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.