Product Description:

The S7720A-NAF2-NA drive is supplied by Kollmorgen within the S700 Servo Drives series. It converts three-phase AC mains into controlled current and voltage for closed-loop motor control, allowing accurate positioning and speed regulation in discrete manufacturing and continuous-process lines. Regenerative energy handling and integrated safety interfaces make the unit a compact core component for multi-axis automation platforms. Its control architecture suits servo systems that need stable dynamic response during frequent starts, stops, and speed changes.

This model operates on an input range of 208 to 480 V and can deliver a rated output of 72 Arms to the motor phases. An internal inverter clock of 8 kHz shapes the output current, and the output-current form factor of 1.01 keeps the waveform close to sinusoidal to help limit motor heating. During fast deceleration, the internal brake stage can divert up to 50 kW of pulse energy at 400 V, while continuous absorption is limited to 8 kW. Residual voltage drop across the power stage is 6 V, quiescent heat dissipation is 24 W when idling, and a 5-second peak window allows current above the nominal value for short intervals. Line noise remains below 68 dB(A) at full load, and the short overload capability helps the axis absorb brief demand spikes during acceleration.

Mechanical integration is supported by a coldplate base, coated PCBs for harsher atmospheres, and a fan-controller expansion card that supervises enclosure airflow. Dual-channel STO meets functional safety stop requirements without contactors, and an external brake resistor of 10 ohms can be added when additional braking capacity is needed. The housing measures 386 mm high, 190 mm wide, and 244 mm deep without connectors, and the unit weighs 13 kg. The coated boards and managed airflow help the drive operate reliably in enclosed cabinets where dust, humidity, or process vapors may be present.