Product Description:

The SC403-001-T1 is a servo amplifier manufactured by Pacific Scientific within the SC400 Servo Drives series. It is installed between the mains supply and a three-phase brushless motor to manage velocity in automated lines, packaging stations, and material-handling axes. By rectifying the incoming AC power and modulating the output phase current, the unit forms the core of a closed-loop motion system that relies on external Tachsyn feedback and provides a dedicated fault relay for machine interlocking.

The internal DC bus is established at 160 VDC when the source is 115 VAC and rises to 320 VDC on a 230 VAC supply, giving the drive two operating ranges. During steady motion, the inverter can deliver a continuous phase current of 7.5 A, and for short accelerations it supports a peak of 15 A. Current is controlled by an analog loop with a bandwidth of 3 kHz, allowing rapid rejection of load disturbances while staying below switching-noise frequencies. The drive accepts a ±10 V velocity reference, and its offset drift is only 50 µV/°C, which helps maintain command accuracy across ambient temperature changes. Fault signaling is provided through a 30 VDC open-collector output that can sink 25 mA for direct PLC monitoring.

On a three-phase 230 VAC input, the converter can supply a continuous mechanical load of 2250 W and withstand transient demands up to 4500 W. The pulse-width-modulated output operates at an effective ripple frequency of 15 kHz, which helps minimize torque ripple in low-inductance motors. Integral dynamic-braking hardware dissipates 40 W continuously and up to 6000 W during deceleration to protect the bus from overvoltage. For installations that rely on analog tachometry, the unit supports a Tachsyn gradient of 0.5 V/Krpm. All functionality is housed in a chassis that is only 4.5 in wide, which supports dense panel layouts.