Product Description

AM8121-1F21-0000 is a high-performance DC powered servo motor. Beckhoff has equipped it with an 18-bit multi turn encoder with OCT technology. This accurate sensor provides accurate real-time feedback for the motor controller which enables precise control of motor speed and position. The AM8121-1F21-0000 has a 54 millimeter flange for machine mounting. The shaft includes a groove and feature key and is DIN 6885 compliant. Voltage rating of the holding brake installed on the unit is 24 Volts DC. Its holding torque is 2 Nm, the power draw is 10 Watts and the current draw is 0.3 Amps. Release time for the brake is 25 milliseconds and its application delay is 8 milliseconds. The aluminum housing is IP54 compliant. A power coat is applied to the motor housing for added protection.

The AM8121-1F21-0000 is a 6 pole motor. The static friction torque is 0.002 Nm. Thermal time constant of the motor is 10 minutes. The total weight, including the brake, is 1.16 kilograms. The rotor moment of inertia is 0.204 kg cm2. Specified values for standstill torque and current are 0.5 Nm and 4 Amps respectively. The motor’s maximum mechanical speed is 12,000 RPM. The nominal input voltage range is 24 to 48 Volts and the maximum input the motor can handle is 50 Volts DC. Windings on the motor have a resistance of 1.6 Ohms and their inductance is 2.8 millihenry. Performance specifications for 24 Volts DC power input include 1000 RPM speed, 0.5 Nm output torque and 52 Watts output power. Performance specifications for 48 Volts DC power input include 3000 RPM speed, 0.5 Nm output torque and 157 Watts output power.