Product Description:

The S7720C-SNF2-S4 belongs to the S700 Servo Drives series manufactured by Kollmorgen. As a digital servo drive, it functions as the intermediary between a plant’s motion controller and the stator windings of a motor, supplying controlled current to execute torque, speed, and position commands in automated machinery. The drive’s cold-plate option allows it to mount directly on a thermally conductive surface, and a dedicated fan controller expansion card manages airflow when cabinet temperatures rise.

This model accepts a three-phase input within the wide operating band of 208–480 V, letting it operate on standard industrial mains worldwide. At a rated output of 72 Arms, the amplifier can energize mid-to-large frameless or housed servomotors without saturation. The output stage is pulse-width modulated at 8 kHz, a switching speed that minimizes current ripple and audible noise while keeping semiconductor losses manageable. Line-side conductors must handle up to 50 kVA of apparent power during peak regeneration events, and dual copper paths on the DC link accommodate an optional brake resistor protected by a 125 A fuse. Functional safety is integrated through dual-channel STO, which removes torque-producing energy in less than a millisecond when either channel is triggered.

The drive housing carries an IP20 rating, so it is installed inside an electrical cabinet that meets Pollution Level 2 and Vibration Class 3M1 requirements. An external line fuse of 80 A limits fault energy, while a residual voltage drop of 6 V across the power stage indicates low internal conduction losses. Designers can cycle power up to 30 times per hour without exceeding thermal stress limits, aided by the controlled-fan option in Slot 2 and the separate Safety 2-2 card in Slot 3. The 1.01 output-current form factor, SynqNet interface in Slot 1, and cold-plate heat path support precise, repeatable motion in packaging lines, pick-and-place robots, and material handling axes.