Product Description:

The S74802-EIF2-S4 is a servo drive produced by Kollmorgen within the S700 Servo Drives series. Serving as the power interface between a motion controller and a three-phase servo motor, it adjusts phase current in real time to hold commanded position and velocity while processing feedback from external encoders. Integrated safety functions and a compact package let machine builders deploy high-performance axes in packaging, printing, and material-handling equipment without adding external inverters.

The power section accepts three-phase mains from 208 to 480 V, so the same unit can operate on both low-voltage and standard industrial grids. Under continuous load, it delivers 48 Arms of motor current, and it draws a maximum apparent input of 35 kVA that must be considered when sizing fuses and cabling. IGBTs switch at 8 kHz, giving adequate current-loop bandwidth without excessive switching losses. A residual voltage drop of 6 V across the bridge is factored into motor selection to avoid back-EMF saturation at top speed. Functional safety is provided by a dual-channel STO system that removes energy from the motor circuit when both channels are de-energized, eliminating the need for external contactors.

Integration into a cabinet is simplified by a 190 mm width, 244 mm body depth, and 386 mm height, and the enclosure weighs 13 kg. Cooling air is managed by a dedicated fan controller expansion card, and operating noise remains below 62 dB(A). Control electronics are powered from an auxiliary supply of 24 V DC that also feeds two configurable digital I/O points and four fixed digital inputs for enable, start, or homing functions. During acceleration, the drive can supply a peak motor current of 96 Arms, and the standard PCBs specified for this option maintain temperature limits under that short-term load.