Siemens 1FK7062-2AC71-1QB0 SIMOTICS S 1FK7-CT 1.5kW 8.5Nm 2000rpm Brake Servo Motor

The Siemens 1FK7062-2AC71-1QB0 is a SIMOTICS S 1FK7-CT synchronous servo motor rated 1.5 kW, 8.5 Nm standstill torque (M0, 100K), and 2000 rpm rated speed at 600 VDC bus voltage. It is naturally cooled, IMB5-mounted, and fitted with a DRIVE-CLiQ absolute single-turn 20-bit encoder (AS20DQI); this order number adds a holding brake, raising the moment of inertia to 12.200 kgcm².

Technical Specifications

Selection Notes

This 1FK7062-2AC71 winding pairs the lowest-speed 2000 rpm option in the 1FK7062 frame with a holding brake, for vertical or unbalanced low-speed, high-torque axes. The brake raises moment of inertia to 12.200 kgcm² and total weight to 10.5 kg over the brake-less build in this winding, and lowers shaft torsional stiffness to 26,500 Nm/rad. The 2.83 Nm/A torque constant and 2.6 A rated current for 8.5 Nm standstill torque carry over unchanged from the brake-less version. The 35-minute thermal time constant and 1.51 ms mechanical time constant are both verified for this winding, relevant for duty-cycle sizing on repetitive low-speed, high-torque moves that must also hold position under the brake.

Applications

Natural (fan-less) cooling and IP64 protection suit compact machine enclosures without forced airflow. The DRIVE-CLiQ interface connects directly to SINAMICS S120/S210 drive systems over a single feedback cable. The 2000 rpm, 8.5 Nm winding with holding brake fits vertical or unbalanced low-speed, high-torque axes such as lift and clamp stations.