Product Description:

The SC402-016-T4 is a servo drive produced by Pacific Scientific in the SC400 Servo Drives series. It accepts command signals, conditions them, and modulates motor phase current so that brushless servomotors follow precise speed or torque references in conveyor sections, pick-and-place heads, and indexing tables. Operating with external motion controllers and tachometer feedback, the unit translates low-level references into controlled power and provides fault status together with overcurrent protection in a compact panel-mount frame.

The drive draws 115/230 VAC from the plant supply. A rectifier and filter raise this to 160 VDC on the lower line or 320 VDC on the higher line, forming the DC link for the output stage. It delivers up to 3.50 A continuously and can supply 7.0 A during short transients. A 20 A, 250 V main fuse protects the power path, while a 0.5 A, 250 V fuse guards the control circuit. The analog port treats 4.2 V as full scale for current commands, and the fault relay sinks 30 VDC at 25 mA to indicate alarms. With a form factor below 1.01, the phase waveform stays nearly sinusoidal, which helps keep motor heating low.

At the higher supply, the inverter can deliver a mechanical shaft output approaching 2000 W, giving ample reserve for rapid indexing cycles. Conversion efficiency exceeds 90%, which minimizes cabinet losses and reduces the demand on forced-air cooling. Carrier switching occurs at a 20 kHz ripple frequency, keeping audible noise outside most work-cell frequency ranges. The command channel also accepts a bipolar velocity reference of ±10 V, which works with the 4.0 V/Krpm tach gradient to create a one-to-one relationship between reference voltage and motor speed. This scaling helps simplify loop tuning and reduce following error during direction reversals.