SC904-032-01 Pacific Scientific
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The Pacific Scientific SC904-032-01 servo drive is part of the SC900 Servo Drives series and provides a continuous output current of 15.0 Amps and a peak output current of 30.0 Amps. It delivers a continuous output power of 4.5 kW at 240V and achieves a power stage efficiency of 97%. Command interface options include analog or incremental digital.
Internal Product Review
The SC904-032-01 is a Pacific Scientific SC900 servo drive with an analog or incremental digital command interface and 97% power stage efficiency. Continuous output of 15.0 A and peak output of 30.0 A give the drive excellent current headroom for demanding motion profiles. A 4.5 kW continuous power rating makes the SC904-032-01 a strong choice for reliable servo performance.
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Product Description:
The SC904-032-01 is a servo drive manufactured by Pacific Scientific for the SC900 Servo Drives series. In an automation cell, it forms the power stage between a motion controller and a brushless servomotor, regulating phase currents so the motor can follow precise velocity or position commands. Acting as a stand-alone amplifier, it accepts three-phase 240 VAC mains power and delivers controlled current to rotary or linear axes used in material handling, packaging, and general machinery. This arrangement allows the motion controller to issue low-power commands while the drive supplies the electrical power required by the motor.
The drive’s command interface is selectable as analog or incremental digital control, allowing the system to use either ±10 V velocity commands or step-and-direction pulse trains without changing the hardware. With natural convection at 25 °C, the drive can sustain a motor phase current of 15.0 A, which establishes the available continuous torque for a compatible motor. This operating point corresponds to a thermally limited shaft output of 4.5 kW when the drive receives three-phase power at its stated voltage. During acceleration or brief load transients, the current can rise to 30.0 A. The inverter permits a momentary mechanical output of 9.0 kW for these short-duration demands. The unit does not provide network communication, so tuning gains, current limits, and fault thresholds are adjusted locally through its available controls.
A power-stage efficiency of 97% limits waste heat, reducing panel ventilation demands and supporting closer cabinet spacing than less efficient amplifiers. Compatible motors must have line-to-line inductance between 1.0 mH and 1 H. Keeping motor inductance within this range prevents excessive ripple current at the high pulse-width modulation switching frequency while preserving satisfactory current-loop bandwidth. Natural-convection operation requires sufficient open space around the enclosure so heat can move away from the power stage. Motor selection must also account for the drive’s continuous and peak current capabilities, particularly when an application includes repeated acceleration cycles or rapidly changing loads.
