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- Siemens
- 1FK7042-5AF71-1UA0
- Synchronous Servo Motor
- Germany
- 48 mm
- 4.903 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Siemens 1FK7042-5AF71-1UA0 is a SIMOTICS S-1FK7 compact synchronous servo motor intended for industrial motion-control systems. Its permanent-magnet motor technology supports controlled rotary motion in applications that require repeatable positioning, regulated speed and coordinated machine movement.
The motor has a rated power of 0.82 kW and a rated speed of 3,000 rpm, with a rated torque of 3.0 Nm at a 100 K temperature rise. Natural cooling eliminates the need for an integrated forced-ventilation arrangement, while the IM B5 mounting format supports installation in compatible machine assemblies. The power and signal connectors can be rotated to accommodate different cable-routing arrangements.
Typical applications include machine-feed mechanisms, automated assembly equipment, packaging machinery and compact positioning axes. Final integration depends on matching the motor’s electrical characteristics, feedback configuration and mechanical interface to the selected servo drive and machine transmission.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Order Number | 1FK7042-5AF71-1UA0 |
| Product Family | SIMOTICS S-1FK7 |
| Product Type | Synchronous Servo Motor |
| Motor Design | Compact permanent-magnet synchronous motor |
| Rated Power | 0.82 kW |
| Rated Speed | 3,000 rpm |
| Rated Torque at 100 K Temperature Rise | 3.0 Nm |
| Cooling Method | Natural cooling |
| Mounting Arrangement | IM B5 (IM V1, IM V3) |
| Power and Signal Connectors | Rotatable by 270° |
| Motor Frame Size | 48 |
| Shaft Height | 48 mm |
| Weight | 4.903 kg |
Product Features
- Permanent-magnet synchronous technology: Supports controlled torque and speed in servo-driven machinery.
- Compact motor format: Suits machine axes that require a compact electromechanical drive.
- Rated speed of 3,000 rpm: Supports applications requiring controlled rotary movement at industrial operating speeds.
- Rated torque of 3.0 Nm: Provides a defined torque rating for axis sizing and drive selection under the specified temperature-rise condition.
- Natural cooling: Uses natural heat dissipation without an integrated forced-ventilation system.
- IM B5 mounting arrangement: Supports installation in compatible flange-mounted machine assemblies.
- Rotatable connectors: Allows the power and signal connector orientation to be adjusted to suit cable routing.
- Servo-drive integration: Can operate in a compatible closed-loop motion-control system when the drive configuration matches the motor.
- Industrial motion capability: Suitable for positioning and feed mechanisms where the motor’s rated performance meets the application requirements.
Working Principle
The motor converts electrical energy into rotary mechanical motion through the interaction between the stator’s magnetic field and the rotor’s permanent magnets. A compatible servo drive supplies controlled three-phase current to the stator windings, regulating motor torque and speed in response to commands from the motion controller.
During operation, the drive adjusts its output according to the commanded motion profile and the feedback signals supported by the complete motor-drive configuration. This control approach allows the motor to accelerate, decelerate and maintain a target speed or position as required by the machine sequence.
Correct motor identification and parameterization are essential during commissioning. The selected drive must use the appropriate motor data and compatible feedback configuration. Current limits, acceleration settings and thermal conditions should also be considered when the motor is applied to repeated positioning cycles or changing mechanical loads.
Role in a SIMOTICS S-1FK7 Servo Control Architecture
The 1FK7042-5AF71-1UA0 functions as the rotary actuator in a servo-controlled machine axis. The motion controller generates positioning or speed commands, the servo drive regulates motor power, and the associated feedback arrangement supports the control functions available in the configured system.
| System Component | Function | Relationship to the Motor |
|---|---|---|
| Siemens SINAMICS Servo Drive | Regulates motor current, torque and speed | Supplies the motor’s controlled electrical power |
| Motion Controller or PLC | Executes machine sequences and motion commands | Sends control commands to the servo drive |
| 1FK7042-5AF71-1UA0 | Converts electrical energy into rotary motion | Drives the connected machine mechanism |
| Motor Power Cable | Transfers electrical power | Connects the servo drive to the motor |
| Signal or Feedback Cable | Carries applicable motor signals | Connects the motor to the compatible drive interface |
| Mechanical Coupling | Transfers torque to the driven assembly | Connects the motor shaft to the machine transmission |
| Gearbox, Where Required | Adapts speed and output torque | Matches motor movement to the mechanical load |
| Machine HMI | Displays operating values and alarms | Presents system information processed by the controller |
| Electrical Protection Devices | Support electrical isolation and circuit protection | Form part of the complete servo-axis installation |
| Machine Frame | Supports the motor and connected mechanism | Maintains the required mechanical mounting arrangement |
Industrial Applications
| Application | Motion Requirement | Role of the Motor |
|---|---|---|
| Packaging Machinery | Repeatable movement and coordinated machine cycles | Drives compatible rotary mechanisms and positioning axes |
| Machine Tool Feed Systems | Controlled feed motion during machining operations | Supplies rotary motion to a suitable feed mechanism |
| Automated Assembly | Accurate movement between programmed positions | Drives compatible assembly and positioning equipment |
| Pick-and-Place Machinery | Controlled acceleration, deceleration and positioning | Acts as the rotary actuator for a suitable machine axis |
| Material Handling Equipment | Regulated movement of machine components | Drives mechanisms requiring controlled speed or position |
| Inspection Equipment | Repeatable fixture or component positioning | Supports controlled movement during inspection sequences |
| Compact Production Machinery | Servo motion within constrained machine layouts | Provides a compact drive option when its ratings meet the load requirements |
| Industrial Indexing Systems | Repeated rotary movement according to a programmed cycle | Drives a compatible indexing mechanism through an appropriate transmission |
Installation and Maintenance
- Verify the complete order number: Confirm that 1FK7042-5AF71-1UA0 matches the required motor configuration before installation or replacement.
