S7720F-DNF2-F2 Kollmorgen
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The S7720F-DNF2-F2 is an S700 Servo Drive manufactured by Kollmorgen, featuring a rated current of 72 Arms and peak output current of 140 Arms. It offers a DeviceNet fieldbus, dual channel STO capability, and operates at a switching frequency of 8 kHz. The drive has a voltage rating of 208 to 480 V and weighs 13 kilograms.
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Product Description:
The S7720F-DNF2-F2 is a servo drive manufactured by Kollmorgen and delivered within the S700 Servo Drives series. Positioned between the plant AC mains and a servo motor, it converts fixed-frequency input power into a controlled variable output that supports closed-loop positioning, velocity, and torque commands from a machine controller. The unit is intended for cabinet installation where high dynamic response and integrated safety are required, and it combines the power stage and low-voltage electronics in one housing to simplify system layout for conveyors, robotic cells, and process equipment. In closed-loop motion systems, it helps keep axis response consistent during rapid starts, stops, and speed changes.
On the power side, the drive accepts a line supply of 208 to 480 V from three-phase networks and delivers 72 Arms of continuous output current, which suits medium-frame motors used in fast indexing axes. During short acceleration peaks, the current can rise to 140 Arms, helping the motor overcome static friction and brief overloads without requiring a larger drive. The input section is rated at 50 kVA, and the IGBT output stage switches at 8 kHz to help produce a smoother current waveform with lower acoustic noise from the motor. These operating limits are supervised by the internal control electronics to protect the power section during cyclic duty.
Low-voltage functions are supplied by a 24 V DC auxiliary source, and a separate brake output can provide up to 3 A for a motor holding brake when used with the specified external resistor. Functional safety is implemented with dual-channel STO, which removes torque-producing energy while allowing control logic to remain active for diagnostics and network communication. The enclosure has an IP20 rating for use inside a protected control cabinet, and forced airflow is handled by the factory-installed fan arrangement. Card slots can accept a dedicated fan controller and a DeviceNet communication board, and optional coated PCBs can improve reliability in humid production areas.
Frequently Asked Questions about S7720F-DNF2-F2:
Q: What is the peak output current of the S7720F-DNF2-F2 servo drive?
A: The S7720F-DNF2-F2 servo drive supports a peak output current of 140 Arms.
Q: What type of fan option is featured in the S7720F-DNF2-F2 drive?
A: This model includes a controlled fan as its built-in fan option.
Q: Which fieldbus protocol can be used with the S7720F-DNF2-F2?
A: The S7720F-DNF2-F2 offers DeviceNet as its supported fieldbus communication protocol.
Q: What is the protection rating of the S7720F-DNF2-F2 servo drive?
A: The S7720F-DNF2-F2 has a protection rating of IP20, indicating basic protection against solid objects.
Q: What is the rated input power of the S7720F-DNF2-F2 servo drive?
A: The rated input power for this model is 50 kVA, allowing it to handle significant power loads.
