SC403-004-T3 Pacific Scientific
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The Pacific Scientific SC403-004-T3 is part of the SC400 Servo Drives series and operates with a bus voltage of 160 VDC at 115 volts and 320 VDC at 230 volts. This servo drive delivers a continuous current of 7.5 Amps and a peak output current of 15 Amps, with a peak power rating of 4500 Watts at 230 volts. It features a 3 kHz maximum current loop bandwidth and has a width of 4.5 inches.
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Product Description:
The SC403-004-T3 servo drive is produced by Pacific Scientific within the SC400 Servo Drives series. It acts as the power interface between a motion controller and a servomotor, rectifying incoming AC line power and generating a controlled DC link that the drive’s H-bridge then modulates for precise torque or velocity control. Designed for multi-axis machinery, it supplies regulated current, monitors feedback, and issues fault signals so automated stages, feeders, or gantries can be commanded with repeatable accuracy.
On a 115 VAC supply, the internal bus is stabilized at 160 VDC; the same circuit reaches 320 VDC when 230 VAC is available, giving the drive two operating ranges from one model. During continuous operation, the amplifier can source 7.5 A to the motor windings, a rating sized for mid-frame servomotors in packaging or electronics assembly lines. The current loop is tuned for response up to 3 kHz, allowing controller gains to be set aggressively without instability. Switching occurs at an output ripple frequency of 15 kHz, moving electromagnetic noise outside most audible bands and reducing mechanical vibration. For acceleration or disturbance rejection, the power stage can momentarily deliver a peak of 15 A, provided thermal limits are observed. A logic-level fault output with a 30 VDC, 25 mA sink is available so supervisory PLCs can react instantly to overcurrent, overtemperature, or encoder-loss events.
The unit can furnish up to 2250 W of shaft power from a 115 VAC line and scales to 4500 W when energized from 230 VAC. Regenerative energy produced during rapid deceleration is routed to a shunt circuit rated for 6000 W pulses, preventing bus overvoltage without external braking components. Tachometer feedback is supported with a gradient of 2.0 V/Krpm, matching common 50 V/25 Krpm sensors, while a ±10 V velocity command input integrates with analog motion cards. The chassis measures 4.5 inches wide, allowing high-density installation in control cabinets alongside additional SC400 modules.
Frequently Asked Questions about SC403-004-T3:
Q: What are the bus voltage ratings for the SC403-004-T3 servo drive?
A: The SC403-004-T3 drive operates with a bus voltage of 160 VDC when supplied with 115V and 320 VDC with 230V.
Q: What is the continuous current capability of the SC403-004-T3?
A: This servo drive delivers a continuous output current of 7.5 A.
Q: What is the maximum current loop bandwidth for the SC403-004-T3?
A: The SC403-004-T3 can achieve a current loop bandwidth of up to 3 kHz.
Q: What are the peak power ratings of the SC403-004-T3 at 115V and 230V?
A: The peak power output is 2250 W at 115V supply and 4500 W at 230V supply.
Q: What is the supported velocity input command for the SC403-004-T3 drive?
A: This drive accepts a velocity input command in the ±10 V range.
