Product Description:

The S74802-2CF2-F2 is a servo drive built by Kollmorgen for the S700 Servo Drives series. As a regenerative power stage, it sits between a three-phase mains supply and a synchronous servo motor, converting line energy into controlled output current for precision axis control in industrial automation cells. The drive regulates torque, velocity, and position commands from a motion controller, and it manages returned braking energy to maintain bus stability during fast stops. It suits packaging, printing, and material-handling equipment that demand fast dynamic response.

Its input section accepts a line-to-line voltage of 208 to 480 V, and the power module is rated for 35 kVA, allowing the drive to feed demanding axes without derating. Under continuous operation, the current limit is 48 Arms, while transient accelerations can draw 96 Arms for 5 seconds before thermal cutback. The IGBT output bridge is pulse-width modulated at 8 kHz, a switching frequency chosen to limit audible motor noise while maintaining current-loop bandwidth. An IP20 housing permits installation inside a closed control cabinet; the unit is 244 mm deep, 386 mm high, and 190 mm wide, and it weighs 13 kg. A 15 Ω external brake resistor ties into the bus, and a dedicated fan controller expansion card manages airflow across the standard PCB option.

During deceleration cycles, the drive can absorb 8 kW of continuous brake power, matching the specified resistor value to prevent overvoltage on the DC bus. Control electronics see only a 6 V residual voltage drop, so motor torque does not sag when the line dips. For safety integration, the unit offers dual-channel STO, enabling immediate torque removal through two independent inputs rather than a mechanical contactor. The drive is suitable for rapid reversal and closed-cabinet applications that require regenerative braking and integrated safety.