Product Description:

The Pacific Scientific PC833-XYZ-A brushless servo drive belongs to the PC800–PCE800 Brushless Servo Drives series. Designed for automation axes that demand closed-loop torque and velocity regulation, the unit converts digital motion commands into three-phase motor currents. It supports multiple command interfaces, including RS-232/485 serial links, a ±10 VDC analog reference, step-and-direction pulses, and internal indexing. By integrating these channels with onboard current, velocity, and position loops, the PC833-XYZ-A acts as the central power stage and control node between a machine controller and a brushless servo motor.

With a continuous output of 3.6 ARMS at 25 °C, the drive can supply rated motor current without overheating, while the short-term ceiling of 10.6 ARMS covers acceleration or shock loads. The drive updates torque commands every 62.5 µsec, giving the current loop enough bandwidth to reject rapid load disturbances. Speed corrections run on a separate cycle of 250 µsec, allowing precise velocity tracking even when the outer position loop is executed externally. Differential analog commands up to ±13.5 V are accepted, providing proportional speed or torque references from PLC cards without saturating the input amplifiers. An internal 20 A fuse protects the DC bus from sustained overcurrent events.

Single-ended analog references extend to ±21 V, adding headroom for controllers that swing beyond the usual ±10 V limit. For incremental motion sources, the emulated encoder channel streams quadrature feedback at 833 kHz, whereas step-and-direction inputs are decoded up to 800 kHz, so high-resolution trajectories are reproduced without pulse loss. The resolver interface measures rotor position at 24 bits/rev, supporting smooth motion at all speeds. Fast decode timing down to 0.6 microseconds, a compact enclosure measuring 198.1 mm by 88.1 mm by 158 mm, and a mass of 2 kg help simplify installation inside crowded electrical panels.