Product Overview

The Siemens 1FK7063-2AF71-1RH1 is a SIMOTICS S-1FK7-CT permanent-magnet synchronous servo motor for industrial machinery requiring controlled acceleration, repeatable positioning, and coordinated axis movement. With a rated power of 2.3 kW, a rated speed of 3,000 rpm, and a rated torque of 7.3 Nm, it is suitable for servo applications in which motion profiles change frequently throughout a production cycle.

Consider an automated assembly machine that moves workpieces between loading, fastening, and inspection stations. The motor can drive a positioning axis while a compatible SINAMICS drive regulates speed and torque using encoder feedback. This arrangement allows the controller to coordinate the axis with sensors, pneumatic actuators, and other machine functions.

The 1RH1 configuration includes a permanent-magnet holding brake and an AM20DQI absolute encoder with 20-bit single-turn and 12-bit multiturn resolution. The brake helps secure the connected mechanism when the motor is not actively driving the axis. Meanwhile, the encoder supplies absolute position information through the DRIVE-CLiQ interface, supporting feedback-based motion control.

This particular configuration also features natural cooling, a smooth shaft, rotatable power and signal connectors, and IP65 protection. When specifying a replacement, engineers should verify the brake configuration, encoder interface, shaft connection, and drive compatibility rather than relying on the basic 1FK7 family designation alone.

Technical Specifications

Product Features

• 2.3 kW rated power: Supports servo-driven machinery requiring controlled rotary motion.
• 3,000 rpm rated speed: Suits positioning axes and cyclic production movements.
• Permanent-magnet synchronous technology: Enables regulated torque and speed when paired with a compatible servo drive.
• AM20DQI absolute encoder: Supplies single-turn and multiturn position feedback through DRIVE-CLiQ.
• Integrated holding brake: Provides a 13 Nm holding torque for suitable stationary load-holding applications.
• Defined brake operating times: The specified opening and closing times can be incorporated into axis sequencing.
• Natural cooling: Uses the specified self-cooling arrangement without a separate forced-air motor cooling unit.
• IP65 protection: Protects against dust ingress and water jets under the defined test conditions.
• Smooth shaft: Supports coupling arrangements selected for the driven mechanism.
• Rotatable connectors: Allow power and signal connections to be arranged according to the installation layout.

Working Principle

The 1FK7063-2AF71-1RH1 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 SINAMICS drive controls the three-phase motor currents, adjusting the torque and speed according to commands from the motion controller.

A typical servo-axis arrangement follows this sequence:

PLC / Motion Controller → SINAMICS Drive → 1FK7063-2AF71-1RH1 → Mechanical Load

Encoder Feedback: AM20DQI → DRIVE-CLiQ → Servo Drive

When the controller requests a movement, the drive regulates motor current to accelerate the axis, maintain the commanded speed, or decelerate toward a target position. The encoder returns absolute position information so that the control system can compare actual motion with the commanded trajectory.

In a packaging machine, for example, a positioning axis may need to advance a product to a sealing station and stop at a defined position before the next operation begins. The motor supplies the required rotary motion, while the drive and controller coordinate the movement with the rest of the production sequence. Actual positioning performance depends on drive tuning, mechanical stiffness, load inertia, coupling characteristics, and the programmed motion profile.

The integrated holding brake operates separately from the motor’s torque-control function. It is intended to hold the mechanical axis when engaged, rather than provide normal dynamic braking during repeated movements. The drive’s brake-control sequence must account for the specified opening and closing times, particularly when the axis is subject to gravity or external forces.

The encoder and brake configuration also affect commissioning. The drive must recognize the correct motor and feedback system, and the brake circuit must be configured so that the brake releases before motion begins and engages at the appropriate point when the axis stops.

Role in a SINAMICS Servo Control Architecture

The 1FK7063-2AF71-1RH1 serves as the electromechanical stage of a closed-loop servo axis. The controller defines the motion sequence, the SINAMICS drive regulates motor operation, and the encoder returns position feedback. The integrated holding brake adds a mechanical holding function that must be coordinated with the drive.

