Product Description:

The S7720A-FBF2-F2 is a servo drive designed and manufactured by Kollmorgen for the S700 Servo Drives series. The unit converts three-phase mains power into controlled output for synchronous or induction servomotors used in positioning, packaging, and material-handling axes. It supports both synchronous and induction motor types, which broadens the range of compatible machine axes. Within an automation cell, it forms the interface between the motion controller and the motor, executing current loops, field-oriented control, and integrated safety functions used in high-performance machinery.

The drive accepts line voltages from 208 to 480 V at a supply frequency of 50 or 60 Hz, and upstream protection is provided by an 80 A AC supply fuse. Its nominal output current is 72 Arms, and a residual voltage drop of 6 V across the internal IGBTs must be considered when sizing motor windings. The housing has an IP20 enclosure rating, so the unit is intended for installation inside a switch cabinet with forced convection controlled by the fan-controller expansion card. Power devices switch at an 8 kHz output stage frequency to balance current ripple and thermal stress, while the dual-channel STO circuit removes motor torque without opening the main contactor. This allows the safety function to disable torque production without mechanically interrupting the main power path.

The cabinet feeder must supply up to 50 kVA and maintain the DC link within 290 to 675 VDC. In the event of a utility fault, the drive can withstand a prospective short-circuit current of 42 kA RMS without loss of containment. Continuous switching produces 1135 W at 3 x 480 V, so airflow should be verified when the permitted power-cycling rate reaches 30 cycles per hour. The optional cold-plate and coated PCB package improve heat transfer and add protection for the electronics. Installation mass is 13 kg, allowing rigid fastening on standard backplates without additional supports.