Product Description:

The S7720F-SNF2-PA is a servo drive produced by Kollmorgen as part of the S700 Servo Drives series. Deployed inside multi-axis machines, it regulates torque, speed, and position of synchronous or induction motors, forming the link between motion controllers and actuators in automated lines. This role lets the drive translate controller commands into regulated motor output while maintaining consistent axis behavior during starts, stops, and speed changes.

This unit draws a continuous phase current of 72 Arms and can deliver surges up to 140 Arms for short acceleration periods, so motor sizing can match demanding load profiles without oversizing the supply. It accepts mains from 208…480 V, letting the same hardware operate on a wide range of three-phase networks. A pulse-width-modulated bridge switches at 8 kHz, which helps reduce audible noise and torque ripple during operation. Two differential analog inputs are paired with two outputs that provide 16-bit resolution for command and feedback channels used in tension, pressure, or flow control. Additional connectivity is provided through dual RJ45 fieldbus ports, and a dedicated expansion slot carries a fan-control card that modulates cabinet airflow. Rated input power is 50 kVA, the internal residual voltage drop is limited to 6 V, and up to 30 switching cycles per hour are permitted.

Functional safety is addressed by integrated dual-channel STO, which allows immediate torque removal without external contactors. When operating on a 400 V bus, the drive releases 1005 W of heat, so cooling capacity must be planned to keep the power semiconductors within their intended temperature range. The housing measures 505 × 190 × 285 mm and weighs 13 kg, which helps when panel depth, width, and mounting load must be considered early in the layout. Forced convection or liquid cooling is required to remove the generated heat during sustained high-load operation.