Product Description:

The S7720A-SNF2-PM is a servo drive manufactured by Kollmorgen within the S700 Servo Drives series. It is installed between a three-phase power bus and a brushless servo motor to modulate current, velocity, and position in automated machinery. By combining digital control with hardware safety functions, the unit supports coordinated motion tasks that require fast response in modern production lines. Closed-loop regulation helps the drive maintain stable motion during acceleration, deceleration, and changing load conditions.

This drive operates from a three-phase supply that can vary from 208–480 V without derating, and at its thermal limit it delivers a continuous phase current of 72 Arms. Short load surges are handled by a peak output of 140 ARMS per phase that may be sustained for 5 s before automatic foldback occurs. The hardware is certified to SIL 3 and PL e, and a dual-channel Safe Torque Off circuit disconnects the power stage when either channel is interrupted. An IP20 housing provides basic touch protection inside a control cabinet, and power arrives through the rated three-phase AC input. This arrangement suits equipment that needs repeatable current control and integrated safety functions.

The internal brake chopper can dissipate up to 8 kW, and an external resistor of 10 ohms may be wired for additional energy absorption. When the output is inhibited, the electronics draw only 24 W, which helps limit heat inside the enclosure during idle states. Option codes add a cold-plate interface and coated circuit boards for areas with higher thermal load or airborne contaminants, and a dedicated fan-controller expansion card is available for auxiliary cooling. The assembly weighs 13 kg and measures 386 mm in height, 190 mm in width, and 244 mm in depth, which supports installation in standard 600 mm deep control enclosures. The physical layout also leaves room for cable routing and ventilation clearance in tightly packed panels.