SC402-037-T3 Pacific Scientific
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The Pacific Scientific SC402-037-T3 is part of the SC400 Servo Drives series and accepts input voltage of 115 or 230 VAC in one or three phase. It has a rated continuous current of 3.50 Amps and a peak output current of 7.0 Amps. The drive outputs a bus voltage of 160 VDC at 115 VAC and 320 VDC at 230 VAC.
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Product Description:
The SC402-037-T3 is a servo drive produced by Pacific Scientific for the SC400 Servo Drives series. It is intended to regulate torque and speed in permanent-magnet motors used in industrial automation cells, packaging lines, and material-handling axes. By converting single- or three-phase AC utility power into a controlled DC bus and high-frequency switched output, the unit supplies the precise current waveforms required for closed-loop motion control.
When the drive is fed from a 115 VAC source, the internal bus reaches 160 VDC, and this rises to 320 VDC at 230 VAC. A built-in current monitor provides a full-scale reading of 4.4 VDC; combined with a scaling factor of 0.63 V/A, it lets a PLC track armature current directly through an analog input. Pulse-width modulation occurs at an output ripple frequency of 20 kHz, keeping motor acoustic noise and current ripple low. The drive accepts either one- or three-phase input over the 115/230 VAC range without tap changes, so the same model can be used in mixed-voltage plants. For feedback, a tachsyn generator delivering 2.0 V per krpm can be connected to the velocity loop, while the ±10 V differential analog input serves as the primary speed command.
A fault relay is energized through a collector rated for 30 VDC and can sink up to 25 mA to signal overcurrent, overtemperature, or loss-of-feedback events to external safety systems. At the power stage, the inverter can deliver a peak output of 7.0 A for acceleration transients and a rated continuous current of 3.50 A under steady load. An auxiliary 5 V port supplies 10 mA for encoder excitation, and the velocity command channel supports ±10 V for host control. Because the input bridge accepts either single- or three-phase mains, the drive can be connected to different plant wiring arrangements without additional transformers.
