SC904AN-046-01 Pacific Scientific
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The Pacific Scientific SC904AN-046-01 is a servo drive from the SC900 Servo Drives series with a power stage efficiency of 97 percent and convection cooling. It offers both analog and incremental digital command interfaces, featuring a peak output current of 30 Amps and continuous output power of 4.5 kilowatts at 240 Volt three-phase input.
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Product Description:
The SC904AN-046-01 servo drive is manufactured by Pacific Scientific and belongs to the SC900 Servo Drives series. It is a standalone power module that accepts reference signals from an external motion controller and conditions three-phase power for a synchronous or brushless DC motor. By precisely modulating phase current, the unit supports accurate position, speed, and torque control in pick-and-place gantries, printing presses, and indexing tables. Setup is handled through onboard analog or incremental digital ports, so separate fieldbus hardware is not required.
Under natural convection at 25 °C, the drive can deliver a continuous phase current of 15.0 A. This output supports steady-state motor torque without thermal derating. With a three-phase 240 V supply, it provides a continuous mechanical output of 4.5 kW for mid-range servo axes. For rapid acceleration or transient loads, the current limit rises to 30.0 A, and the power stage can momentarily supply up to 9.0 kW; internal protection timers limit these peak values. The power stage operates at 97% efficiency, which helps reduce cabinet heat and lowers demand on the power supply.
Motion commands reach the amplifier through an analog or incremental digital interface, so velocity and torque loops can be driven directly from conventional control signals. The output stage is compatible with motors whose line-to-line inductance falls between 1.0 mH and 1 H, and staying within that range helps maintain current-loop stability and limit overvoltage during commutation. Thermal management relies on a convection-cooled chassis with no fan, which simplifies maintenance and supports operation in clean room or low-noise areas. Base Servo Software stored in memory provides the core tuning and diagnostic functions used to match the drive to a wide variety of motor and load combinations.
Frequently Asked Questions about SC904AN-046-01:
Q: What command interfaces does the SC904AN-046-01 servo drive offer?
A: The SC904AN-046-01 supports both analog and incremental digital command interfaces.
Q: What is the continuous output current rating for the SC904AN-046-01?
A: This servo drive can deliver a continuous output current of 15.0 A at 25°C with convection cooling.
Q: What is the peak output power of the SC904AN-046-01 at 240 VAC?
A: The SC904AN-046-01 achieves a peak output power of 9.0 kW when operated at 240 VAC.
Q: What method is used to cool the SC904AN-046-01 servo drive?
A: Cooling for this unit is accomplished by natural convection without a fan.
Q: What is the power stage efficiency of the SC904AN-046-01?
A: Power stage efficiency for the SC904AN-046-01 is rated at 97%.
