SC403-002-T4 Pacific Scientific
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The Pacific Scientific SC403-002-T4 is part of the SC400 Servo Drives series and provides a continuous output current of 7.5 Amps with a peak output current of 15 Amps. It operates at bus voltages of 160 VDC for 115 Vac and 320 VDC for 230 Vac, delivering continuous power up to 2250 Watts on 230 Vac three-phase. The drive has an efficiency greater than 90 percent and a current loop bandwidth of up to 3 kHz.
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Product Description:
The SC403-002-T4 is a servo drive developed by Pacific Scientific for the SC400 Servo Drives series. Designed to regulate torque and velocity in permanent-magnet motors, the unit converts line power to a controlled DC bus and a high-frequency switching output suitable for closed-loop motion axes. Within an automation cell, it supplies current, monitors feedback, and communicates velocity commands, allowing precise speed control without external amplifiers or separate fault indicators.
With a 115 VAC input, the internal rectifier establishes a DC bus of 160 VDC. When the input is raised to 230 VAC, the bus rises to 320 VDC. A pulse-width-modulated bridge running at an output ripple frequency of 15 kHz drives the motor phases, while a current loop with up to 3 kHz bandwidth maintains force linearity. Under continuous duty, the amplifier delivers 7.5 A, and it can supply a peak of 15 A for transient load changes. The velocity command interface accepts a differential signal of ±10 V, enabling straightforward coupling with analog PLC cards. Overall conversion efficiency stays above 90%, reducing cabinet heat and line loading. A dedicated fault transistor sinks 25 mA at 30 VDC to alert supervisory controls when over-temperature, over-current, or loss of feedback conditions appear.
Power capability changes with the supply configuration. With a single-phase 115 VAC line, the drive can furnish up to 2250 W during acceleration, while the same hardware reaches 4500 W on a three-phase 230 VAC source. Continuous ratings cover 800 W at 115 VAC, 1575 W on 230 VAC single-phase, and 2250 W when the two additional phases are present, which sets clear limits for steady-state loading. Speed feedback is scaled by a tach gradient of 4.0 V/Krpm, allowing the controller to translate analog tachometer voltage directly into rotational velocity for the inner loop. Physical integration is simplified by a cabinet width of 4.5 in, so multiple axes can be mounted on a standard 19-inch panel without spacing conflicts.
Frequently Asked Questions about SC403-002-T4:
Q: What is the continuous output current rating of the SC403-002-T4 servo drive?
A: The SC403-002-T4 provides a continuous output current of 7.5 A for consistent drive performance.
Q: How much continuous output power does the SC403-002-T4 offer when supplied with 230 Vac three-phase?
A: With 230 Vac three-phase input, this drive delivers continuous power up to 2250 W.
Q: What is the peak output current capability of the SC403-002-T4 servo drive?
A: The SC403-002-T4 has a peak output current rating of 15 A for short-term demands.
Q: What is the maximum current loop bandwidth of the SC403-002-T4 servo drive?
A: Its current loop bandwidth reaches up to a maximum of 3 kHz.
Q: What bus voltage does the SC403-002-T4 generate when powered with 115 Vac?
A: For a 115 Vac supply, the bus voltage provided is 160 VDC.
