Product Description:

The PC843-XYZ-T is a brushless servo drive produced by Pacific Scientific, and it belongs to the PC800–PCE800 Brushless Servo Drives series. As a panel-mounted power stage, it converts fixed-frequency three-phase mains into variable current and voltage for closed-loop control of permanent-magnet motors in automated machinery. Integrated network circuitry lets the unit exchange motion commands and status data with digital controllers, supporting coordinated axis movement in packaging lines, material-handling cells, and similar applications. Its design suits installations that require accurate motor regulation from a compact cabinet-mounted drive.

The analog command interface accepts control signals within a range of ±13.5 V, and that span allows the drive to map full torque and speed demand from an external motion card. Incoming voltage is presented to an input stage whose impedance is 50 kΩ, reducing loading on low-power control circuits. When supplied from a 240 VAC three-phase line, the power section can deliver a continuous shaft output of 1.5 kW, corresponding to a motor current of 3.6 ARMS at 25 °C. Internal IGBT switching occurs at an output ripple frequency of 20 kHz, and with optimized commutation the power stage reaches an efficiency of 98%, which minimizes waste heat and supports stable operation in enclosed control cabinets.

Start-up stresses are limited by an inrush limiter, yet the supply can momentarily see 300 A when the bulk capacitors charge. Once running, the drive supports motor leads up to 50 m long without exceeding its reflected wave ratings, allowing remote mounting of the actuator when machine layout requires separation between the motor and control panel. For deterministic motion profiles, the embedded SERCOS interface operates at up to 16 Mbaud, preserving tight synchronization between multiple axes. During rapid deceleration, the shunt network diverts regenerated energy and can absorb 30 J per event, while a 12.8 kW peak resistor prevents DC bus overvoltage. These limits set the thermal operating range for braking cycles and support reliable performance under repeated cyclic loads.