PC834-XYZ-A Pacific Scientific
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The Pacific Scientific PC834-XYZ-A is a brushless servo drive from the PC800 - PCE800 Brushless Servo Drives series. It supports RS-232/485, 10 Vdc, step/direction, and indexing command interfaces, with a continuous output current of 7.1 ARMS and peak output current of 21.2 ARMS. The drive delivers continuous power of 3.0 kW, peak power up to 9.0 kW, and weighs 2.6 kilograms.
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Product Description:
The PC834-XYZ-A brushless servo drive is produced by Pacific Scientific as part of the PC800-PCE800 Brushless Servo Drives series. The unit receives motion commands from a host controller and modulates three-phase power to a brushless servomotor, allowing accurate torque, speed, and position regulation in packaging lines, pick-and-place axes, and other industrial automation cells. It is intended for servo applications that require repeatable response during indexing, positioning, and speed-controlled operation.
The drive operates from a 240 VAC three-phase supply and delivers a continuous output current of 7.1 ARMS, corresponding to a sustainable mechanical power of 3.0 kW when paired with a matched motor. Under these operating conditions, the RMS line demand is 12 A, which helps size upstream circuit protection. Internally, a high-frequency PWM stage runs at 16 kHz, which reduces audible noise and improves current-loop resolution. The power electronics reach a calculated efficiency of 98%, so only a small fraction of the input energy is dissipated as heat. Acceptable motor inductance spans from 1.25 mH to 1 H, giving the product flexibility with low- or high-inductance windings. Command inputs include RS-232 or RS-485 serial links, a ±10 VDC analog channel, step-and-direction pulse trains, and onboard indexing sequences. The enclosure dimensions are 198.1 mm high, 114 mm wide, and 158 mm deep, and the unit has a mass of 2.6 kg.
For short accelerations or shock loads, the power stage can source a peak current of 30 A, which the current regulators present to the motor as 21.2 ARMS for up to a few seconds. At that limit, the output power rises momentarily to 9.0 kW, enabling fast index moves without oversizing the continuous rating. Motor leads may be installed up to 50 m in length without violating rise-time or commutation accuracy limits, which simplifies cabinet placement relative to the axis. This is useful in machine layouts where the electrical cabinet cannot be mounted close to the motor.
