S7720A-DNF2-F2 Kollmorgen
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The S7720A-DNF2-F2 is a servo drive manufactured by Kollmorgen as part of the S700 Servo Drives series. It features a rated current of 72 Arms and operates at a voltage range of 208 to 480 V across three phases. The drive includes a dual channel STO safety capability, provides IP20 enclosure protection, and supports DeviceNet fieldbus communication.
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Product Description:
The S7720A-DNF2-F2 is an AC servo drive produced by Kollmorgen within the S700 Servo Drives series. It converts three-phase line power into precisely regulated current and voltage for synchronous servo motors, allowing closed-loop speed, torque, and position control in automated machinery, material handling systems, and packaging lines.
The command interface includes an analog input stage with an impedance of 150 kΩ; this high resistance minimizes loading of upstream controllers. The same channel is refreshed every 62.5 µs, so analog setpoints track rapidly changing motion profiles. Power enters on a 3~ network rated for 208…480 V, and the inverter can deliver a continuous motor phase current of 72 Arms. Internal link capacitors sustain a DC bus potential up to 900 VDC, providing reserve energy for acceleration. A dedicated brake output can source 2 A to release a motor-mounted holding brake during motion. Communication to higher-level PLCs is handled through a DeviceNet fieldbus port, while an installable fan-controller expansion card governs external cooling fans when the drive is mounted to a cabinet coldplate.
Environmental and safety parameters frame the remaining operating envelope. The drive accepts an auxiliary supply of 24 VDC so control electronics stay active during mains shutdowns, and its functional safety block offers Dual channel STO to remove torque without opening the power circuit. An IP20 housing protects internal boards; the rating is shown as IP20 because the unit is intended for clean electrical enclosures. Coated PCBs plus a coldplate option guard against condensation at up to 85% RH. Reliable service is specified through 40 °C maximum ambient temperature and installation heights to 1000 m. Together these limits ensure stable operation when the fan controller moderates heatsink temperature and the 24 V auxiliary source maintains logic power.
Frequently Asked Questions about S7720A-DNF2-F2:
Q: What is the rated current for the Kollmorgen S7720A-DNF2-F2 servo drive?
A: This drive offers a rated current of 72 Arms to support high-power applications.
Q: What fieldbus interface does the S7720A-DNF2-F2 support?
A: Its fieldbus interface is DeviceNet, enabling integration with DeviceNet-compatible systems.
Q: What supply voltage and phase requirements does the S7720A-DNF2-F2 have?
A: The S7720A-DNF2-F2 operates on a three-phase supply at voltages from 208 to 480V.
Q: What expansion card is included with the S7720A-DNF2-F2 servo drive?
A: This unit comes equipped with a fan controller as the expansion card option.
Q: What level of enclosure protection does the S7720A-DNF2-F2 provide?
A: The enclosure protection for this model is rated as IP20.
