S7720A-NANA-S3 Kollmorgen
Wake Industrial LLC is not an authorized distributor of this product.
The Kollmorgen S7720A-NANA-S3 is part of the S700 Servo Drives series and features a rated current of 72 Arms with a peak output current of 140 Arms. It operates on a voltage rating of 208 to 480V and has onboard EtherCAT and CANopen interfaces. The servo drive supports dual channel STO safety functionality and has a maximum noise emission of 68 dB(A).
Internal Product Review
The S7720A-NANA-S3 is a Kollmorgen S700 servo drive that stands out in demanding motion applications with 208...480V operation and EtherCAT/CANopen onboard. Rated current of 72 Arms and peak output current of 140 Arms give this unit strong dynamic performance and confident load handling. Dual-channel STO with SIL CL3 / PLe makes this drive an excellent fit for safety-focused machine designs.
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Product Description:
The S7720A-NANA-S3 is a servo drive produced by Kollmorgen within the S700 Servo Drives series. The unit regulates torque, velocity, and position for synchronous or asynchronous motors in automated machinery. By converting three-phase mains power into controlled PWM output, it closes the motion loop between the host controller and the motor, providing the dynamic response required for packaging lines, pick-and-place gantries, and similar industrial axes.
At its continuous rating, the drive delivers 72 A rms, giving ample headroom for routine process loads, while transient demands can be met with a peak output of 140 A rms for rapid acceleration or shock absorption. The power section is sized for 50 kVA of apparent input, drawn from mains that may vary from 208 to 480 V, so a single hardware code can support worldwide supply grids. Pulse-width modulation is generated at 8 kHz, a switching frequency chosen to minimize motor ripple while keeping device losses manageable. An output current form factor of 1.01 indicates nearly sinusoidal conduction, and motors with inductance down to 0.61 mH can be driven without additional filters.
Thermal management is addressed by a calculated loss of 1135 W under full-load operation; integration on a cold plate and coated PCBs help manage that heat and protect the electronics. Control electronics are powered separately at 24 V DC, drawing 2 A, which isolates low-voltage logic from the bus link and keeps the dual-channel STO circuit armed. When safe torque off is active, the drive meets SIL CL3 / PLe, permitting risk-reduced maintenance without external contactors. Acoustic output stays below 68 dB(A), supporting installation in factory zones where operators work nearby. A 10 Ω brake resistor port rated for 8 kW can be wired to discharge regenerated energy during deceleration.
