Product Description:

The S77202-DNF2-F2 is a servo drive produced by Kollmorgen and belongs to the S700 Servo Drives series. It links the three-phase mains to a matched motor. It converts line voltage into regulated current and voltage vectors so industrial axes can follow precise torque, speed, or position commands on automated lines.

This drive carries a continuous motor supply capability of 72 Arms, sustained by a bus that can draw up to 50 kVA from a three-phase source. An internal brake chopper routes regenerated energy to an auxiliary channel rated for 8 kW of continuous brake power, supporting deceleration without overvoltage. Pulse-width modulation operates at 8 kHz, balancing ripple with switching losses, and the power stage accepts line voltages from 208–480 V, so the model can serve varied plant standards. Peak current can be sustained for up to 5 seconds, allowing short bursts of torque before thermal cutback is applied. Thermal management is handled by the F2 controlled fan cooling option, while a fan controller expansion card modulates airflow in response to heat sink temperature. Command and diagnostic data flow through the DeviceNet fieldbus, which supports networked machine architectures. Under full load, acoustic emission stays below 68 dB(A), helping keep operating noise low.

The enclosure has an IP20 rating that confines live parts and requires installation inside a cabinet. Functional safety is supported by a built-in dual-channel STO circuit that removes torque-producing power on demand. When dynamic braking exceeds the internal capacity, an external resistor of 10 ohms can be wired to absorb excess energy. The output voltage edges are limited to 4.8 kV/µs at a 480 V bus, reducing stress on motor insulation. Mechanical dimensions of 190 mm width, 244 mm depth without connectors, and 386 mm height allow high-density panel layouts, and the assembly weighs 13 kg for handling. The drive uses standard PCBs.