Product Overview

The Siemens 1FK7063-5AF71-1EG0 is a SIMOTICS S-1FK7 Compact permanent-magnet synchronous servo motor used in industrial motion systems that require controlled speed, repeatable positioning, and coordinated axis movement. With a rated power of 2.29 kW, a rated speed of 3,000 rpm, and a rated torque of 7.3 Nm at the specified thermal condition, it suits automated machinery operating through repeated acceleration, travel, and deceleration cycles.

In a packaging or assembly machine, the motor can drive a feed mechanism, rotary positioning axis, or transfer unit that must move components through a defined sequence. A compatible servo drive regulates the motor current and speed, while the encoder supplies position feedback for closed-loop control. This arrangement allows the motion controller to coordinate the axis with sensors, grippers, and other machine functions.

The 1EG0 configuration uses an absolute encoder with EnDat feedback, a plain shaft, and no integrated holding brake. The absolute encoder supplies position information without relying solely on incremental movement counts, which can simplify position recovery after power interruptions when the complete drive system supports the encoder’s absolute-position functionality. The drive and controller must nevertheless be configured for the correct encoder interface and reference behavior.

The motor uses natural cooling, has rotatable power and signal connectors, and carries an IP64 protection rating. When replacing an existing unit, engineers should check the EnDat interface, motor identification, shaft coupling, and drive compatibility. A motor from the same 1FK7 family is not automatically interchangeable if its encoder, shaft, or brake configuration differs.

Technical Specifications

Product Features

• 2.29 kW rated output: Supports servo-driven machinery requiring controlled mechanical power.
• 3,000 rpm rated speed: Suitable for positioning and cyclic motion within the motor’s operating limits.
• 7.3 Nm rated torque: Defines the specified rated torque at the stated thermal condition.
• Absolute encoder feedback: Uses a 2,048 S/R encoder with an EnDat interface.
• Plain shaft: Accommodates compatible couplings selected for the driven mechanism.
• No integrated holding brake: Keeps the motor configuration distinct from variants with a factory-installed brake.
• 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: Helps accommodate installation-specific power and signal cable routing.
• Winding temperature monitoring: The KTY84 sensor supports motor temperature monitoring through compatible drive equipment.

Working Principle

The 1FK7063-5AF71-1EG0 converts electrical energy into rotary motion through the interaction between its permanent-magnet rotor and the magnetic field generated by the stator windings. A compatible servo drive regulates the three-phase motor current to control torque and speed in response to commands from the motion controller.

A typical servo-axis arrangement follows this sequence:

PLC / Motion Controller → Compatible SINAMICS Drive → 1FK7063-5AF71-1EG0 → Mechanical Load

Absolute Encoder → EnDat Feedback Interface → Servo Drive

When the controller requests movement, the drive adjusts motor current to accelerate the load, maintain the commanded speed, or decelerate toward the target position. The encoder supplies absolute position information through the EnDat interface, allowing compatible drive equipment to determine the rotor position and regulate the commanded movement.

For example, a machine may need to position a fixture at several stations without performing a full homing movement after every power cycle. An absolute encoder can support position recovery when the encoder, drive, and controller are configured to use the retained absolute-position information. The machine’s safety and reference requirements must still be handled by the overall control system.

The plain shaft transfers torque through a suitable coupling. Correct alignment and load assessment are essential because excessive radial loading, shaft misalignment, or an unsuitable coupling can affect bearing life and positioning performance.

This variant does not include an integrated holding brake. If the driven mechanism must remain stationary after the drive removes motor torque, the machine may need a separate mechanical holding arrangement. This is particularly important for vertical axes or loads that can move under gravity.

Role in a SINAMICS Servo Control Architecture

The 1FK7063-5AF71-1EG0 serves as the electromechanical output stage of a closed-loop servo axis. The motion controller defines the required movement, the servo drive regulates motor operation, and the absolute encoder supplies position feedback through the EnDat interface.

Motion Controller → SINAMICS Drive → Servo Motor → Mechanical Transmission

Absolute Encoder → EnDat → Drive Feedback Processing

During commissioning, verify the motor identification, encoder interface, feedback assignment, and drive parameters. If the application requires stationary load holding, confirm that the machine has an appropriate holding mechanism because this motor version has no integrated brake.

Industrial Applications

The absolute encoder configuration is useful where the machine benefits from position information available directly from the encoder rather than relying exclusively on incremental counts. Application suitability still depends on the control system, required positioning performance, load inertia, duty cycle, and mechanical transmission.

Installation and Maintenance

1. Verify the complete order number: Confirm that the motor is 1FK7063-5AF71-1EG0 and that its absolute encoder, plain shaft, and no-brake configuration match the application.
2. Check drive compatibility: Verify that the selected servo drive supports the motor’s electrical ratings and EnDat encoder interface.
3. Inspect the mounting interface: Check the mounting surface, fasteners, and alignment before securing the motor.
4. Check the plain shaft coupling: Confirm that the coupling matches the shaft and driven mechanism and 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 EnDat feedback connection: Check the encoder connector, cable routing, shielding, and drive-side feedback assignment.
7. Verify temperature monitoring: Confirm that the winding temperature sensor is correctly connected and recognized by the compatible drive system.
8. Assess the mechanical load: Review load inertia, friction, acceleration requirements, and expected peak torque before commissioning.
9. Configure the drive: Verify motor identification, encoder parameters, current limits, and control mode against the installed configuration.
10. Check the position-reference behavior: Confirm how the drive and controller establish and validate absolute position after startup or a fault.
11. Test at reduced operating demand: Check rotation direction, feedback operation, acceleration, stopping behavior, and position consistency before returning to full production.
12. Document maintenance findings: Record motor identification, drive settings, encoder assignment, cable details, and coupling information for future service.

Before servicing the motor, isolate the drive and follow the site’s electrical safety procedures. 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 1FK7063-5AF71-1EG0 requires compatible servo drive equipment, EnDat feedback connections, motor power cabling, and a suitable mechanical transmission. Component selection must reflect the existing drive architecture and the motion requirements of the machine.

Recommended Related Models

Key Advantages

• 2.29 kW rated power and 3,000 rpm rated speed.
• 7.3 Nm rated torque at the specified thermal condition.
• Absolute encoder with EnDat feedback.
• Plain shaft for compatible mechanical couplings.
• Natural cooling and IP64 protection.
• Rotatable power and signal connectors.
• Winding temperature monitoring through a KTY84 sensor.
• Suitable for servo applications that do not require an integrated motor holding brake.

Technical FAQs

What is the difference between the 1EG0 and 1AG0 configurations?

The 1EG0 version uses an absolute encoder with an EnDat interface, while the 1AG0 configuration uses incremental feedback. This affects the drive’s encoder assignment and how the control system establishes position. Confirm the feedback hardware and controller configuration before substituting one version for the other.

Does the 1FK7063-5AF71-1EG0 include a holding brake?

No. This configuration does not have an integrated holding brake. If the connected mechanism must remain stationary when motor torque is removed, assess whether a separate holding device is required.

Can the absolute encoder eliminate the need for a homing movement?

It can support position recovery without a conventional homing movement when the encoder, drive, and controller are configured to use absolute-position information correctly. The actual startup procedure depends on the machine’s control architecture and reference requirements.

What should be checked if the drive cannot read the absolute encoder?

Inspect the EnDat cable and connectors, verify the encoder assignment and motor identification, and review the drive’s diagnostic messages. Also confirm that the selected drive supports the installed encoder interface and that the feedback parameters match the motor configuration.