Motion Controller → SINAMICS Drive → Servo Motor → Mechanical Transmission

Encoder Feedback → DRIVE-CLiQ → Servo Drive

Drive commissioning should include motor identification, encoder assignment, current limits, and brake parameters. The mechanical load and controller configuration must also be checked before the axis operates at its intended production speed.

Industrial Applications

The motor is particularly relevant where controlled motion and a defined holding-brake function are both required. Before selection, assess continuous torque, peak torque, acceleration, deceleration, duty cycle, and the inertia of the driven mechanism. Vertical or gravity-loaded axes also require a review of brake capacity and the machine’s safety strategy.

Installation and Maintenance

1. Verify the complete order number: Confirm that the motor is 1FK7063-2AF71-1RH1, including its encoder and holding-brake configuration.
2. Check drive compatibility: Ensure the selected SINAMICS drive supports the motor’s electrical ratings and AM20DQI DRIVE-CLiQ feedback system.
3. Inspect the mounting interface: Check the mounting flange, contact surface, fasteners, and alignment before installation.
4. Review the shaft coupling: Select a coupling suitable for the smooth shaft and verify alignment with the driven mechanism.
5. Connect the motor power circuit: Follow the applicable wiring diagram and verify phase connections and protective-earth continuity.
6. Inspect encoder connections: Check the DRIVE-CLiQ cable, connectors, cable routing, and drive-side feedback assignment.
7. Verify brake wiring: Confirm the 24 V DC brake supply, control circuit, and specified current requirements before commissioning.
8. Check brake timing: Account for the specified 100 ms opening time and 50 ms closing time in the axis sequence, subject to the actual control configuration.
9. Assess mechanical loading: Review load inertia, friction, coupling alignment, and expected peak torque to avoid excessive motor loading.
10. Configure the drive: Verify motor identification, encoder parameters, current limits, and brake-control settings.
11. Test under controlled conditions: Confirm rotation direction, encoder feedback, brake release, stopping behavior, and fault response before increasing operating demands.
12. Document maintenance findings: Record drive settings, encoder assignments, brake operation, coupling details, and commissioning results for future service.

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

Compatible System Components

The 1FK7063-2AF71-1RH1 requires a compatible servo drive, encoder connection, brake-control arrangement, and mechanical transmission. The selected components must support the motor’s feedback interface and the actual load requirements.

Recommended Related Models

Key Advantages

• 2.3 kW rated power and 3,000 rpm rated speed.
• 7.3 Nm rated torque at the specified thermal condition.
• AM20DQI absolute encoder with single-turn and multiturn feedback.
• Integrated 13 Nm permanent-magnet holding brake.
• DRIVE-CLiQ integration with compatible SINAMICS drive systems.
• Natural cooling and IP65 protection.
• Smooth shaft and rotatable connectors for machine integration.

Technical FAQs

What is the difference between 1FK7063-2AF71-1RH1 and 1FK7063-2AF71-1RH0?

Both models belong to the same 1FK7 motor family and include a holding brake with AM20DQI encoder feedback. The RH1 variant has an IP65 protection rating, while the RH0 configuration is specified with IP64 protection. Verify the enclosure requirements and complete configuration before selecting a replacement.

What electrical supply does the integrated holding brake require?

The permanent-magnet holding brake uses a 24 V DC supply with a specified tolerance of ±10% and a coil current of 0.8 A. The brake-control circuit must be compatible with these requirements and with the drive’s brake-control sequence.

Can the holding brake be used to stop the motor during every operating cycle?

The holding brake is intended primarily to secure the stationary axis. It should not be treated as a substitute for normal servo deceleration or as a general-purpose dynamic braking device. Repeated operational stops should be managed through the drive’s configured motion-control functions.

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

Verify that the installed motor’s full order number matches the configured motor data, then inspect the DRIVE-CLiQ connection, connector condition, encoder assignment, and drive diagnostics. A mismatch between the physical encoder configuration and the drive configuration can prevent correct feedback evaluation.