SC904T1-001-01 Pacific Scientific
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The SC904T1-001-01 is a servo drive manufactured by Pacific Scientific as part of the SC900 Servo Drives series. It provides a continuous output current of 15 A and a continuous output power of 4.5 kW, with a peak output current of 30 A and a peak power of 9 kW. The drive operates at a nominal bus voltage of 320 VDC and has a power stage efficiency of 97%.
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Product Description:
The SC904T1-001-01 servo drive is manufactured by Pacific Scientific as part of the SC900 Servo Drives series. Designed for precision motion tasks, the unit converts DC bus energy from its associated rectifier into controlled three-phase power for brushless servomotors. In factory automation lines, it regulates torque, speed, and position feedback so that pick-and-place axes, winding stations, or material-handling stages maintain repeatable performance during continuous operation. Closed-loop regulation helps the motor respond consistently when commanded speed or load changes occur during a production cycle.
The drive’s continuous ratings describe its steady-state operating range. It can deliver 15 A of output current, translating to 4.5 kW of mechanical power at the motor shaft when the DC link is held near 320 VDC. Internal IGBTs operate with a switching frequency of 20 kHz, which minimizes audible noise and improves current resolution. A power-stage efficiency of 97% limits heat rise, while the integrated fan, supplied from 120 VAC 60 Hz, removes the remaining losses. For short acceleration cycles, the current can rise to 30 A before electronic limits intervene. Motors connected to the drive must present a minimum phase inductance of 1.0 mH so the current regulators remain stable. The shunt regulator can dissipate 125 W continuously and 12 kW in brief transients to clamp the bus voltage.
Dynamic capacity is expressed by a peak mechanical output of 9 kW, giving reserve for rapid indexing or emergency stops. Installation flexibility is aided by a maximum motor cable length of 50 m, allowing the controller to stay inside a control cabinet while the servo sits on the machine frame. It also supports cabinet-mounted installation where longer cable routing is required between the drive and the machine axis. Motor inductance must not exceed 1 H, ensuring that current slew rates remain within the servo loop bandwidth. The cable length and inductance limits keep the motor-drive combination within the intended electrical operating range.
Frequently Asked Questions about SC904T1-001-01:
Q: What is the continuous output current rating of the SC904T1-001-01 servo drive?
A: The SC904T1-001-01 servo drive provides a continuous output current of 15 A for ongoing operation.
Q: What is the maximum motor cable length supported by the SC904T1-001-01?
A: This model supports maximum motor cable lengths of up to 50 meters, allowing flexibility in installation.
Q: What is the power stage efficiency of the SC904T1-001-01 servo drive?
A: The SC904T1-001-01 achieves a power stage efficiency of 97%, reducing energy losses during operation.
Q: What is the peak output power capability of the SC904T1-001-01?
A: Peak output power for this servo drive reaches up to 9 kW, supporting high-demand applications.
Q: What supply voltage does the SC904T1-001-01 cooling fan require?
A: The cooling fan of this model requires a supply voltage of 120 VAC at 60 Hz.
