S7720A-FBF2-PM Kollmorgen
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The Kollmorgen S7720A-FBF2-PM is an S700 Servo Drive with a rated input power of 50 kVA and a rated current of 72 Arms. Part of the S700 Servo Drives series, it includes dual channel STO capability and features IP20 protection. The drive weighs 13 kg, operates at a voltage rating of 208 to 480 V, and produces a maximum noise emission of 68 dB(A).
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Product Description:
The S7720A-FBF2-PM is a digital servo drive produced by Kollmorgen within the S700 Servo Drives series. It converts rectified line power into controlled three-phase output for synchronous or induction motors, delivering the position and velocity loops required for industrial automation cells. Integrated control functions, a safety stop interface, and support for secondary encoder feedback allow this single-axis module to fit inside OEM cabinets where space, wiring simplicity, and motion response are important. By combining power electronics, signal processing, and diagnostic functions, the drive replaces discrete amplifier cards and contactors, which helps reduce panel complexity.
Its power stage accepts three-phase input from 208 to 480 V and can continuously deliver 72 A rms, which corresponds to a nominal apparent power of 50 kVA at the DC link. A carrier setting of 8 kHz sets the switching pattern of the IGBTs, balancing dynamic response with conducted emission limits. The safety input provides dual-channel STO, which removes gate-drive energy for rapid motor de-energization. When the enable signal is removed, the inverter dissipates only 24 W, and the residual voltage drop is limited to 6 V, which helps minimize heat during regenerative operation. Secondary encoder ports supply 5 VDC at 300 mA, while a 3 A output is available for a holding brake. The integrated fan-controller expansion card works with the cold plate and coated PCB option to help maintain internal temperatures during up to 30 permitted switch cycles per hour without derating.
The housing is 190 mm wide and 244 mm deep, while the height reaches 386 mm, so the unit occupies less than one square foot of panel area. The chassis weighs 13 kg. An IP20 ingress rating means it must be mounted inside a cabinet, which simplifies airflow because no environmental sealing is built in. During operation, the cooling fans limit audible output to 68 dB(A), keeping sound levels within common industrial guidelines for continuous exposure.
