Product Description:

The S7720F-NAF2-S4 is a servo amplifier produced by Kollmorgen within the S700 Servo Drives series. By converting line power into a controlled three-phase output, it forms the interface between a motion controller and a servomotor, providing tightly regulated speed and torque for axes used in packaging machines, robotics, and machining centers. This drive accepts a wide mains range and supports external braking hardware, making it suitable for both continuous and highly dynamic duty cycles.

At its continuous rating the drive delivers 72 Arms to the motor, while peak demand can reach 140 Arms for fast indexing. The supply section handles up to 50 kVA from a 208…480 V three-phase mains source. An IGBT bridge switches at 8 kHz, balancing low ripple with acceptable losses. The 6 V residual drop along the power path limits heat buildup, and the unit can be cycled on or off 30 times per hour to match batch processes. A plug-in fan-controller expansion card monitors airflow so rated currents are maintained in warm enclosures.

Protective and mechanical parameters complement the electrical profile described above. The incoming AC line is safeguarded by an 80 A semiconductor fuse, and excess kinetic energy can be dissipated through a matched 10 Ohm braking resistor that the drive can energize up to 8 kW. Dual-channel STO circuitry removes gate drive in milliseconds, providing a SIL-rated safe torque-off function without mechanical relays. Standard or conformally-coated PCBs can be specified to match the plant environment. With connectors installed the housing measures 505 mm in height, 190 mm in width, and 285 mm in depth, yet it weighs only 13 kg, easing panel mounting. Overall, these features allow the product classification to align directly with the S700 family designation while supporting reliable, high-cycle motion control.