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- Siemens
- 1FK7042-2AF71-1UA0
- Synchronous Motor
- Germany
- 48 mm
- 4.602 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Siemens 1FK7042-2AF71-1UA0 SIMOTICS S Synchronous Motor is a compact permanent-magnet servo motor in the SIMOTICS S-1FK7 family. It is specified for a 600 V DC-link drive system, with a rated power of approximately 0.82 kW, a rated speed of 3,000 rpm and a static torque of 3 Nm under the 100 K temperature-rise condition.
This motor features natural cooling, a shaft with feather key, a multipole resolver with a DRIVE-CLiQ interface, and a Pt1000 temperature sensor. Unlike versions equipped with a holding brake, the 1UA0 configuration does not include an integrated holding brake. These configuration details are important when matching the motor to a machine axis and its associated drive equipment.
The motor is suited to servo applications requiring controlled rotary motion and feedback-based speed or position regulation. Its resolver feedback supports closed-loop operation with a compatible Siemens drive, while the temperature sensor allows the drive system to monitor the motor’s thermal condition when correctly configured.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model / Order Number | 1FK7042-2AF71-1UA0 |
| Product Family | SIMOTICS S-1FK7 |
| Product Type | Synchronous Servo Motor |
| Motor Series | 1FK7-CT |
| Rated Power | 0.82 kW |
| DC-Link Voltage | 600 V DC |
| Rated Speed | 3,000 rpm |
| Static Torque (100 K) | 3 Nm |
| Cooling Method | Natural cooling |
| Mounting Design | IM B5 (IM V1, IM V3) |
| Shaft Design | Shaft with feather key |
| Shaft Tolerance | N |
| Feedback Device | Multipole resolver |
| Feedback Interface | DRIVE-CLiQ |
| Temperature Sensor | Pt1000 |
| Holding Brake | Without holding brake |
| Degree of Protection | IP64 |
| Shaft Height | 48 mm |
| Weight | 4.602 kg |
Product Features
- Permanent-magnet synchronous construction: Supports controlled servo operation with a compatible drive system.
- Resolver-based feedback: Provides rotor-position feedback through a multipole resolver configuration.
- DRIVE-CLiQ interface: Connects the motor feedback system to compatible Siemens drive equipment.
- Integrated temperature monitoring: The Pt1000 sensor supports monitoring of motor temperature through a compatible drive configuration.
- Natural cooling: Uses the motor’s specified cooling arrangement without a separate motor-cooling circuit.
- Keyed shaft: Provides a mechanical interface for compatible couplings and transmission components.
- No integrated holding brake: Suits installations where a holding brake is not required or is provided separately by the machine design.
- IP64 protection: Protects against dust ingress and water splashes under the specified enclosure test conditions.
Working Principle
The 1FK7042-2AF71-1UA0 operates through interaction between the stator’s controlled magnetic field and the permanent magnets in the rotor. A compatible servo drive supplies regulated current to the stator windings, generating torque and producing controlled rotation.
The multipole resolver supplies rotor-position information through the DRIVE-CLiQ feedback arrangement. The drive uses this information to regulate motor operation according to the commanded speed, position or torque. This feedback loop helps maintain the required motion response as machine loads and operating conditions change.
The integrated Pt1000 temperature sensor provides temperature information for the drive system’s monitoring functions. When the feedback and temperature channels are configured correctly, the drive can use this information to support thermal monitoring and protective responses.
Because this motor version has no integrated holding brake, the machine must provide an appropriate method of holding a load whenever the application requires it. The drive, motor feedback, mechanical coupling and control sequence must all be configured for the intended motion task.
Role in a SIMOTICS S Servo Control Architecture
The 1FK7042-2AF71-1UA0 serves as the electromechanical actuator in a closed-loop servo system. The motion controller generates commands, the servo drive regulates motor current, and the resolver feedback supports control of the motor’s rotational position and speed.
| System Component | Function | Relationship to the Motor |
|---|---|---|
| SIMOTICS S-1FK7 Motor | Converts electrical energy into mechanical motion | Executes the commanded rotary movement |
| SINAMICS Servo Drive | Regulates motor current, speed and torque | Powers the motor and processes feedback |
| Multipole Resolver | Provides rotor-position information | Supplies feedback for closed-loop control |
| DRIVE-CLiQ Connection | Carries feedback communication | Connects the motor feedback arrangement to compatible drive equipment |
| Pt1000 Temperature Sensor | Measures motor temperature | Supports thermal monitoring |
| Motion Controller / PLC | Executes motion sequences and machine logic | Supplies motion commands to the drive |
| Mechanical Coupling | Transfers motor torque to the driven mechanism | Connects the keyed motor shaft to the machine axis |
| External Holding Mechanism, Where Required | Prevents unwanted movement when the motor is not producing torque | Provides load holding because this motor version has no integrated brake |
Industrial Applications
| Application | Motion-Control Task | Role of the Motor |
|---|---|---|
| Automated Production Machinery | Controlling rotary machine axes | Supplies servo torque and feedback for motion regulation |
| Packaging Equipment | Coordinating movement during product handling | Supports repeatable motion when correctly configured |
| Assembly Automation | Moving mechanisms between programmed positions | Provides controlled rotary actuation |
| Material Handling Systems | Driving positioning or transfer mechanisms | Supplies motion under closed-loop control |
| Machine-Building Applications | Operating servo-driven mechanisms | Provides a compact motor option for appropriately sized axes |
| Industrial Positioning Systems | Regulating shaft speed and position | Uses resolver feedback for drive control |
Installation and Maintenance
- Verify the motor reference: Confirm that 1FK7042-2AF71-1UA0 matches the required feedback, shaft and brake configuration.
