Product Description:

Kollmorgen’s S7480A-NAF2-S4 belongs to the S700 Servo Drives series and functions as a precision power stage for closed-loop motion axes in industrial automation. By converting three-phase mains power into a controlled pulse-width-modulated output, the drive regulates torque, velocity, and position for synchronous or induction servomotors. This makes it suitable for packaging lines, material-handling gantries, and indexing tables that require accurate motor control during continuous operation.

The drive accepts line supplies from 208 to 480 V and draws up to 35 kVA at full load. Its housing measures 386 mm tall, 190 mm wide, and 244 mm deep, which suits standard cabinets with clearance for the coldplate mounting surface. A coldplate interface removes heat directly to the panel, and the option package adds coated PCBs for improved resistance to moisture and dust. When the power stage is disabled, internal losses are limited to 24 W, which helps reduce standby heat inside the enclosure. A plug-in fan-controller expansion card governs three speed steps for auxiliary blowers, using Off, 50%, or 100% operation as needed. Under rated conditions, the converter delivers 48 Arms of continuous phase current with an output current form factor of 1.01, while acceleration peaks can reach 96 Arms. The bridge switches at 8 kHz, balancing acoustic output and switching losses, and the residual DC-link drop is held to 6 V to preserve motor voltage headroom.

Functional safety is provided by a dual-channel STO circuit that removes drive energy without contactors. The enclosure mass is 10.4 kg, which supports stable mounting within the cabinet. At maximum carrier frequency, acoustic emission remains below 62 dB(A), allowing use near operating areas without excessive noise. Coldplate cooling, the coated board finish, and the adjustable fan accessory support reliable operation in sealed or humid enclosures. These features help the drive manage heat and maintain stable performance in demanding industrial settings.