Technical Specifications

FAQ

1. What are the rated speed and rated torque of 1FK7101-2AC71-1BG1?

The 1FK7101-2AC71-1BG1 has a rated speed of 2000 rpm and a rated torque of 20.5 Nm. Its static torque is 22.5 Nm at a 60 K temperature rise and 27 Nm at a 100 K temperature rise. The motor is designed for servo applications requiring controlled acceleration, accurate positioning, and stable continuous operation. When selecting the motor for a machine, the continuous load torque, peak load, acceleration profile, and load inertia should be considered together to ensure that the motor operates within its specified performance range.

2. What type of encoder is used by 1FK7101-2AC71-1BG1?

This configuration uses a 24-bit absolute single-turn encoder with a Drive-CLiQ interface. The encoder provides high-resolution rotor position feedback to the SINAMICS drive, allowing the control system to accurately determine motor position during operation and commissioning. When installing or replacing the motor, the encoder connection and Drive-CLiQ communication should be checked carefully. Incorrect encoder configuration, damaged cables, or communication problems can cause drive alarms or incorrect motor positioning.

3. Which Siemens servo drive is suitable for 1FK7101-2AC71-1BG1?

The motor is designed for use with Siemens SINAMICS motion-control systems. The motor data should be correctly entered or identified in the drive, including rated speed, torque, current, encoder configuration, and motor identification data. The final drive selection should also take the machine load, peak torque requirements, acceleration profile, and available DC-link voltage into account. Correct drive sizing helps ensure stable operation and prevents unnecessary overload conditions.

4. Does 1FK7101-2AC71-1BG1 have a holding brake?

The 1FK7101-2AC71-1BG1 configuration is supplied without a holding brake. This is important when the motor is used for vertical axes or applications where a load must remain mechanically secured after the motor is switched off. A servo motor without a holding brake should not be relied upon to maintain a stationary load after power removal. If the machine requires load holding, an appropriate external mechanical braking or safety mechanism should be incorporated into the machine design.

5. What cooling method does 1FK7101-2AC71-1BG1 use?

The motor uses natural cooling. Heat produced during operation is dissipated through the motor housing into the surrounding environment without requiring a separate external cooling fan under normal operating conditions. The motor should therefore be installed where sufficient airflow and heat dissipation are available. In applications involving continuous high torque, frequent acceleration and deceleration, or elevated ambient temperatures, the operating duty cycle should be checked carefully to prevent excessive thermal loading.

6. What mounting arrangements are supported by 1FK7101-2AC71-1BG1?

The motor supports IM B5 flange mounting and can also be installed in IM V1 and IM V3 arrangements. Proper mechanical alignment is important during installation because incorrect alignment can increase shaft loading, vibration, and bearing stress. The coupling between the motor shaft and driven machine should be correctly aligned, and the mechanical load should remain within the permissible radial and axial load limits. The mounting surface should also be rigid and properly prepared before the motor is secured.

7. How should an encoder or Drive-CLiQ communication fault be diagnosed?

If the servo drive reports an encoder or Drive-CLiQ communication fault, first inspect the encoder cable and connectors for loose connections, damaged conductors, contamination, or mechanical stress. The Drive-CLiQ connection should then be checked for correct routing and secure connection. The motor identification and encoder configuration in the SINAMICS system should also be verified. If the wiring is correct but the fault remains, the encoder communication path and associated drive hardware should be tested systematically. Reviewing the drive diagnostic code can help determine whether the problem is related to the encoder, cable, connector, configuration, or communication interface.

8. What should be checked when replacing 1FK7101-2AC71-1BG1?

Before replacing the motor, the complete order number should be checked because different 1FK7 configurations can have different encoder systems, shaft designs, brake configurations, and electrical characteristics. For 1FK7101-2AC71-1BG1, particular attention should be given to the 4.3 kW rating, 2000 rpm rated speed, 20.5 Nm rated torque, 24-bit absolute single-turn encoder with Drive-CLiQ, plain shaft, natural cooling, IP65 protection, and no holding brake. After installation, the motor identification data and Drive-CLiQ communication should be verified. A controlled commissioning sequence should then be performed, beginning with low-speed operation and gradually increasing the load while monitoring current, torque, feedback, and temperature.