Product Description:

The S7480A-SEF2-NA servo drive is built by Kollmorgen as part of the S700 Servo Drives series. Designed for automation axes that require precise torque and speed regulation, it converts three-phase mains power into controlled motor current. The unit supplied here is the cold-plate version with coated printed circuit boards, an option that supports liquid cooling and helps protect the electronics from airborne contaminants. When the drive is mounted against an external heat sink, cabinet temperatures can be reduced while keeping a single-module footprint.

With connectors installed, the drive stands 505 mm tall, 285 mm deep, and 190 mm wide. Removing the plugs reduces those dimensions to 386 mm in height and 244 mm in depth, which makes panel insertion easier. During steady-state operation, it supplies up to 48 Arms, and for acceleration intervals the current limit rises to 96 Arms. The power section accepts line voltages from 208 to 480 V and can draw as much as 35 kVA under peak demand. Motor phase current is pulse-width modulated at 8 kHz, a switching rate chosen to limit acoustic noise and winding losses while maintaining dynamic response.

Additional parameters support safe and quiet operation. The output crest-to-RMS relation remains tight at 1.01, which helps reduce harmonic heating in the connected motor. Functional safety is provided by a dual-channel STO circuit that disables torque when either channel is triggered. Brake energy of up to 8 kW can be dissipated through an internal chopper or routed to a 15 Ω external resistor, and the residual DC link loss is 24 W when dissipation is disabled. Airborne sound stays below 62 dB(A). The cold-plate assembly weighs 10.4 kg, and an optional fan-controller expansion card can drive auxiliary blowers while the 6 V residual voltage drop helps prevent inadvertent regeneration.