Product Description:

The S7720F-SEF2-PM is a servo drive manufactured by Kollmorgen for the S700 Servo Drives series. It converts three-phase plant power into precisely modulated current that commands brushless servo motors in packaging machines, pick-and-place axes, and robotics. The unit integrates power electronics, a motion processor, and safety logic so that a single enclosure performs torque, speed, and position control without additional external converters. As part of the series, it shares a common programming environment and drive profile, which helps simplify multi-axis deployment across an automation cell.

The drive accepts an input range of 208 to 480 V three-phase, allowing it to operate on standard plant supplies. Under nominal load, it delivers 50 kVA of apparent power while drawing 72 Arms. For fast transient moves, the current can rise to 140 Arms for up to 5 seconds, after which thermal models return the output to its continuous rating. The output stage is pulse-width modulated at 8 kHz, a switching frequency that helps reduce audible noise and smooth motor torque. SERCOS II fiber-optic ports on the front panel provide deterministic communication with programmable automation controllers, enabling sub-millisecond cycle updates. The drive supports up to 30 switch operations per hour, which suits indexing or palletizing duties that involve frequent enable events.

Service voltage at 24 V DC maintains the logic circuits, and the integrated brake relay sources 3 A to release or set a motor brake. Safety is handled by the dual-channel STO circuit, which removes energy from the output stage without disabling the control bus. Heat is extracted by a controlled fan that is monitored by a plug-in fan controller expansion card, and coated printed circuit boards help protect the drive from airborne moisture and dust. The housing measures 386 mm tall, 190 mm wide, and 244 mm deep, yet it weighs only 13 kg, which helps ease panel mounting beside other S700 units.