Product Description:

The SC403-013-T4 is a servo drive produced by Pacific Scientific as part of the SC400 Servo Drives series. The unit conditions incoming single-phase or three-phase line power and generates a controlled three-phase output for brushless servomotors. This supports precise velocity and current regulation in automated packaging, material handling, and general motion platforms where accurate synchronization across factory automation lines is required. It is intended for closed-loop motion tasks that need consistent motor response during speed changes, load changes, and repeated start-stop cycles.

With a 115 Vac supply, the internal bus is maintained at 160 VDC, while a 230 Vac line raises the bus to 320 VDC. Under continuous load, the amplifier supplies 7.5 A and can reach a peak of 15 A for short accelerations. A current control bandwidth of 3 kHz supports tight torque loops, and the velocity input accepts a ±10 V command. Offset drift is limited to 50 µV/°C, so low-speed creep remains stable as temperature changes. Feedback from the motor tachsyn is interpreted at 4.0 V/Krpm, and the power devices switch at a 15 kHz ripple frequency to minimize acoustic noise. A fault transistor capable of sinking 25 mA provides a logic-level alarm output to the host controller.

At the higher mains tap, the drive can deliver 4500 W of shaft power. Regenerative energy is dumped into an integral resistor that handles 40 W continuously and tolerates 6000 W in short intervals to protect the bus. The module has an overall width of 4.5 in, which allows dense stacking inside control cabinets and helps when multiple axes are mounted side by side. This arrangement helps keep adjacent wiring runs short and preserves cabinet space for line reactors, contactors, and control hardware. Reliable performance is specified up to 1500 m elevation without derating, provided ambient airflow meets design assumptions.