- Check servo-drive compatibility: Ensure that the selected drive supports the motor’s electrical ratings and applicable signal or feedback interface.
- Isolate electrical power: Follow the machine’s electrical safety and lockout procedures before wiring, installation or maintenance.
- Inspect the mounting interface: Check the flange, mounting surface and fasteners for damage, contamination or mechanical irregularities.
- Check shaft alignment: Align the motor shaft with the connected coupling or transmission to limit excessive radial and axial loading.
- Verify the mechanical connection: Select a coupling or transmission compatible with the shaft configuration and application torque.
- Inspect the power connector: Check connector condition, pin assignments and cable compatibility before applying power.
- Route signal cables appropriately: Keep signal wiring arranged according to the installation requirements and separate it from interference sources where necessary.
- Enter the correct motor data: Configure the servo drive with the motor identification and electrical parameters applicable to this exact order number.
- Set operating limits: Configure speed, current, torque and acceleration limits to suit the machine load and operating cycle.
- Perform a controlled commissioning test: Verify direction of rotation, drive response, motion behavior and diagnostic status at a safe operating condition.
- Monitor operating trends: Investigate unusual noise, vibration, temperature changes or recurring drive alarms, and document maintenance findings.
Related Components
| Component | Function | Relationship to the Motor |
|---|---|---|
| Siemens SINAMICS Servo Drive | Provides controlled motor power | Must match the motor’s electrical and signal requirements |
| Siemens SIMOTION Motion Controller | Executes coordinated motion tasks | Can command compatible servo axes |
| SIMATIC S7-1500T CPU | Provides PLC and technology functions | Can coordinate suitable motion-control applications |
| Motor Power Cable | Transfers electrical power | Connects the drive output to the motor |
| Signal or Feedback Cable | Carries applicable motor signals | Supports the configured drive interface |
| Mechanical Shaft Coupling | Transfers torque | Connects the motor to the driven mechanism |
| Precision Gearbox | Adapts speed and torque | Used when the machine requires a transmission ratio |
| Machine HMI | Displays machine status and alarms | Supports operator monitoring |
| Electrical Protection Devices | Provide circuit protection and isolation | Support safe integration of the motor-drive system |
Recommended Related Models
| Model | Product Type | Relationship | Selection Consideration |
|---|---|---|---|
| Siemens 1FK7042-5AF71-1UA0 | SIMOTICS S Synchronous Servo Motor | Main product | Match the complete order number to the installed motor configuration |
| Siemens 1FK7042-5AF71-1SA0 | SIMOTICS S Synchronous Servo Motor | Related 1FK7 variant | Check the resolver, fitted-key shaft and brake configuration before substitution |
| Siemens 1FK7042-5AF71-1SG0 | SIMOTICS S Synchronous Servo Motor | Related 1FK7 variant | Compare the resolver configuration and plain-shaft arrangement |
| Siemens 1FK7042-5AF71-1SH0 | SIMOTICS S Synchronous Servo Motor | Related 1FK7 variant | Verify the integrated holding-brake requirement and feedback configuration |
| Siemens 1FK7042-5AF71-1EG3 | SIMOTICS S Synchronous Servo Motor | Related feedback variant | Uses an EnDat absolute encoder; check drive-interface compatibility |
| Siemens 1FK7042-2AF71-1QG0 | SIMOTICS S-1FK7 Synchronous Motor | Related motor family option | Compare the complete motor configuration and electrical requirements before selection |
Key Advantages
- Supports controlled rotary motion in compact industrial servo axes.
- Offers a rated power of 0.82 kW and rated torque of 3.0 Nm under the specified temperature-rise condition.
- Uses natural cooling for applications that do not require an integrated motor fan.
- Provides a flange-mounted arrangement for compatible machine assemblies.
- Allows connector orientation adjustment to accommodate installation and cable-routing requirements.
Technical FAQs
What should be considered when selecting a servo drive for the 1FK7042-5AF71-1UA0?
The drive must match the motor’s rated electrical characteristics, required speed and torque, and applicable signal or feedback interface. The controller and drive configuration should also support the machine’s positioning profile and duty cycle.
Is the motor suitable for repeated start-stop positioning cycles?
It may be suitable when the load, acceleration, braking profile and duty cycle remain within the motor and drive ratings. The application should be evaluated for peak torque, RMS torque, thermal loading and required positioning performance before final selection.
Why do the power and signal connectors need to be considered during installation?
Connector orientation affects cable routing, clearance and accessibility around the motor. The cables must be compatible with the connectors and installed without excessive bending, tension or interference with moving machine parts.
What should be checked before replacing an existing 1FK7 servo motor with this model?
Compare the complete order numbers, mounting arrangement, shaft and coupling requirements, rated performance, brake configuration where applicable, and the drive’s supported signal or feedback interface. Similar motor-family names alone do not establish direct interchangeability.