S77202-NAF2-NA Kollmorgen
Wake Industrial LLC is not an authorized distributor of this product.
The Kollmorgen S77202-NAF2-NA is a servo drive from the S700 Servo Drives series. It supports EtherCAT and CANopen fieldbus, has a continuous brake power of 8 kW, and a peak output current of 140 Arms. The drive features a dual channel STO capability, operates at a voltage rating of 208 to 480V, and weighs 13 kilograms.
Internal Product Review
The S77202-NAF2-NA is a Kollmorgen S700 Servo Drive with an IP20 enclosure. From a drive engineering standpoint, dual-channel STO and built-in EtherCAT/CANopen support make machine integration especially efficient. Rated for 72 Arms with 140 Arms peak output current, the drive stands out as a capable choice for demanding motion applications.
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Product Description:
The S77202-NAF2-NA is a Kollmorgen drive controller within the S700 Servo Drives series, intended to supply regulated three-phase power to servo motors in automated machinery. By combining power conversion, motion control, and integrated communication, the unit serves as a single-axis amplifier for equipment that requires coordinated velocity or torque loops during normal machine operation. EtherCAT and CANopen interfaces are built in, giving PLCs deterministic access to status words and setpoints over the fieldbus network without extra gateway hardware.
The drive accepts mains in the range of 208–480 V and can draw up to 50 kVA under full load. Its rated phase current is 72 Arms, while short-duty acceleration or impact loads can be supplied with a peak of 140 Arms. Pulse-width modulation is performed at a switching frequency of 8 kHz, which balances motor acoustic behavior with semiconductor loss. The housing has an IP20 rating, so it must be installed inside a control cabinet but still allows direct access for top-entry power and feedback connectors during panel integration. The enclosure measures 386 mm tall, 190 mm wide, and 244 mm deep, and its mass of 13 kg supports mounting on standard DIN rails or backplates in enclosed industrial cabinets. An internal fan provides cooling, and audible noise remains at 68 dB(A) during rated operation in normal service.
Dynamic stops are supported by a braking circuit that can dissipate 8 kW through either the integrated chopper or a 10-ohm external resistor during deceleration events. During regeneration, the residual DC-link voltage is limited to 6 V, which helps prevent nuisance tripping of downstream contactors. For functional safety, a dual-channel STO input removes gate power from the IGBTs, providing a redundant torque-off path without affecting fieldbus wiring. Continuous operation is further supported by standard-grade PCBs and a brake power rating matched to the converter’s thermal design for sustained industrial use.
