1FK7042-2AF71-1RH0 Siemens

Description

The SIMOTICS S-1FK7 motor model 1FK7042-2AF71-1RH0 is a high-quality, compact permanent-magnet synchronous servo motor engineered for precision motion control in industrial automation. It provides efficient operation, reliable feedback, and robust construction suited for demanding applications such as robotics, CNC systems, material handling, and automated machinery.

Performance Data

• Rated speed: 3,000 rpm

• Rated torque: 2.6 Nm

• Rated current: 2.0 A

• Static torque: up to 3.0 Nm

• Stall current: up to 2.2 A

• Efficiency: 89%

• Moment of inertia: 3.200 kg·cm²

These parameters support stable torque output, smooth control, and fast response.

Electrical Characteristics

• Torque constant: 1.38 Nm/A

• Voltage constant: 90 V per 1000 rpm

• Winding resistance: 4.67 Ω

• Inductance: 35.0 mH

• Time constants:

  • Electrical: 7.50 ms

  • Mechanical: 2.15 ms

  • Thermal: 30 min

These values enable precise current control and efficient energy usage.

Mechanical Features

• Motor type: Permanent-magnet synchronous, Compact series

• Cooling: Natural cooling

• Shaft type: Smooth (plain shaft)

• Protection class: IP64

• Shaft height: 48 mm

• Vibration severity grade: Grade A

• Weight: 5.3 kg

• Mounting: IM B5 (also suitable for IM V1, IM V3)

High mechanical precision ensures reliable long-term operation.

Encoder System

The motor uses an AM20DQI absolute encoder, offering:

• 20-bit single-turn resolution (1,048,576 steps)

• 12-bit multi-turn capability (4096 revolutions)

• Internal 512 S/R

This provides extremely accurate positioning data for servo control.

Holding Brake

• Type: Permanent-magnet holding brake

• Holding torque: 4.0 Nm

• Voltage: 24 V DC

• Coil current: 0.5 A

• Opening time: 70 ms

• Closing time: 30 ms

Operating Limits

• Max mechanical speed: 9,000 rpm

• Max inverter speed: 6,400 rpm

• Maximum torque: 10.5 Nm

• Maximum current: 7.6 A

Recommended Inverter Module

• Rated inverter current: 3 A

• Max inverter current: 9 A