- Check mechanical mounting: Confirm that the mounting flange and machine interface match the motor’s IM B5 installation arrangement.
- Verify drive compatibility: Select a compatible Siemens servo drive for the motor’s electrical ratings and DRIVE-CLiQ feedback arrangement.
- Isolate the equipment: Follow the required electrical lockout procedure and secure the driven mechanism before maintenance.
- Inspect power connections: Check the motor power connector and associated wiring for damage or contamination.
- Check resolver communication: Verify the feedback connection and confirm that the drive recognizes the resolver correctly.
- Verify temperature monitoring: Check the Pt1000 sensor connection and corresponding drive configuration.
- Inspect the keyed shaft: Check the keyway and mating coupling for damage, wear or incorrect fit.
- Confirm the brake arrangement: Remember that this motor version has no integrated holding brake; verify any external load-holding provision required by the machine.
- Check the operating environment: Ensure that the installation conditions comply with the motor’s protection rating and operating requirements.
- Perform a controlled commissioning test: Verify rotation direction, feedback response, speed regulation and temperature-monitoring operation.
- Record maintenance findings: Document the motor reference, drive configuration, feedback status and any abnormal noise, vibration or temperature readings.
Compatible System Components
| Component | Function | Compatibility Consideration |
|---|---|---|
| SINAMICS S120 Drive System | Provides servo power and closed-loop motor control | Confirm the drive configuration supports the motor’s ratings and feedback interface |
| SINAMICS Motor Module | Supplies controlled current to the motor | Select according to the required current and system configuration |
| DRIVE-CLiQ Cable | Carries feedback communication | Verify the cable and connector arrangement for the installed system |
| Motor Power Cable | Supplies electrical power to the motor | Match the connector and cable specification to the motor configuration |
| Motion Controller / PLC | Generates motion commands and sequences | Configure the controller for the selected drive and motor |
| Mechanical Coupling | Transfers torque to the driven mechanism | Match the coupling to the keyed shaft and machine requirements |
| External Holding Brake or Locking Mechanism, Where Required | Holds the mechanism when necessary | Must be selected according to the load and machine safety requirements |
Recommended Related Models
| Model | Product Type | Relationship | Selection Consideration |
|---|---|---|---|
| Siemens 1FK7042-2AF71-1RH1 | SIMOTICS S Synchronous Motor | Related 1FK7-CT motor configuration with an integrated holding brake and absolute encoder | Compare brake and feedback requirements before selecting |
| Siemens 1FK7042-2AF71-1QG0 | SIMOTICS S Synchronous Motor | Related motor configuration in the same 1FK7 family | Verify the encoder, shaft, brake and protection specifications |
| Siemens 1FK7042-2AF71-1FA0 | SIMOTICS S Synchronous Motor | Related 1FK7-CT motor with absolute encoder feedback and no holding brake | Compare encoder type and feedback requirements |
| Siemens SINAMICS S120 | Servo Drive System | Drive family used in compatible SIMOTICS S servo architectures | Verify electrical sizing and feedback compatibility for the complete system |
Key Advantages
- Provides controlled servo motion through permanent-magnet synchronous motor technology.
- Uses resolver feedback with a DRIVE-CLiQ interface for compatible closed-loop drive systems.
- Includes a Pt1000 temperature sensor for motor thermal monitoring.
- Uses natural cooling and a keyed shaft configuration.
- Offers IP64 enclosure protection.
- Provides a brake-free configuration for machines with separate load-holding arrangements or no holding-brake requirement.
Technical FAQs
What feedback device is used in the Siemens 1FK7042-2AF71-1UA0?
This motor uses a multipole resolver with a DRIVE-CLiQ interface. The feedback arrangement supplies rotor-position information to a compatible Siemens drive for closed-loop motor control.
Does the 1FK7042-2AF71-1UA0 include a holding brake?
No. This configuration is specified without an integrated holding brake. If the machine must hold a load while the motor is stationary or de-energized, an appropriate external holding mechanism may be required.
What is the purpose of the integrated Pt1000 temperature sensor?
The Pt1000 sensor measures motor temperature and supplies information for compatible drive-system monitoring. Correct wiring and parameterization are necessary for the temperature information to be used properly.
What should be checked when commissioning this motor with a SINAMICS drive?
Verify the exact motor order number, drive compatibility, power connections, resolver communication, temperature-sensor configuration and mechanical coupling. Also confirm that the machine’s load-holding requirements are met because this version has no integrated brake.