Product Description:

The PCE843-001-N is a brushless servo drive produced by Pacific Scientific and assigned to the PC800-PCE800 Brushless Servo Drives series. Designed to regulate torque and speed in industrial automation axes, the unit receives commands from a motion controller and converts them into three-phase power for a permanent-magnet motor. By integrating power electronics with digital current loops, the drive provides precise velocity control for packaging machinery, material handling stages, and other closed-loop applications where stable response and repeatable motion are required across changing load conditions.

Communication with the control system uses the SERCOS fiber-optic interface, so setpoints and feedback travel over deterministic serial telegrams with low susceptibility to electrical noise. Continuous operation is supported with a phase current of 3.75 ARMS, allowing the drive to deliver a steady mechanical output of 2.1 kW at 400 VAC. Internal IGBTs switch at 16 kHz, which improves control resolution and helps reduce motor acoustic noise during normal operation. The power stage maintains a measured efficiency of 97%, and the current-loop bandwidth supports quick torque response when load demand changes during repetitive duty cycles.

Dynamic operation is supported by a peak output of 7.5 ARMS for rapid accelerations and a corresponding mechanical ceiling of 5.3 kW for short-duration demand. Excess regenerated energy is dissipated through the internal bus clamp rated for 35 J, which helps protect the DC link during aggressive deceleration. Motors may be installed as far as 50 m from the drive without derating, provided that cable inductance remains above the 5 mH minimum. An inrush limit of 175 A moderates startup demand on the input stage, and the housing measures 254 mm × 121.7 mm × 192 mm with a mass of 3.6 kg for compact panel placement.