Product Description:

The SC723A-001-PM72012 belongs to the SC720 Command Controllers series manufactured by Pacific Scientific. As a servo controller, it issues torque and velocity commands to brushless motors and manages DC-bus energy within multi-axis automation cells. The unit provides closed-loop regulation of motor speed and position, enabling repeatable motion profiles in packaging lines, pick-and-place modules, and other industrial machines that rely on precise servo coordination.

On a 240 Vac three-phase supply, the controller draws a bus current of 9 Arms while developing a continuous output power of 2.2 kW. Continuous phase current is limited to 7.5 A, and the internal bus is maintained at 160 Vdc when fed from 120 Vac or at 320 Vdc when fed from 240 Vac, allowing the same hardware to operate on either mains level. The current-monitor test point produces 0.32 V/A, so drive loading can be checked with a standard voltmeter. Resolver feedback is digitized at 12-bit RDC resolution, while the ±10 V velocity input accepts speed references from external motion controllers. Application accuracy is ±22 arc-minutes.

For transient moves, the drive can deliver a peak power of 4.5 kW with up to 15 A phase current, and excess regenerative energy is absorbed by the shunt circuit that dissipates 40 W continuously or 6 kW for short durations. Pulse-width modulation runs at 20 kHz, pushing switching noise above most audible ranges while keeping motor current ripple low. An internal encoder emulator generates a quadrature stream of 1024 ppr, allowing legacy PLCs to read position without an added transducer. Command computation is handled by the torque and velocity control core used in the 720 Series, and the fully enclosed chassis weighs 16 lbs.