Product Overview

The Siemens 1FK7063-5AF71-1AH0 is a SIMOTICS S-1FK7 Compact permanent-magnet synchronous servo motor for industrial motion systems that require controlled acceleration, repeatable positioning, and mechanical holding after movement. Its 2.29 kW rated power and 3,000 rpm rated speed make it suitable for positioning axes, indexing mechanisms, and automated production equipment operating through repeated motion cycles.

Consider an automated assembly station where a fixture moves into position, remains stationary during a fastening operation, and then advances to the next station. The motor works with a compatible servo drive to regulate the movement, while its integrated holding brake helps secure the axis when the motor is no longer required to produce active torque. The controller coordinates these actions with machine sensors and the production sequence.

The 1AH0 configuration combines an incremental Sin/Cos encoder with a holding brake and a plain shaft. The encoder supplies 1 Vpp feedback signals at 2,048 pulses per revolution, so the drive and machine controller must be configured for incremental feedback. Depending on the application, a homing procedure or reference sensor may be required after startup.

The motor uses natural cooling and has power and signal connectors that can be rotated through 270 degrees. Its IP64 enclosure suits installations where protection against dust and water splashes is appropriate. When selecting a replacement, verify the encoder interface, brake wiring, shaft coupling, and drive configuration rather than matching the motor by frame size alone.

Technical Specifications

Product Features

• 2.29 kW rated output: Supports servo applications requiring controlled rotary motion.
• 3,000 rpm rated speed: Suits indexing, positioning, and repeated machine movements.
• Permanent-magnet synchronous technology: Enables regulated torque and speed when paired with a compatible servo drive.
• Incremental Sin/Cos encoder: Supplies motion feedback through 1 Vpp signals at 2,048 pulses per revolution.
• Integrated holding brake: Helps retain the connected mechanism when the brake is engaged within its specified operating limits.
• Plain shaft: Accommodates suitable couplings selected for the driven mechanism.
• Natural cooling: Uses the specified cooling arrangement without a separate forced-air motor cooling unit.
• IP64 protection: Protects against dust ingress and water splashes under the defined test conditions.
• 270° rotatable connectors: Allow the power and signal connections to be positioned to suit the installation.
• Brake and feedback integration: Supports coordinated axis movement and stationary holding when configured with compatible drive equipment.

Working Principle

The 1FK7063-5AF71-1AH0 generates rotary motion through the interaction between its permanent-magnet rotor and the magnetic field produced by the stator windings. A compatible servo drive controls the three-phase motor current to regulate torque and speed according to commands from the motion controller.

A typical servo-axis arrangement follows this path:

PLC / Motion Controller → Compatible Servo Drive → 1FK7063-5AF71-1AH0 → Mechanical Load

Incremental Encoder Feedback → Servo Drive → Closed-Loop Motion Control

When the controller requests a movement, the drive adjusts motor current to accelerate the load, maintain the commanded speed, or decelerate toward a target position. The incremental encoder supplies Sin/Cos feedback, allowing the drive to monitor motor movement and regulate the axis.

In a packaging machine, for example, the motor may advance a feed mechanism to a specific position before a cutting or sealing operation. The controller coordinates the movement with the production cycle, and the drive uses encoder feedback to regulate the motor response. Actual positioning performance depends on the feedback evaluation, drive tuning, load inertia, coupling characteristics, and mechanical stiffness.

The holding brake serves a different purpose from servo torque control. It secures the mechanical axis when engaged; it is not intended to replace normal servo deceleration during routine movement. The control sequence must coordinate brake release with the availability of motor torque and engage the brake at the appropriate point when the axis stops.

Because the encoder is incremental rather than absolute, the machine’s referencing strategy also matters. A homing movement or reference sensor may be needed to establish the axis position after startup, depending on the controller and application.

Role in a SINAMICS Servo Control Architecture

The 1FK7063-5AF71-1AH0 forms the electromechanical stage of a closed-loop servo axis. The controller coordinates machine movements, the servo drive regulates motor operation, and the encoder returns feedback. The holding brake adds a mechanical function that must be coordinated with the drive’s operating sequence.

