Product Description:

The PC834-001 is a brushless servo drive produced by Pacific Scientific within the PC800-PCE800 Brushless Servo Drives series. It regulates current, velocity, and position for permanent-magnet motors in automated machinery and robotics. The drive connects to host controllers through an RS-232/485 serial link, accepts ±10 V analog velocity or torque commands, and can also follow step-and-direction or internal indexing references. This allows flexible integration into distributed motion architectures.

During continuous operation on a 240 VAC three-phase supply, the power section can deliver 3.0 kW while supplying a steady motor phase current of 7.1 ARMS. Output voltage is switched at a 16 kHz ripple frequency, which reduces audible noise and smooths motor torque production. The input side draws a root-mean-square line current of 12 A, which is used when sizing fuses and feed conductors. Internally, the IGBT bridge achieves a power-stage efficiency of 98%, so only a small portion of the delivered energy becomes heat. Energy returned from decelerating loads is absorbed by the shared DC bus up to 40 J before external braking resistance is required. Three optically isolated outputs and a relay rated at 1 A and 30 VDC report fault or motion status to the cell controller.

The drive supports motors whose phase inductance is no lower than 1.25 mH, which helps prevent excessive current ripple at the selected switching frequency. For rapid accelerations, the current loop can reach a peak value of 21.2 ARMS, enabling short bursts of mechanical power up to 9.0 kW without violating safe operating limits. The housing measures 198.1 × 114 × 158 mm, so multiple axes can be mounted side by side on a standard panel. Six optically isolated user inputs allow programmable sequence control, while the auxiliary +5 V supply provides 250 mA for external encoder or sensor logic.