S7720F-FBF2-S3 Kollmorgen
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The Kollmorgen S7720F-FBF2-S3 is an S700 Servo Drive rated for input voltages from 208 to 480 volts and can supply a peak output current of 140 Arms. It features an enclosure rating of IP20 and supports a rated input power of 50 kVA, with dual channel STO safety capability. The drive includes a fan controller expansion card and has standard and coated PCBs for enhanced environmental protection.
Internal Product Review
The S7720F-FBF2-S3 is a Kollmorgen S700 servo drive designed for precise motion control across 208...480 V systems. Rated current of 72 Arms and peak output current of 140 Arms give the drive strong headroom for demanding servo axes. Dual-channel STO adds a valuable layer of machine safety, making the unit a dependable high-performance drive choice.
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Product Description:
The S7720F-FBF2-S3 is a servo drive produced by Kollmorgen for the S700 Servo Drives series. As an axis controller, it regulates torque, speed, and position in industrial automation systems that use permanent-magnet servo motors. By converting three-phase mains power to controlled output current, the unit supplies closed-loop motion with encoder feedback while integrating easily into cabinet-mounted control architectures.
This drive accepts a mains range of 208 to 480 V and draws up to 50 kVA of input power under nominal load. Motor current is delivered continuously at 72 Arms, with transient demands handled to 140 Arms. A carrier setting of 8 kHz sets the power-stage switching frequency and reduces motor acoustic noise. Line protection is provided by an 80 A AC supply fuse, while a 150 kΩ analog input resistance and a 62.5 µs analog update rate support high-resolution velocity or torque commands. Braking energy can be dissipated through a 10 Ω external resistor, and the unit may be cycled on and off up to 30 times per hour without derating. Mechanical resilience is classified to vibration class 3M1, and feedback expansion is available through a dedicated fan controller card. Standard or conformally coated PCBs allow use in pollution level 2 environments. A secondary encoder port supplies 5 V DC at 300 mA for position devices that need auxiliary power.
Functional safety is addressed by dual-channel STO, which removes torque without disrupting the control program. Cabinet layout is simplified by the IP20 housing that allows convection or forced-air cooling, and the internal fan activates once the heat sink reaches 65 °C. Regenerative energy is managed continuously up to 8 kW, and the built-in fan controller stabilizes thermal load during frequent acceleration cycles.