Motion Controller → Compatible SINAMICS Drive → Servo Motor → Mechanical Transmission

Incremental Encoder Feedback → Drive Feedback Interface → Axis Control

Drive configuration must match the motor’s electrical characteristics, incremental encoder interface, and brake arrangement. When replacing a motor with an absolute encoder, the feedback hardware and referencing procedure require particular attention.

Industrial Applications

This motor is relevant to applications that require both controlled servo movement and a defined holding-brake function. Selection should account for continuous torque, peak torque, acceleration, operating frequency, load inertia, and the mechanical requirements of the axis. For gravity-loaded mechanisms, the brake and the overall machine safety arrangement must be evaluated together.

Installation and Maintenance

1. Verify the complete order number: Confirm that the installed motor is 1FK7063-5AF71-1AH0, including its incremental encoder, plain shaft, and integrated holding brake.
2. Check drive compatibility: Verify that the selected servo drive supports the motor’s electrical ratings and Sin/Cos 1 Vpp feedback interface.
3. Inspect the mounting flange: Check the mounting surface, fasteners, and alignment before securing the motor.
4. Check the plain shaft coupling: Confirm that the coupling is suitable for the shaft and that alignment does not introduce excessive mechanical stress.
5. Connect the motor power circuit: Follow the applicable wiring diagram and verify the motor connections and protective-earth continuity.
6. Inspect the encoder cable: Check the signal connector, cable routing, shielding, and drive-side feedback connection.
7. Verify the brake-control circuit: Confirm that the brake supply and control arrangement match the motor’s specified configuration.
8. Confirm brake sequencing: Ensure that the brake releases before commanded movement and engages according to the configured stopping sequence.
9. Assess the mechanical load: Review load inertia, friction, coupling alignment, and expected peak torque before commissioning.
10. Configure the drive: Verify motor identification, encoder settings, current limits, brake parameters, and control mode.
11. Test at reduced operating demand: Confirm rotation direction, encoder feedback, brake operation, and stopping behavior before running the full production motion profile.
12. Document the final configuration: Record the motor reference, drive settings, encoder interface, brake sequence, and coupling details for future maintenance.

Before servicing the motor, isolate the drive and follow the site’s electrical safety procedures. Secure any mechanism that could move under gravity or external forces before working on the holding brake. A rotating permanent-magnet motor can generate voltage when driven mechanically, so electrical hazards must be assessed before disconnecting the motor.

Compatible System Components

The 1FK7063-5AF71-1AH0 must be matched with a compatible servo drive, incremental feedback interface, brake-control circuit, and mechanical transmission. The final selection depends on the machine’s control architecture and motion requirements.

Recommended Related Models

Key Advantages

• 2.29 kW rated output and 3,000 rpm rated speed.
• 7.3 Nm rated torque at the specified thermal condition.
• Incremental Sin/Cos encoder feedback at 2,048 pulses per revolution.
• Integrated holding brake for suitable stationary load-holding applications.
• Plain shaft for compatible coupling arrangements.
• Natural cooling and IP64 protection.
• Power and signal connectors rotatable through 270°.

Technical FAQs

What is the main difference between the 1AH0 and 1AG0 configurations?

Both configurations use incremental Sin/Cos encoder feedback and a plain shaft. The 1AH0 version includes an integrated holding brake, while the 1AG0 version does not. This difference affects the brake-control wiring, drive configuration, and the machine’s method of securing the stationary axis.

Does the 1FK7063-5AF71-1AH0 provide absolute position information after power-up?

No. This configuration uses an incremental encoder with Sin/Cos 1 Vpp signals. Depending on the machine’s control architecture, a reference sensor or homing movement may be required to establish the axis position before position-dependent operations begin.

How should the integrated holding brake be coordinated with the servo drive?

The control sequence should ensure that motor torque is available as required before the brake releases and that the brake engages at the appropriate point when the axis stops. The brake is intended for holding rather than routine dynamic stopping, so normal deceleration should be handled by the servo drive.

What should be checked if the replacement motor produces an encoder fault?

Verify the complete motor reference, encoder signal type, cable condition, shielding, feedback connection, and drive configuration. If the previous motor used an absolute encoder, confirm that the controller’s referencing procedure and feedback settings are appropriate for the incremental encoder fitted to this version.