S7720F-FBF2-PA Kollmorgen
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The Kollmorgen S7720F-FBF2-PA is part of the S700 Servo Drives series and weighs 13 kilograms. This servo drive offers a rated current of 72 Arms with a peak output current of 140 Arms for up to 5 seconds. It features a rated input power of 50 kVA, operates at a voltage rating of 208 to 480V, and has a dual channel STO capability.
Internal Product Review
The S7720F-FBF2-PA is a Kollmorgen S700 servo drive with IP20 enclosure protection and a 208...480V voltage rating. Rated current of 72 Arms and peak output current of 140 Arms give the unit strong servo authority during demanding motion profiles. Dual channel STO and an 8 kHz output stage frequency support safe, responsive integration in high-performance axis control.
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Product Description:
The S7720F-FBF2-PA servo drive is produced by Kollmorgen and belongs to the S700 Servo Drives series. As a digitally controlled power stage, it interfaces between a three-phase mains supply and a synchronous or induction motor, managing torque, speed, and position loops for automated machinery in packaging lines, robotics, and test systems. The closed control structure helps the axis respond quickly to commanded motion and changing load conditions during operation. Cooling is controlled by the fan-controller expansion card, and coated PCBs may be specified to resist oil mist or humidity.
The drive accepts a three-phase line in the range of 208 to 480 V, allowing it to be installed on low- or medium-voltage distribution panels worldwide. Under nominal conditions, it draws 72 A rms and can supply up to 50 kVA of apparent power to the motor, which sets conductor sizing and protective device ratings. During acceleration or impact loading, it provides 140 A rms for 5 s, granting short bursts of extra torque without breaching thermal limits. The output transistors switch at 8 kHz, which minimizes current ripple and motor acoustic noise while enabling tighter current-loop bandwidth. This combination supports demanding moves such as rapid indexing and the control of high-inertia loads.
Continuous regenerative energy is absorbed by an internal brake circuit rated at 8 kW, and higher dissipation can be handled by an external resistor of 10 ohms. Safety functions are integrated through dual-channel STO, permitting SIL-compliant emergency stops without mechanical contactors. The housing carries an IP20 rating, weighs 13 kg, and measures 386 mm high, 190 mm wide, and 244 mm deep, so it fits in standard 300 mm control cabinets while leaving clearance for airflow. The enclosure is intended for cabinet use, where the airflow path can be maintained around the heat-producing components.
