🔧 Product Overview
The Siemens 1FK7083-5AF71-1EH0 is a SIMOTICS S 1FK7 Compact synchronous servo motor designed for precision motion and industrial automation applications. It uses natural cooling and is intended for IM B5 mounting, with IM V1 and IM V3 installation positions also supported.
This model is rated at 3.30 kW with a rated speed of 3000 rpm. Its rated torque is approximately 10.5 Nm at the 100 K temperature rise condition, while the standstill torque is 16 Nm.
The motor uses an absolute EnDat encoder with 2048 P/rev and includes a permanent-magnet holding brake. The power and signal connectors can be rotated by 270°, providing additional flexibility when fitting the motor into a machine cabinet or compact mechanical assembly.
⚙️ Key Features
- Siemens SIMOTICS S 1FK7 Compact synchronous servo motor
- 3.30 kW optimum/rated application power
- 3000 rpm rated speed
- 10.5 Nm rated torque at 100 K
- 16 Nm standstill torque
- Natural air cooling
- IM B5 mounting configuration
- IM V1 / IM V3 installation positions
- Absolute EnDat 2048 P/rev encoder
- Permanent-magnet holding brake
- Plain shaft with tolerance N
- Power/signal connector position adjustable through 270°
- IP64 degree of protection
📋 Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | Siemens |
| Model | 1FK7083-5AF71-1EH0 |
| Product Family | SIMOTICS S |
| Series | 1FK7 Compact |
| Motor Type | Synchronous Servo Motor |
| Rated Speed | 3000 rpm |
| Rated Torque | 10.5 Nm at 100 K |
| Standstill Torque | 16 Nm |
| Optimum Power | 3.30 kW |
| Rated Current | Approx. 7.4 A |
| Cooling | Naturally Cooled |
| Mounting | IM B5 |
| Installation Positions | IM V1, IM V3 |
| Encoder | Absolute EnDat, 2048 P/rev |
| Holding Brake | Permanent-Magnet Brake |
| Brake Holding Torque | 22 Nm |
| Brake Supply | 24 VDC ±10% |
| Shaft | Plain Shaft, Tolerance N |
| Protection Rating | IP64 |
| Maximum Mechanical Speed | 6000 rpm |
| Maximum Torque | 50 Nm |
| Maximum Current | 37 A |
| Approx. Weight | 16.5 kg |
| Condition | Verify actual listing/nameplate condition |
⚙️ Operating Function
The 1FK7 servo motor converts controlled electrical power from a compatible Siemens motion drive into precise rotary movement. Its permanent-magnet synchronous construction provides stable torque characteristics for positioning, speed control, and coordinated machine motion.
The absolute EnDat encoder provides rotor position feedback to the drive. This is important for closed-loop positioning because the controller can continuously determine motor position and regulate speed and torque accordingly.
The integrated holding brake is primarily intended to secure the motor shaft when the motor is stopped or when the machine requires mechanical holding. Brake wiring and release logic must follow the applicable Siemens drive and machine safety design.
🛠️ Installation & Configuration
Before installation, confirm the complete MLFB number on the motor nameplate. The final characters of a Siemens 1FK7 part number define important options such as encoder, brake, shaft, and protection configuration.
Check the following before connecting the motor:
- Confirm the motor model and nameplate data.
- Verify compatibility with the selected SINAMICS drive.
- Match the encoder interface and feedback configuration.
- Confirm the motor power and signal connector arrangement.
- Check the 24 VDC brake supply specification.
- Ensure the mechanical flange and shaft dimensions match the machine.
- Maintain correct motor and encoder cable routing.
- Keep encoder cables separated from high-power switching cables where practical.
- Check grounding and shielding before commissioning.
Do not substitute another 1FK7 motor solely because the basic frame size looks similar. Encoder and brake configurations can differ between MLFB variants.
🔍 Maintenance Tips
Keep the motor housing, connectors, and mounting area clean and dry. Although IP64 provides protection against dust ingress and water splashing from specified directions, it should not be treated as protection for continuous exposure to water or high-pressure cleaning.
During scheduled maintenance, inspect:
- Motor housing and mounting flange
- Shaft and coupling condition
- Power connector
- Encoder connector
- Brake operation
- Cable insulation
- Unusual bearing noise or vibration
- Motor temperature during operation
- Encoder feedback stability
If abnormal vibration or temperature is detected, inspect the mechanical coupling and load before assuming that the motor itself has failed.
❓ Frequently Asked Questions
Q: What type of motor is the 1FK7083-5AF71-1EH0?
A: It is a Siemens SIMOTICS S 1FK7 Compact synchronous servo motor.
Q: What is its rated speed?
A: The specified rated speed is 3000 rpm.
Q: What is the motor power?
A: The specified optimum power is 3.30 kW.
Q: Does this model have a holding brake?
A: Yes. This exact MLFB includes a permanent-magnet holding brake with a specified holding torque of 22 Nm.
Q: What encoder does it use?
A: It uses an absolute EnDat encoder with 2048 P/rev according to the model configuration.
Q: Is the motor naturally cooled?
A: Yes. The 1FK7 Compact configuration is naturally cooled.
Q: What is the protection rating?
A: The specified degree of protection is IP64.
Q: Can the motor be installed in different positions?
A: Yes. The configuration supports IM B5 and the listed IM V1 / IM V3 mounting positions.
Q: Is this motor compatible with every Siemens SINAMICS drive?
A: No. Compatibility depends on the drive family, motor data, encoder interface, firmware, and configured motor parameters. The complete MLFB should be checked before replacement.
🔄 10 Related Siemens Servo Motor Models
- Siemens 1FK7083-5AF71-1EH2
- Siemens 1FK7083-5AF71-1EH3
- Siemens 1FK7083-5AF71-1EH5
- Siemens 1FK7083-5AF71-1AG0
- Siemens 1FK7083-5AF71-1DG3
- Siemens 1FK7083-5AF71-1UG5
- Siemens 1FK7063 Series Servo Motor
- Siemens 1FK7100 Series Servo Motor
- Siemens 1FK7042 Series Servo Motor
- Siemens 1FK7022 Series Servo Motor
The related models above are from the broader Siemens 1FK7/SIMOTICS S family, but encoder, brake, shaft, and protection configurations can vary. Always compare the complete MLFB before selecting a replacement.
🏭 Application Summary
The Siemens 1FK7083-5AF71-1EH0 is suitable for precision motion applications where controlled speed, positioning accuracy, and closed-loop feedback are required. Typical applications include machine tools, packaging equipment, material handling systems, automated production machinery, robotics, and other Siemens-based motion-control systems.
For replacement projects, the complete part number is more important than the motor series alone. Verify the nameplate, encoder type, brake configuration, mechanical mounting, and drive compatibility before installation.
