Product Description:

The SC723A001 is a servo controller built by Pacific Scientific and delivered within the SC720 Command Controllers series. Designed for the 720 Series motion architecture, the module accepts host commands and drives three-phase brushless motors while supervising torque and velocity in real time. By converting low-level reference signals into regulated phase currents, it provides a closed-loop interface between the machine PLC and the motor for applications such as indexing tables, pick-and-place actuators, and packaging spindles that require precise dynamic response.

At a 240 Vac three-phase supply, the controller draws a bus current of 9 A rms and can deliver a continuous phase output of 7.5 A to the motor windings. This current supports a sustained mechanical output of 2.2 kW, while the internal DC bus is maintained at 320 Vdc. For rapid modulation, the power section switches at an output ripple carrier frequency of 20 kHz, which keeps audible noise low and allows fine current resolution. A Hall-isolated monitor provides 0.32 V for every ampere of current, allowing drive status to be viewed on analog test equipment. Motion feedback is handled by a 1024 ppr resolver-to-digital encoder emulator processed through 12-bit RDC logic, keeping the command signal aligned with the ±10 V velocity reference without additional scaling.

System margins for transient events are wider than the continuous ratings. Under the same 240 Vac supply, the controller can reach a peak electrical output of 4.5 kW at a phase surge of 15 A. When powered from 120 Vac, the internal link settles at 160 Vdc, preserving the torque loop at a reduced top speed. Regenerated energy is dissipated in an integral shunt network that handles 40 W continuously and up to 6 kW during braking spikes. Overall positioning error is held within ±22 arcmin, and the sealed chassis weighs 16 lb for panel installation.