S74802-PNF2-S4 Kollmorgen
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The Kollmorgen S74802-PNF2-S4 is an S700 Servo Drive with a rated input power of 35 kVA and a rated current of 48 Arms. It features dual channel STO capability, operates at a voltage rating of 208 to 480 volts, and is equipped with a fan controller expansion card. With a weight of 13 kg and a noise emission of 62 dB(A), it offers a safety level of SIL CL2 / PLd.
Internal Product Review
The S74802-PNF2-S4 is a Kollmorgen S700 servo drive with a 48 Arms rated current and 35 kVA rated input power. Dual-channel STO and SIL CL2 / PLd support give this unit strong safety integration for demanding motion systems. An 8 kHz switching frequency stands out for smooth and controlled drive performance.
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Product Description:
The S74802-PNF2-S4 is a servo drive produced by Kollmorgen within the S700 Servo Drives series. As a drive, it supplies regulated three-phase power to synchronous or induction servomotors, monitors feedback, and coordinates dynamic torque and speed commands in automated machinery. By combining power conversion, real-time control, and integrated safety, the unit enables axis motion for packaging lines, robots, and material-handling stations where precise acceleration profiles and rapid positioning cycles are required.
During continuous operation, the drive delivers a rated output current of 48 Arms, allowing it to energize medium-frame motors without current derating. The three-phase mains range of 208 to 480 V permits installation on both low- and high-voltage plant busbars, while the associated input demand reaches 35 kVA under full load. Power devices are modulated at 8 kHz, a switching frequency that balances acoustic emission with current-loop bandwidth. For high-torque bursts, the inverter can maintain peak current for 5 s, supporting rapid indexing or quick start-stop sequences before thermal limits are reached. Internal heat sinks shed 24 W when the fan is disabled, and a dedicated fan controller card starts cooling once the temperature exceeds 65 °C.
Functional safety is addressed by a rated level of SIL CL2 / PLd together with a hardware-based dual channel STO circuit that removes torque within microseconds during an emergency stop. Mechanical integration is straightforward: the aluminum housing measures 386 mm in height, 190 mm in width, and 244 mm in depth without connectors, while shipping mass is 13 kg. This footprint supports cabinet installation where depth and side clearance must stay controlled. Acoustic output is limited to 62 dB(A), making the unit suitable for assembly cells where routine access is frequent. A 60 A AC line fuse protects upstream wiring, and the residual DC bus drop of 6 V assists in braking resistor sizing.
