Product Description:

The S7480A-SEF2-S4 is a servo drive manufactured by Kollmorgen within the S700 Servo Drives series. The unit operates as a regulated power stage between three-phase mains and a synchronous servomotor, shaping current and voltage so industrial axes follow commanded motion profiles with repeatable accuracy. By integrating power conversion, communication, and safety functions, it streamlines control-cabinet layouts and supports packaging, printing, and material-handling machinery that rely on coordinated positioning.

In nominal operation, the drive accepts line supplies from 208 to 480 V, and it delivers a continuous phase current of 48 Arms while supporting demands up to 96 Arms for rapid acceleration. The internal IGBT bridge switches at 8 kHz, a compromise that limits acoustic noise while providing fine current resolution. Kollmorgen specifies a minimum motor inductance of 0.88 mH at 480 V to keep ripple within control margins, and a current form factor of 1.01, indicating that RMS and average output differ by only one percent during sinusoidal commutation. A residual voltage drop of 6 V across the power stage must be considered when calculating motor back EMF and cable losses.

The cold plate heat sink routes losses directly to a machine-mounted liquid-cooled or conductive surface, and its efficiency is reflected in a thermal dissipation of 685 W at 480 V combined with a disabled-stage loss of 24 W when the power stack is not active. Dual fans are governed by the dedicated fan controller expansion card, while connections in Slot 1 use the SERCOS II interface for deterministic cyclic data. Safety is addressed by the dual channel STO circuit, which removes torque without relays. Additional features include coated PCBs for contamination resistance, noise emission limited to 62 dB(A), the cold plate plus coating option, a mass of 10.4 kg, and a width of 190 mm.