Product Description:

The S7720F-DNF2-PM servo drive is produced by Kollmorgen and belongs to the S700 Servo Drives series. It serves as the power and control interface between a three-phase mains supply and a brushless or induction motor, providing speed and torque regulation for automated packaging lines, printing machines, and material-handling cells. Catalog data places the unit in the same S700 drive class, underlining its role as a modular axis controller that integrates with external safety functions and fieldbus links.

Electrical performance centers on a continuous output of 72 Arms and a peak capability of 140 Arms, both delivered from a supply range of 208…480 V. The converter draws up to 50 kVA from the mains and modulates the motor phases at a switching frequency of 8 kHz, allowing effective current control down to a motor inductance of 0.61 mH at 480 V. Thermal energy is removed through an internal fan—commanded by a dedicated expansion card—that starts at 65 °C to maintain safe heat dissipation. Logic and position-capture signals are referenced to 5 V Posi/O levels, keeping encoder and limit-switch wiring electrically isolated from the power section.

The drive offers functional safety through dual channel STO, removing gate signals to the output stage without mechanical relays. On the DeviceNet network a bus impedance of 120 Ω is maintained, and the controller can occupy any of 64 nodes; the latter figure simplifies large axis installations. Noise emission does not exceed 68 dB(A) at full load. Standard construction uses coated PCBs, and the option list also covers uncoated boards when environmental humidity is low. At 386 mm high, 190 mm wide, and 244 mm deep, the aluminum housing fits medium cabinets, while total mass is held to 13 kg. During high-duty cycles the power stage releases 1135 W to ambient, a value that dictates cabinet airflow planning.