Product Description:

The S77202-NAF2-S3 is a servo drive produced by Kollmorgen and assigned to the S700 Servo Drives series. It is intended for closed-loop control of synchronous or induction motors in automated machinery. In that role, it converts the plant’s three-phase mains into regulated pulse-width-modulated output for precision torque and speed regulation. This operating profile suits motion tasks that require stable speed control and repeatable torque response across changing loads.

This model operates across an input band of 208…480 V and draws a continuous phase current of 72 Arms while processing up to 50 kVA of apparent power from the supply. Internal IGBT switching is clocked at 8 kHz, a frequency that balances dynamic bandwidth with manageable switching losses. The drive is housed in a panel-mountable IP20 enclosure, so the cabinet must provide any additional ingress protection required by the application. A depth of 244 mm, width of 190 mm, and height of 386 mm without connectors help fit the unit into multi-axis stacks. Thermal energy generated during braking can be routed to an external 10 Ω resistor that dissipates up to 8 kW, reducing stress on the DC bus. A dedicated fan-controller expansion card governs the integral blower when standard PCBs are used, maintaining internal temperatures and limiting the residual voltage drop to 6 V at the output terminals.

An AC line fuse rated at 80 A shields upstream wiring. Mechanical design limits acoustic output to 68 dB(A), helping cabinet installations remain within typical plant noise targets. Overall mass is 13 kg, which helps limit mounting load on the panel structure. Functional safety is addressed through a dual-channel STO interface that removes drive energy without opening the main contactor. This arrangement allows the control system to disable torque generation through the safety circuit while the main power hardware remains in place.