Product Description:

The S7480A-PNF2-PA is a digital servo drive built by Kollmorgen for the S700 Servo Drives series. Acting as the power interface between a motion controller and an AC servo motor, this unit modulates current and voltage to execute precise torque, speed, and position commands in automated machinery. Its cold-plate construction allows direct mounting to a machine frame or external heat sink, making the drive suitable for tightly packed multi-axis systems in processing, packaging, and material-handling lines.

The power stage accepts a three-phase supply from 208 to 480 V and delivers a continuous output of 48 Arms to the motor while tolerating bursts up to 96 Arms for acceleration peaks. At nominal load, the converter draws approximately 35 kVA from the mains, so upstream protection devices must be sized accordingly. Pulse-width modulation is generated at 8 kHz, a switching rate that balances acoustic noise with current ripple for medium-inertia servo motors. The unit supports motors whose phase inductance is at least 0.88 mH at 480 V, which helps limit di/dt and maintain stable current control. Dual-channel STO inputs are provided for functional safety, and analog command channels offer 20 kΩ input impedance with 1.25 mV resolution refreshed every 62.5 µs.

Thermal planning is aided by a loss figure of 685 W at 480 V, which the cold plate and optional fan controller dissipate during continuous operation. The internal gate drivers impose a voltage slew of 4.8 kV/µs at 480 V, so shielded motor cables and proper grounding are required to limit radiated emissions. Acoustic output is specified at a maximum of 62 dB(A), and permitted switching events are limited to 30 per hour to restrict thermal cycling. Protective conformal coating on the PCBs increases resistance to airborne contaminants, and the enclosure weighs 10.4 kg for panel-mount installation.