Product Description:

The SC723A-001-PM72028 is a servo controller built by Pacific Scientific and assigned to the SC720 Command Controllers series. Within a servo control system, this unit supplies regulated three-phase power to matched brushless motors and executes real-time torque or velocity commands from higher-level PLCs. Its role in industrial automation is to translate reference signals into controlled shaft motion, linking motion sequencing software to electromechanical drive hardware. The controller is intended for applications that require coordinated motor response under closed-loop control.

In continuous duty, the controller delivers a sustained phase current of 7.5 A and a continuous output power of 2.2 kW when supplied from a 240 VAC three-phase line. Motion commands arrive as a differential ±10 V analog signal, and the internal torque and velocity regulator holds positional accuracy to ±22 arcmin. Sinusoidal drive waveforms are generated at a carrier frequency of 20 kHz, and the inverter is optimized for motors rated at 3000 rpm. The magnetic circuit has 12.0 mH of line-to-line inductance, and it can maintain 2.5 Nm of torque without overheating. The housing measures 211.8 mm in length and 108.0 mm in width, the shipping weight is 16 lb, and closed-loop resolver conversion is processed at 12-bit resolution.

During transients, the drive furnishes a peak line current of 15 A and can momentarily supply 4.5 kW of mechanical power for acceleration events. The motor shaft can be driven up to a peak torque of 6.7 Nm, giving additional headroom during short load surges. Position feedback is accepted through an encoder emulator that reproduces resolver data as a quadrature stream with an effective resolution of 1024 ppr. This feedback arrangement allows external controllers to monitor motion without an additional converter.