Product Description:

The S7720F-SNF2-F2 is a servo drive manufactured by Kollmorgen for the S700 Servo Drives series. As a drive, it modulates three-phase power for closed-loop control of synchronous or induction motors used in packaging machines, material-handling axes, and other precision automation tasks. By accepting a wide line-voltage range and providing field-oriented current regulation, the unit forms the power interface between the plant's AC mains and the motion controller that commands velocity, torque, or position.

A continuous phase output of 72 Arms allows the drive to match medium-frame motors without derating, while a five-second surge capacity of 140 Arms supplies extra torque for rapid acceleration profiles. The drive accepts an input range of 208 to 480 V, and the internal inverter operates at an 8 kHz switching frequency to balance current ripple and thermal stress. When connected to a 400 V bus, the heat sink must dissipate 1005 W, and the F2 controlled-fan cooling option starts when the internal temperature reaches 65 °C or the heat-sink surface reaches 80 °C. The minimum permissible motor inductance is 0.61 mH at the top of the voltage range, so low-reactance windings may require additional series chokes. Communication with higher-level motion systems is handled through a SynqNet interface mounted in slot 1, and two RJ-45 ports permit ring or daisy-chain network topologies.

Branch protection is provided by an 80 A AC line fuse, and the supply may deliver up to 50 kVA of apparent power during peak regeneration. Functional safety is integrated through a dual-channel STO that removes torque-producing energy without cutting main power. With a mass of 13 kg and an overall height of 505 mm with connectors, the unit can be panel-mounted without special bracing. That mass also adds cabinet-level thermal inertia during load changes. Coated printed circuit boards guard against conductive dust, and a dedicated fan-controller card coordinates airflow to maintain rated dissipation.