Product Description:

The S7720F-PBF2-S3 is a digital servo drive manufactured by Kollmorgen as part of the S700 Servo Drives series. Serving as the power and control interface between the supply network and a servo motor, the unit converts three-phase input power into precisely modulated output waveforms required for closed-loop motion profiles. When integrated into industrial automation cells, it provides acceleration control, safe torque shutdown, and fieldbus communication for coordinated multi-axis machinery.

It accepts three-phase line potentials from 208–480 V and draws up to 50 kVA of apparent power at full load. Under continuous duty, the output stage supplies 72 Arms, while transient demands can be met with a peak of 140 Arms. Pulse-width modulation is clocked at 8 kHz, producing low current ripple for high-bandwidth torque loops. Protection against solid objects is limited to the IP20 enclosure level, so installation inside a control cabinet is required. Cooling is handled by a controlled fan whose speed is managed by the included fan-controller expansion card. A maximum noise emission of 68 dB(A) is noted, and up to 30 on and off cycles per hour are permissible without derating. PROFIBUS connectivity allows cyclic setpoint exchange and diagnostics.

Its width is 190 mm, its depth with connectors is 285 mm, and its height with connectors is 505 mm, allowing vertical rack mounting alongside other S700 units. The drive mass is 13 kg, so standard panel supports are sufficient. Control electronics are supplied from a buffered 24 VDC auxiliary input, which maintains parameter memory and powers the cooling fan when the mains is isolated. Safety is addressed through dual channel STO hardware that removes torque-producing energy without interrupting fieldbus communication. This variant uses coated printed circuit boards, which improve resistance to moisture and conductive dust.