S77202-PNF2-F2 Kollmorgen
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The Kollmorgen S77202-PNF2-F2 is a 13 kg servo drive from the S700 Servo Drives series. It features a rated input power of 50 kVA and a voltage rating of 208 to 480V. The drive has a peak output current of 140 Arms and includes dual channel STO safety capability.
Internal Product Review
The S77202-PNF2-F2 is a Kollmorgen S700 servo drive with a 208...480V rating and 72 Arms rated current. An 8 kHz switching frequency and 62.5 µs current loop cycle support crisp current regulation and stable motion response. Dual channel STO and 140 Arms peak output current make this unit a strong choice for high-demand servo applications.
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Product Description:
The S77202-PNF2-F2 is a drive in Kollmorgen’s S700 Servo Drives series. As an AC servo drive, it converts three-phase mains power into precisely controlled motor phase currents and exchanges high-speed feedback with the motion controller. In automated assembly lines, packaging cells, or material-handling gantries, it closes the torque, velocity, and position loops so that attached servomotors follow commanded trajectories with repeatable accuracy.
Under nominal loading, the unit supplies 72 Arms of continuous output current while accepting up to 50 kVA from a 208–480 V three-phase supply. For dynamic moves, it can deliver 140 Arms for 5 s as a short-term current reserve. The PWM bridge is refreshed every 62.5 µs by the current loop and is modulated at 8 kHz, giving tight torque control with low acoustic noise. Two analog inputs and four digital inputs allow velocity or torque references, as well as limit and enable functions, to be wired directly to the drive. This arrangement supports direct connection of common machine interlocks and reference signals without extra interface hardware. The power section is rated for 30 switching operations per hour, maintaining thermal stability when the main contactor cycles frequently.
The drive housing measures 386 mm high, 190 mm wide, and 244 mm deep and weighs 13 kg, making it suitable for panel mounting alongside filter and brake components. An internal fan is governed by the dedicated expansion card, and the brake output can source 3 A to energize an external caliper. When required, the integrated chopper can divert up to 8 kW into a 10 Ohm resistor to dissipate regenerated energy. Safe torque-off is implemented as Dual channel STO, allowing machine builders to meet Category 3 or higher stop functions without external contactors. Coated standard PCBs protect the control electronics from airborne oils and dust. This helps maintain reliable operation in cabinets where fine contamination may accumulate over time.
