SC402-003-T3 Pacific Scientific
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The Pacific Scientific SC402-003-T3 is a servo drive from the SC400 Servo Drives series. It provides a continuous output current of 3.50 Amps and a peak output current of 7.0 Amps. The main input fuse is rated for 20 Amps at 250 Volts, and the control supply fuse is 0.5 Amps at 250 Volts.
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Product Description:
The SC402-003-T3 servo drive is produced by Pacific Scientific as part of the SC400 Servo Drives series. Designed for closed-loop velocity and torque regulation of brushless motors, it converts three-phase mains power into controlled current that can be commanded by a motion controller in automated assembly, packaging, and material-handling cells. By housing power electronics, signal conditioning, and protective circuits in one module, the unit simplifies panel layout and provides the electrical interface between the plant supply and the servo actuator. Its integrated layout keeps drive and interface functions in a single cabinet-mounted unit.
During operation, the drive can deliver a continuous phase current of 3.50 A, while short acceleration demands are met by a peak capability of 7.0 A. An input supply excursion to 253 VAC causes an AC-input overvoltage fault that halts output to protect the inverter. Mains conductors are protected by a 20 A, 250 V fuse, and the separate user supply provides 10 mA from the positive auxiliary rail for low-power external circuitry. The logic section is isolated by a 0.5 A, 250 V control-supply fuse, which separates low-level electronics from the main power path. This arrangement supports stable power handling during normal running and brief demand spikes without mixing user-side signals with the main output stage.
The negative auxiliary rail supplies -12 VDC for analog interface devices that require bipolar signaling. Command scaling reaches full output at 4.2 V, and the built-in current monitor follows a 0.63 V/A conversion factor for signal observation. Tachometer feedback is available at up to 2.0 V/Krpm, and the monitor output reaches 4.4 VDC with a 1 kΩ source impedance, so connected equipment should present at least 20 kΩ of load. Fault reporting uses an open-collector sink rated at 25 mA and 30 VDC, giving the control system a discrete alarm signal when protection circuits trip. These interface values support clear signal transfer to external command sources, panel meters, and controller inputs that rely on analog scaling.
Frequently Asked Questions about SC402-003-T3:
Q: What is the continuous output current provided by the SC402-003-T3 servo drive?
A: The SC402-003-T3 servo drive has a continuous output current of 3.50 A, supporting stable and sustained operation of compatible motors.
Q: What is the peak output current capability of the SC402-003-T3?
A: This drive supports a peak output current of 7.0 A for handling short-term dynamic loads.
Q: What is the AC input overvoltage fault threshold for the SC402-003-T3?
A: The SC402-003-T3 is protected against AC input overvoltage at 253 VAC to prevent electrical damage.
Q: What fuse rating does the SC402-003-T3 use for its main input?
A: It features a main input fuse rated at 20 A, 250 V for main circuit protection.
Q: What is the current monitor scale for the SC402-003-T3 servo drive?
A: The current monitor on this model has a scale of 0.63 V per ampere, aiding precise current monitoring.
