Product Description:

The SC403-012-T3 is a servo drive manufactured by Pacific Scientific and belongs to the SC400 Servo Drives series. This unit conditions incoming mains power and delivers controlled three-phase output so that brushless servo motors can hold position and respond accurately during acceleration or deceleration in automated machinery. In packaging, assembly, and material-handling stations, the drive interfaces with a motion controller to translate command signals into regulated motor current and voltage for closed-loop speed and torque control.

For line connection, the drive accepts an input of 115/230 VAC, allowing operation from standard single-phase or three-phase service. It can supply a continuous motor current of 7.5 A, which sets the thermal limit for long-term motor excitation. When powered from a single-phase 230 VAC source, the amplifier can deliver 1575 W of continuous mechanical output for steady-state duty. Internally, operation on 115 VAC charges the DC link to 160 VDC, giving the inverter stage the voltage headroom needed to create sinusoidal phase currents. Current response is governed by a control-loop bandwidth of 3 kHz, meaning the drive can correct current errors quickly and support fast dynamic torque demands.

When the same hardware is fed with three-phase power at the higher input voltage, continuous shaft capability rises to 2250 W, allowing larger loads to be moved with the same unit. Transient events such as rapid indexing or shock loads can be handled with a peak current of 15 A, while operation at that mains level produces a DC bus of 320 VDC that improves voltage utilization at elevated speeds. Under those conditions, the inverter can momentarily supply up to 4500 W of peak mechanical power, matching the velocity command range provided through a ±10 V analog reference without affecting loop stability.