Siemens 1FK7083-2AC71-1UB1 SIMOTICS S 1FK7 Servomotor
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Product Information
The Siemens 1FK7083-2AC71-1UB1 is a permanent-magnet synchronous servomotor belonging to the SIMOTICS S 1FK7 Compact family. Engineered for high dynamic performance in automated machinery, this 80 mm shaft height unit delivers a rated output power of 3.5 kW, a rated torque of 11 Nm, and a static stall torque of 16 Nm at a nominal speed of 3000 rpm, with maximum mechanical speeds up to 6000 rpm. Construction features include natural cooling, an IP65 protection rating suited for harsh industrial environments, a standard cylindrical shaft extension with a fitted feather keyway, and an unbraked configuration without an integrated holding brake.
Connecting the motor into an active drive architecture utilizes rotatable M23 circular connectors for power and M17/RJ45 circular connectors for the DRIVE-CLiQ digital communication interface. Commissioning a replacement unit is simplified by the built-in electronic rating plate located inside the integrated AM20DQI high-resolution absolute encoder, which provides 20-bit singleturn and 12-bit multiturn positioning feedback. Upon connection to a SINAMICS S120 drive system, the controller reads the stored motor specifications automatically via DRIVE-CLiQ, bypassing manual parameterization in software tools such as STARTER or SINAMICS Startdrive in TIA Portal. Facilities swapping out a failed unit can rely on ABC Industrial Parts to supply tested replacement motors to minimize setup complexity.
System status and operation are monitored directly through the drive unit using DRIVE-CLiQ communication telemetry and encoder signal evaluation on the connected controller. Standard diagnostic checks include verifying that the rotatable M23 power and DRIVE-CLiQ signal cables are fully seated and free of damage, confirming correct drive bus operation, and checking mechanical coupling along the keyway shaft. If internal motor faults occur, such as winding breakdown or encoder failure, component repairs cannot be performed in the field; installing a replacement unit is the standard route to restore production stability.
Technical Specifications
| Manufacturer | Siemens |
| Part Number | 1FK7083-2AC71-1UB1 |
| Product Family | SIMOTICS S |
| Series | 1FK7 |
| Component Type | Servo Motor |
| Shaft Height | 80 mm |
| Rated Speed | 3000 rpm |
| Maximum Speed | 6000 rpm |
| Rated Power | 3.5 kW |
| Rated Torque | 11 Nm |
| Static Stall Torque | 16 Nm |
| Rated Current | 6.8 A |
| Stall Current | 9.3 A |
| Cooling Type | Natural cooling |
| Protection Rating | IP65 |
| Encoder Type | AM20DQI absolute encoder (20-bit singleturn / 12-bit multiturn) |
| Shaft Extension | Cylindrical shaft with fitted feather key |
| Holding Brake | Without holding brake |
Programming and Configuration
The 1FK7083-2AC71-1UB1 servomotor utilizes Siemens DRIVE-CLiQ technology for plug-and-play configuration and motion control integration. Equipping the motor with an AM20DQI absolute encoder featuring 20-bit singleturn and 12-bit multiturn feedback, the motor electronically retains its identification data, power ratings, and thermal parameters directly in its internal memory plate. When connected to engineering environments such as SINAMICS Startdrive within TIA Portal or the STARTER commissioning tool, device identification and parameter upload occur automatically.
Because the absolute encoder retains multi-turn positional information across power interruptions, machines using this motor do not require zero-point homing routines after power restoration. Replacement procedures require connecting the physical signal interface to the drive, allowing the controller to upload the internal profile, verify motor compatibility, and re-establish precise positioning coordinates immediately.
Communication and System Integration
Interfacing the 1FK7083-2AC71-1UB1 motor to control infrastructure relies on the DRIVE-CLiQ digital interface operating alongside power lines. Main motor power is supplied via a rotatable M23 circular connector, while digital feedback and electronic rating plate communications use rotatable M17/RJ45 DRIVE-CLiQ connection hardware. The rotatable connector arrangement allows flexible cable routing in constrained machine frames and cable tracks.
The motor connects directly to the SINAMICS S120 drive system, acting as an integrated axis feedback node in machine control architectures. Real-time encoder feedback over DRIVE-CLiQ delivers high positioning precision required for CNC machine tool feed axes, automated packaging equipment, and robotic transfer stages across automotive and manufacturing facilities.
Diagnostics and Status Indication
Operational feedback and diagnostic surveillance for the 1FK7083-2AC71-1UB1 are performed externally through the connected drive system. The drive controller continuously monitors encoder feedback signals and DRIVE-CLiQ communication telemetry in real time, detecting condition anomalies such as signal disruption or axis position deviation.
First-line field diagnostics include checking the physical locking of the rotatable M23 power and M17/RJ45 DRIVE-CLiQ connectors, verifying cable integrity, and monitoring current draw on the drive controller relative to the motor's rated 6.8 A current and 9.3 A stall current parameters.
Replacement and Spare Part Considerations
When selecting a spare motor for an existing installation, exact configuration matching is essential. The 1FK7083-2AC71-1UB1 features an 80 mm frame size, standard cylindrical shaft with keyway, 3.5 kW power rating, and no internal holding brake. Substituting a variant with a smooth shaft, integrated brake, or alternative encoder interface will result in mechanical incompatibility or drive configuration errors.
Although the SIMOTICS S 1FK7 series is in phase-out status, replacing a damaged motor with the exact part number 1FK7083-2AC71-1UB1 eliminates the need for mechanical redesign or drive topology modifications. ABC Industrial Parts offers verified replacement units to maintain existing automation infrastructure and ensure long-term operational continuity.
Frequently Asked Questions
What is the function of the DRIVE-CLiQ interface on the 1FK7083-2AC71-1UB1?
The DRIVE-CLiQ interface transfers encoder positioning signals and electronic rating plate data digitally to the connected SINAMICS S120 drive system, enabling automatic motor parameterization and identification.
Does the 1FK7083-2AC71-1UB1 motor require homing after a power loss?
No. The integrated AM20DQI absolute encoder features 20-bit singleturn and 12-bit multiturn resolution, retaining absolute position data across power cycles without requiring homing routines.
Does this servomotor variant include an integrated holding brake?
No, the 1FK7083-2AC71-1UB1 variant is configured without an integrated mechanical holding brake.
Which drive systems and software tools support this motor?
The motor integrates with the SINAMICS S120 drive system and is supported in software environments including SINAMICS Startdrive in TIA Portal and the STARTER commissioning tool.
What shaft and connection features are present on this unit?
The motor features an 80 mm shaft height frame, a standard cylindrical shaft extension with a fitted feather keyway, and rotatable M23 power and M17/RJ45 DRIVE-CLiQ circular connectors.
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Disclaimer:
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