Product Description:

The SC402-024 is a servo drive manufactured by Pacific Scientific within the SC400 Servo Drives series. In industrial automation, it supplies regulated three-phase power to brushless servomotors and closes the torque loop internally so a motion controller can focus on velocity or position tasks. By converting single-phase mains into a controlled DC bus and high-frequency PWM output, the unit supports precise acceleration, deceleration, and steady-state speed control in pick-and-place systems, packaging axes, and similar equipment that must respond quickly to command updates.

When the drive is fed from a 115 VAC line, the internal bus is held at 160 VDC. Connection to 230 VAC raises that bus to 320 VDC. Continuous motor current is available up to 4.2 A on the lower supply and 3.5 A on the higher supply, giving the drive two thermal operating points. A current-loop bandwidth of 3 kHz allows the amplifier to reject load disturbances faster than many mechanical resonances. Pulse-width modulation runs at 20 kHz, helping reduce audible noise and motor torque ripple. The front end accepts either 115 VAC or 230 VAC without strapping, and its I/O header can source up to 10 mA for external limit switches or status LEDs.

For short bursts, the output stage delivers 7.0 A, while peak mechanical power reaches 1000 W from the 115 VAC supply and 2000 W from the 230 VAC supply. The analog current monitor presents a span of +4.4 VDC across an internal 1 kΩ divider and is scaled at 0.63 V/A, so a control system can track torque in real time. A fault transistor sinks 25 mA at up to 30 VDC to alert a PLC when overtemperature, overcurrent, or bus undervoltage occurs. Commanded velocity enters through a differential input that accepts a ±10 V signal, matching most motion cards and enabling precise speed regulation without additional signal conditioning.