Product Description:

The S7480C-NAF2-S4 servo drive is manufactured by Kollmorgen as part of the S700 Servo Drives series. This coldplate-cooled unit conditions three-phase mains power and supplies regulated current to matched servo motors, enabling precision torque, speed, and position loops in automated assembly cells, packaging lines, and robotic axes. By embedding drive, safety, and diagnostic functions in one chassis, it simplifies cabinet wiring while supporting the dynamic motion profiles required in modern industrial automation. Its coldplate interface allows direct mounting to a machine's liquid-cooled manifold or a shared heat sink.

The drive delivers a continuous phase current of 48 Arms, providing the thermal limit for steady-state loads. For rapid acceleration, it can supply 96 Arms peak, enabling short bursts of high torque without overstressing the IGBTs. A line-side rating of 35 kVA is the maximum apparent power that upstream breakers, cables, and transformers must handle. Internal power devices switch at 8 kHz, a frequency that balances current ripple with switching losses for medium-inertia servo motors. The enclosure has an ingress protection rating of IP20, so the unit must be mounted inside a cabinet. Mechanical integration is supported by a 190 mm width, 386 mm height, 244 mm depth, and a coldplate mass of 10.4 kg.

The input bus supports 208 to 480 V, and the power section is designed to withstand a dv/dt of 4.8 kV/µs, limiting stress on motor insulation during each switching edge. Under full load, the drive rejects 685 W of heat into the coldplate, so proper coolant flow is essential to maintain semiconductor junction temperatures. Safety is addressed through a dual-channel STO circuit that removes torque-producing energy without dropping control power, while the optional fan-controller expansion card manages auxiliary cooling devices. A residual voltage drop of 6 V and a minimum motor inductance of 0.88 mH help determine suitable cable lengths and motor pairings.