power, brake and diagnostic data between inverter and motor. This saves you both time and money during installation and startup.

The digital motor and data integration works with synchronous motors, asynchronous motors and decentralized drive technology.

Find out more

MOVIKIT^® ready-to-use software modules are suitable for everything from simple drive functions through to complex motion control functions. Our goal is added value for you, shortening startup times considerably by providing configurable automation and motion control functions.

Examples of various MOVIKIT^® software modules:

MOVIKIT® Robotics

Application with robot controller and three red servo motors

MOVIKIT® Robotics includes MOVIKIT® software modules for robot control.

MOVIKIT® MultiAxisController

Application for packaging with two red servo motors

The MOVIKIT® MultiAxisController includes MOVIKIT® software modules for central control of any number of mechanically coupled drives.

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Functional safety overview

You can also request motors from the CM3C.. series with a safety brake and safety encoder. These can be integrated into the servomotor individually or in combination.
The following safety functions are possible with the safety brake:
- SBA (Safe Brake Actuation)
- SBH (Safe Brake Hold)
Using safety encoders, safety functions relating to rotational speed, direction of rotation, standstill and relative position are possible, such as SS1, SS2, SOS, SLA, SLS, SDI and SLI to IEC 61800‑5-2.

Available options

Forced cooling fan for enhanced thermal motor capacity utilization
Terminal box
Safety-rated design with brake and encoder
Explosion-protected design: ATEX and IECEx (in preparation)
All standard approvals (UL, CSA, EAC, UkrSEPRO, CEL and CMIM)
Optional encoder systems:
- HIPERFACE^® encoder with electronic nameplate
- Two-cable technology
- Scalable (128/1024 sin/cos)
- Single-turn and multi-turn

Encoderless design with hybrid plug connector
- Single-cable technology

MOVILINK^® DDI digital encoder interface
- Single-cable technology
- Scalable (12 bit / 18 bit)
- Single-turn and multi-turn

Compatible non-SEW encoder systems

DRIVE‑CLiQ from Siemens for operation using standard Siemens Sinumerik and Sinamics controllers
EnDat2.2 from HEIDENHAIN
HIPERFACE DSL from SICK Stegmann

Certifications / Conformity

CE (European Economic Area)
CEL (China)
CMIM (Morocco)
UL-approved (USA and Canada)

EAC (Customs Union of Russia, Kazakhstan and Belarus)
UKCA (United Kingdom)
UA.TR. (Ukraine)

Ready for use in your application:

CM3C.. series servomotors

Recommended for their compact design
Recommended for energy efficiency
Recommended for safety

Save time and money

and are impressively compact.

The electromechanical components and the drive electronics both benefit from an extremely compact design.

Further complementary features such as direct motor mounting on the gear unit, high torque density and less installation work between hardware components thanks to single-cable technology mean this combination is highly recommended if your focus is on saving time and money.

Flexible & energy efficient

during planning, startup and production.

The new CM3C.. series of synchronous motors achieves energy efficiency class IE5 – an advantage over asynchronous motors.

Only when combined with further motor features such as direct mounting on any gear unit, wide-ranging options and accessories, hygienic design credentials and a cable length of 200 m between motor and inverter, however, does this create a truly flexible and energy-efficient solution.

Functional safety & reliable availability

that extends worldwide.

You can also request the motors from the CM3C.. series with a safety brake and safety encoder – to make protection against personal injury as easy as possible in your system, for example. Used individually or in combination, the functionally safe options contribute to a safe concept.

The modular system also means you are dealing with just one supplier, who delivers worldwide and ensures both short delivery times and long-term product availability.