PCE835-XYZ-N Pacific Scientific
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The Pacific Scientific PCE835-XYZ-N is part of the PC800 - PCE800 Brushless Servo Drives series and delivers a continuous output power of 5.6 kW at 480 VAC, with 7.5 ARMS continuous output current at 40°C. This servo drive supports RS-232/485, ±10 VDC, Step/Dir, and Indexing command interfaces, and operates with a peak output current of 22.5 ARMS and a power stage efficiency of 97%. It features a bus capacitance energy of 70 Joules and provides internal regen power up to 100 W.
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Product Description:
The PCE835-XYZ-N is a brushless servo drive manufactured by Pacific Scientific and supplied within the PC800 – PCE800 Brushless Servo Drives series. Designed for cabinet mounting beside a motion controller, this unit converts three-phase mains power into regulated AC output that commands permanent-magnet servo motors. Through digital and analog feedback loops, it supplies phase-synchronized current so that industrial axes can accelerate, decelerate, and hold position with repeatable precision. Its internal control also provides indexing capability for stand-alone sequences.
The drive supplies a continuous phase current of 7.5 ARMS @ 40 °C, which supports mid-frame motors without additional cooling. Under the same ambient rating, it supports motor output up to 5.6 kW @ 480 VAC, matching the needs of many conveyor, gantry, and winding stations. For short acceleration bursts, current can reach 22.5 ARMS, and this transient capacity remains thermally safe thanks to a power stage that runs at 97% efficiency. A switching rate of 16 kHz reduces audible noise and improves current ripple performance. The command interface accepts RS-232/485 serial messages, ±10 V analog velocity references, step-and-direction pulses, or stored indexing tables, giving the drive multiple integration options. Average input demand on the mains is 11.0 ARMS, which helps keep cable and breaker sizing moderate.
At power-up, the DC bus charges with an inrush profile that peaks at 175 A for 1.5 msec, so line contactors must tolerate this brief surge. Once energized, the bulk capacitors retain 70 J of energy, helping maintain control voltage during short dips. Motor compatibility spans inductances from 1.7 mH to 1.7 H, allowing the drive to operate with both low-impedance torque motors and high-impedance servos without stability issues. Excess kinetic energy is dissipated first through the internal converter, which can absorb 100 W continuously, and during severe braking through an external resistor of 33 Ω that handles a shunt capability of 20 kW. This arrangement manages regenerated energy during deceleration while keeping the axis under control.
Frequently Asked Questions about PCE835-XYZ-N:
Q: What is the continuous output current of the PCE835-XYZ-N drive?
A: The PCE835-XYZ-N servo drive provides a continuous output current of 7.5 ARMS at 40°C, supporting demanding motion control tasks.
Q: What is the power stage efficiency of the PCE835-XYZ-N servo drive?
A: With a power stage efficiency of 97%, this drive ensures highly efficient energy conversion and minimal electrical losses during operation.
Q: Which command interfaces are available on the PCE835-XYZ-N drive?
A: This model offers a command interface with RS-232/485, ±10 VDC, Step/Dir, and indexing options for versatile control integration.
Q: What is the internal regeneration power rating of the PCE835-XYZ-N drive?
A: The PCE835-XYZ-N features an internal regeneration power capacity of 100 W for handling excess energy during braking cycles.
Q: What is the peak output current capability of the PCE835-XYZ-N drive?
A: It supports a peak output current of 22.5 ARMS, enabling short bursts of high current for acceleration or heavy load applications.
