SC933T2-001-01 Pacific Scientific 2.2 Kilowatt RS-232/485 Servo Drive
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The Pacific Scientific SC933T2-001-01 is a servo drive from the SC900 Servo Drives series. It delivers a continuous output current of 7.5 Amps at 2.2 kW power with a peak output current of 15 Amps and peak power of 4.5 kW. This unit supports analog, incremental digital, or serial command interfaces, and features RS-232/485 serial communications.
Internal Product Review
The SC933T2-001-01 is a Pacific Scientific SC900 servo drive with 7.5 A continuous output current and 2.2 kW continuous output power. Support for analog, incremental digital, or serial command and RS-232/485 communications gives the unit strong integration flexibility in multi-axis control platforms. A 96% power stage efficiency and 20 kHz PWM frequency make the drive a very capable choice for clean, responsive servo performance.
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Product Description:
The SC933T2-001-01 is a servo drive manufactured by Pacific Scientific for the SC900 Servo Drives series. It regulates three-phase brushless motors by modulating line power through an IGBT bridge so that velocity or torque commands from a motion controller are followed accurately in automated machinery. The unit accepts analog, incremental-digital, or serial command inputs and exchanges status data over an RS-232/485 link, allowing straightforward integration into PLC-based production cells. Because it supports several command formats, it can be used in both standalone axes and larger coordinated motion systems.
Under continuous duty, the drive supplies 7.5 A of output current and delivers 2.2 kW of mechanical power to the motor when operated from a 240 V three-phase source. Current is switched at a carrier rate of 20 kHz, which minimizes audible noise while maintaining tight current regulation. The power stage reaches an efficiency of 96%, which reduces panel heat load and allows convection operation at 25 °C or forced-air operation at 50 °C without derating. The cooling fan runs from a dedicated 240 VAC, 50/60 Hz supply and turns on as drive temperature rises. Rotor inductance requirements are broad, so motors from 2.0 mH up to 2 H line-to-line can be driven without instability. This gives the system flexibility when matching the drive to different motor types.
For acceleration and transient events, the power stage can source 15 A for five seconds, producing up to 4.5 kW of peak mechanical output before returning to continuous limits. Initial energization draws an inrush of 340 A, so a 20 A fast-acting fuse is specified on the input feeder. Excess kinetic energy is dissipated through an internal 25 Ω, 55 W resistor, while the shunt transistor can handle regeneration bursts of 6.0 kW. The drive accepts an input range of 90–264 VAC, allowing operation from a broad range of industrial line supplies.
