S74802-FBF2-S3 Kollmorgen
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The Kollmorgen S74802-FBF2-S3 is part of the S700 Servo Drives series and features a controlled fan cooling system, with the fan activating at heat sink temperatures of 80°C and internal temperatures of 65°C. This servo drive weighs 13 kilograms, has a peak output current of 96 Arms, and is rated for 208 to 480 volts input. The S74802-FBF2-S3 provides a rated current of 48 Arms, includes dual channel STO capability, and offers a safety integrity level of SIL CL3.
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Product Description:
The S74802-FBF2-S3 is a servo drive produced by Kollmorgen and positioned within the S700 Servo Drives series. Designed to regulate three-phase permanent-magnet motors in automated machinery, the unit converts line power into a modulated output that supports precise velocity, torque, and position loops through feedback encoders. Integrated motion functions, a selectable cooling profile, and built-in safety circuitry allow the drive to occupy less panel space than discrete solutions, simplifying installation in packaging, material handling, and process equipment.
Electrically, the drive accepts three-phase mains within the range of 208–480 V and delivers a continuous output of 48 Arms while permitting momentary surges up to 96 Arms for rapid acceleration or deceleration. The power stage is pulse-width modulated at 8 kHz, a switching frequency selected to reduce current ripple and audible noise. A minimum motor inductance of 0.74 mH is required at 400 V so that peak currents remain under control. Feedback encoders are powered by a regulated 5 V supply rated for 300 mA, and the S700 expansion slot can carry a dedicated fan-controller card when advanced cooling diagnostics are needed.
Thermal management is supported by a controlled fan that switches on when the internal temperature reaches 65 °C or when the heat-sink surface climbs to 80 °C. Under rated operating conditions, the drive draws 35 kVA from the mains and dissipates 635 W as heat, a figure that guides enclosure ventilation sizing. The internal IGBT bridge contributes a residual drop of 6 V, which slightly lowers the voltage available to the motor terminals. Functional safety is addressed with dual-channel STO that meets SIL CL3, allowing the drive to participate in category-rated emergency-stop chains without additional relays. Standard PCBs withstand typical industrial environments, and the aluminum housing weighs 13 kg, facilitating panel installation without auxiliary lifting equipment.
Frequently Asked Questions about S74802-FBF2-S3:
Q: What is the rated input power of the S74802-FBF2-S3 servo drive?
A: The S74802-FBF2-S3 from Kollmorgen has a rated input power of 35 kVA, supporting demanding servo drive applications.
Q: What peak output current does the S74802-FBF2-S3 provide?
A: This servo drive can deliver a peak output current of 96 Arms for short-duration load spikes.
Q: At what temperature does the heatsink fan activate on the S74802-FBF2-S3?
A: The S74802-FBF2-S3 starts its heatsink fan when the temperature reaches 80°C.
Q: What safety feature is included in the S74802-FBF2-S3 for motor shutdown?
A: Dual channel Safe Torque Off (STO) is integrated for enhanced machine safety on this drive.
Q: What voltage range is supported by the S74802-FBF2-S3 servo drive?
A: The S74802-FBF2-S3 supports a voltage range of 208 to 480 volts, making it suitable for various power systems.
