Product Description:

The S7720F-2CF2-S4 servo drive is produced by Kollmorgen as part of the S700 Servo Drives series. It interfaces between a motion controller and an AC servomotor, converting line energy into precisely regulated phase currents for position, velocity, and torque control. Used in packaging stations, robotics, and metal-cutting machinery, the unit provides fast current loops, integrated fieldbus connectivity, and built-in safety for demanding automation tasks. This type of control is useful for axes that must accelerate quickly, hold speed accurately, and respond consistently to command changes.

Operating from a three-phase supply of 208 to 480 V, the drive draws up to 50 kVA and supplies a continuous output of 72 Arms with short-term capability to reach 140 Arms. The power transistors switch at 8 kHz, which helps keep current ripple low while limiting residual voltage drop across the stage to 6 V. Two onboard CAN connectors and an internal 120 Ω termination support daisy-chained bus wiring, and dual-channel STO disables power instantly for safety. A plug-in fan controller expansion card commands the heat sink blower once 80 °C is detected. The housing depth is 285 mm, and the height with connectors fitted is 505 mm, which helps with cabinet space planning. The unit ships with coated printed circuit boards to improve resistance to moisture and dust.

Power dissipation reaches 1005 W during full operation at a 400 V DC link, yet it falls to 24 W when the outputs are disabled. The internal cooling fan is enabled at 65 °C, and maximum acoustic emission remains below 68 dB(A). The drive also uses an auxiliary heat sink blower to support thermal control during sustained operation. Clear ventilation around the cooling path helps reduce heat buildup inside enclosed panels. The unit has a mass of 13 kg, so the mounting structure must support that load and airflow paths should remain unobstructed.