Product Description:

The S7720A-SEF2-NA servo drive is produced by Kollmorgen as part of the S700 Servo Drives series. It converts the plant's three-phase mains into controlled output for synchronous and induction motors, allowing precise velocity and torque control in automated assembly lines and motion platforms. Integrated safety stop logic, dual-channel STO, and fiber-optic SERCOS networking let the module fit directly beside PLCs and motion controllers without additional interface converters.

The drive delivers a continuous phase current of 72 Arms, which is the maximum load it can sustain without exceeding temperature limits. Its incoming supply may reach 50 kVA, so line protection and cabling must be sized for that apparent power. Pulse-width modulation operates at a switching frequency of 8 kHz, which reduces motor ripple while staying within the silicon's thermal limits. The permissible mains span of 208 to 480 V allows the same hardware to operate on both low- and high-voltage plant buses. Under rated load the power section dissipates 1005 W; this heat is removed by a controlled fan mounted on a cold plate, and the output-current form factor of 1.01 shows that the drive's current waveform is nearly sinusoidal.

Transient demands are handled by a peak output capability of 140 Arms for short cycles. Acoustic emission stays below 68 dB(A), supporting installation near occupied work areas. With connectors fitted, the housing measures 505 mm in height, 190 mm in width, and only 285 mm in depth, while the total mass is 13 kg, so panels can meet weight and clearance limits. Communication uses SERCOS II over fiber optics through an F-SMA connector arranged in a ring topology, and an onboard expansion card controls the cooling fan. Coated printed-circuit boards enhance tolerance to humidity and airborne contaminants.