1FK7100-2AC71-1CB0

What type of motor is this?

It is a compact permanent-magnet synchronous servo motor from the SIMOTICS S-1FK7 range, designed for dynamic motion control applications requiring precise speed and position performance.

What are the rated speed and rated torque?

Rated speed is 2,000 rpm (at 100 K) and rated torque is 14.5 Nm (at 100 K). The optimum operating point is also specified at 2,000 rpm with an optimum power of 3.0 kW.

What maximum speed can it run at?

The maximum permissible mechanical speed is 5,000 rpm. The maximum permissible speed when operated from an inverter is 4,200 rpm.

Does it include a holding brake, and what are the brake details?

Yes, it is supplied with a permanent-magnet holding brake. Holding torque is 23.0 Nm, brake supply is DC 24 V ±10%, coil current is 1.0 A, opening time is 300 ms, closing time is 70 ms, and the highest braking work is 3,380 J.

What encoder is fitted and what feedback does it provide?

It uses an AM24DQI absolute encoder: 24-bit singleturn (resolution 16,777,216; encoder-internal 2048 S/R) plus 12-bit multiturn with a traversing range of 4,096 revolutions.

What is the degree of protection (IP rating)?

The motor has an IP64 degree of protection.

What cooling method does it use?

Cooling is by natural cooling (self-ventilation), meaning there is no external fan specified in the motor data.

What is the mounting / construction type?

The construction type is IM B5 (also noted as IM V1 / IM V3 in the same design family), which is commonly used for flange-mounted installations.

What temperature monitoring is included?

A Pt1000 temperature sensor is integrated for temperature monitoring.

What are the rated current and maximum current values?

Rated current is 7.1 A. Maximum current is 28.0 A. Stall current is specified as 6.80 A (60 K) and 8.40 A (100 K).

What are the torque limits for short-term peak operation?

Maximum torque is specified as 55.0 Nm. A recommended motor module reference lists a maximum torque capability of 53.40 Nm depending on the drive selection.

What are the key electrical constants useful for drive sizing?

Torque constant is 2.14 Nm/A. Voltage constant at 20°C is 138.0 V per 1000 min⁻¹. Winding resistance at 20°C is 0.55 Ω and rotating field inductance is 12.7 mH. Electrical time constant is 23.00 ms.

What is the rotor inertia and motor weight?

Moment of inertia is 62.000 kgcm² and the net motor weight is 21.0 kg.

What shaft end arrangement is specified?

The shaft end is specified with a feather key (keyed shaft).

What connector arrangement is used for power and signals?

It uses plug-in connectors for signals and power, and the connectors are rotatable to help accommodate cable routing in tighter machine layouts.

What mechanical accuracy and vibration grade are specified?

Radial runout tolerance is 0.050 mm, concentricity tolerance is 0.10 mm, axial runout tolerance is 0.10 mm, and vibration severity grade is Grade A.

What is the shaft height / frame reference size?

The shaft height is 100, which is the key mechanical size reference for this motor variant.

What housing colour is typical, and are there variants?

The standard housing colour is Anthracite RAL 7016. A special paint finish variant exists as Jet black, matt RAL 9005 (often indicated via an X01 special design on the ordering data).

Is this motor suitable for applications needing high efficiency?

Efficiency is specified at 92.0%, supporting applications where reduced losses and improved thermal behaviour are important. For reference, these values apply to the motor variant Siemens 1FK7100-2AC71-1CB0.