Product Description:

The S7720F-NAF2-S3 servo drive is manufactured by Kollmorgen as part of the S700 Servo Drives series. It converts the incoming three-phase mains supply into controlled output pulses that manage motor torque, speed, and position in industrial automation lines such as conveyors, winders, and pick-and-place stations. The device is an S700 Servo Drive and fits IEC drive architectures used in modern plant automation, where coordinated axis control and stable power conversion are required across multiple operating modes.

At the mains terminals, the drive accepts a line-to-line voltage anywhere within 208–480 V, allowing direct connection to common industrial supply systems. Under nominal conditions, it draws up to 50 kVA and delivers a continuous phase current of 72 Arms to the motor. For acceleration or shock loads, the output can be boosted to 140 Arms while retaining an output current form factor of 1.01, so harmonics stay close to the sinusoidal reference. A residual voltage drop of 6 V across the inverter stage and a minimum motor inductance of 0.61 mH at 480 V help maintain stable current regulation and protect the IGBTs from overcurrent events.

Thermal management is planned around a loss figure of 1135 W at 480 V, so heat sinks and cabinet airflow must be sized accordingly. The drive integrates dual channel STO inputs so motion can be disabled without removing mains voltage. During every switching edge, the internal bridge produces a dv/dt of 4.8 kV/µs, so shielded motor cables and proper grounding are necessary. Installation space is set by 190 mm of width, 285 mm of depth with connectors, and 505 mm of height with connectors, and the assembly weighs 13 kg. A dedicated fan-controller expansion card supports forced cooling, and this model uses coated PCBs to improve reliability in humid environments. The coated finish also helps protect the circuit boards from moisture exposure inside enclosed industrial cabinets.