Product Description:

The PC844-XYZ-N is a brushless servo drive produced by Pacific Scientific as part of the PC800-PCE800 Brushless Servo Drives series. It conditions three-phase mains power and modulates current for permanent-magnet servo motors used in material handling, packaging, and assembly cells. The housing is 114 mm wide, 158 mm deep, and 198.1 mm high, which helps conserve panel space in compact control cabinets. By converting AC input to a regulated DC link and closing high-bandwidth current loops, the drive serves as the electrical interface between a motion controller and the mechanical axis it operates.

Powered from a 240 Vac three-phase supply, the internal link maintains 320 VDC, providing the headroom needed for rapid speed changes. Commands are exchanged over the SERCOS Network, allowing deterministic fiber-optic communication of setpoints and status data. Under continuous duty, the inverter supplies 7.1 A rms to the motor, which corresponds to 3.0 kW of mechanical output at rated voltage and speed. Insulated-gate transistors switch at 16 kHz, which helps limit audible noise while keeping switching losses within the thermal range of the unit. During sustained operation, the drive draws 12 A rms from the line and maintains current-loop stability with motors whose phase inductance ranges from 1.25 mH to 1 H.

For acceleration bursts, the power stage allows 21.2 A rms, equal to 30 A peak, and can deliver up to 9.0 kW before returning to continuous ratings. Conversion efficiency reaches 98%, which helps reduce excess heat inside the cabinet and supports compact enclosure layouts. A motor cable can extend to 50 m without exceeding voltage-drop or dV/dt limits, which supports installations where the drive and motor must be mounted apart. This layout flexibility is useful on larger machines where cable routing must follow moving assemblies, guarded sections, or remote motor mounting positions.