Product Description:

The S74802-PNF2-S3 is a servo drive manufactured by Kollmorgen and supplied within the S700 Servo Drives series. It interfaces between a plant’s AC mains and a synchronous or induction motor, converting the incoming voltage to a controlled three-phase output that enables precise speed, torque, and position regulation in automated machinery. This operating role makes it suitable for closed-loop motion tasks where accurate response to changing load conditions is required.

This model accepts a mains range of 208 to 480 V and internally supports a maximum DC bus of 900 VDC, giving headroom for regeneration during rapid deceleration. The output stage is clocked at 8 kHz, so current loops can be updated fast enough for demanding motion profiles. Rated continuous current is 48 Arms, while the short-term peak reaches 96 Arms for acceleration bursts. A continuous input demand of 36 kVA should be considered when sizing upstream protection. Motors with inductance down to 0.74 mH at 400 V can be driven without instability, and the rise rate of the output voltage is limited to 4.0 kV/µs to reduce insulation stress. The residual drop of 6 V minimizes thermal loss across the inverter section. Cooling is coordinated by an expansion card that controls the drive’s fans, and at mid load the blower runs at 50% speed, limiting acoustic emission to 62 dB(A). The power electronics are assembled on standard PCBs, and thermal dissipation reaches 685 W at 480 V, so cabinet airflow must remove the generated heat.

Ethernet-based machine networks are supported through two RJ45 ports that operate at 100 Mbit/s and comply with Profinet Conformance Class A/B for cyclic and acyclic data exchange. Safety is addressed by a dual-channel STO circuit that disables the power stage without waiting for a line contactor. When the drive is mounted in a ventilated enclosure, its maximum self-heating aligns with a loss figure of 685 W at 480 V, and a transport weight of 13 kg simplifies panel installation.