SC903-020-01 Pacific Scientific
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The Pacific Scientific SC903-020-01 is a servo drive from the SC900 Servo Drives series. It offers a continuous output current of 7.5 Amps and a continuous output power of 2.2 kW at 240V, with peak output currents reaching 15 Amps and peak power at 4.5 kW. The drive features a power stage efficiency of 96% and supports both analog and incremental digital command interfaces.
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Product Description:
The SC903-020-01 is a cabinet-mount drive module manufactured by Pacific Scientific and assigned to the SC900 Servo Drives series. Designed for integration with motion controllers, this unit converts a 240 VAC three-phase supply into regulated motor currents so that brushless servomotors can follow commanded speed or torque profiles. By coordinating motor behavior with external automation logic, the drive supports indexing tables, conveyors, and material-handling axes that require repeatable positioning accuracy and thermal stability during continuous duty. Its cabinet-mounted format keeps the power electronics in a protected enclosure while leaving motion sequencing to the external controller.
The front end accepts motion references through an analog or incremental digital command interface, allowing either ±10 V velocity loops or A/B quadrature step commands. This flexibility allows the same drive family to work with systems that output analog speed references or pulse-based position commands. Under natural convection at 25 °C, the power stage can deliver a continuous phase current of 7.5 A, which corresponds to a sustained mechanical output of 2.2 kW when it is fed from a 240 VAC supply. For short accelerations or transient load spikes, the current reserve rises to 15.0 A, helping the connected motor overcome high-inertia starts without loss of synchronization. The internal IGBTs operate at a measured efficiency of 96%, which limits heat generation and helps keep enclosure cooling requirements manageable.
No dedicated network electronics are provided, and the unit offers no fieldbus communication, so setup and diagnostics rely on the same analog or incremental channels used for motion references. As a result, system integration depends on point-to-point control wiring rather than a shared communications network. Motor compatibility requires an inductance window from 2.0 mH to 20 mH; motors outside this range may experience current ripple or unstable control loops. During peak regenerative events, the converter can source up to 4.5 kW of mechanical power, a capacity suited to rapid deceleration cycles in packaging or semiconductor equipment. This regenerative handling supports applications that repeatedly slow heavy loads or reverse direction over short cycle times.
Frequently Asked Questions about SC903-020-01:
Q: What command interface options are available on the SC903-020-01 servo drive?
A: The SC903-020-01 servo drive supports both analog and incremental digital command interfaces for flexible integration.
Q: What is the continuous output current rating of the SC903-020-01 servo drive?
A: This model delivers a continuous output current of 7.5 A at 25°C under convection cooling conditions.
Q: What is the continuous output power of the SC903-020-01 servo drive at 240V three-phase input?
A: At 240V three-phase input and 25°C, the SC903-020-01 provides up to 2.2 kW of continuous output power.
Q: What is the peak output current of the SC903-020-01 servo drive?
A: The SC903-020-01 offers a peak output current of 15.0 A for short bursts of higher demand.
Q: What is the power stage efficiency of the SC903-020-01 servo drive?
A: This servo drive operates at a power stage efficiency of 96%, helping reduce energy loss during operation.
