Product Description:

The SC722A-001-PM72008 is a servo controller manufactured by Pacific Scientific within the SC720 Command Controllers series. Classified within the 720 Series architecture, it acts as a torque and velocity regulator for brushless servo axes on packaging lines, pick-and-place stations, and coordinated gantries. By combining drive power conversion with resolver feedback processing, the unit links the three-phase 240 Vac bus to the motor while presenting encoder-level position information to the supervisory PLC.

This controller draws a three-phase supply current of 4.5 Arms and delivers a continuous phase current of 3.8 A to the load, while the output can reach 7.5 A during acceleration. With these currents, the unit supplies 1.1 kW of continuous mechanical power at the motor shaft. Velocity commands are provided as a bipolar ±10 V analog reference, and current is switched at 20 kHz PWM to minimize torque ripple. A resolver-to-digital converter with 12-bit resolution feeds an encoder emulator that outputs 1024 ppr quadrature pulses so existing motion controllers can close position loops. Control personality is loaded through an analog module that tailors loop gains to the connected machine.

Dynamic energy created during rapid deceleration is routed to an internal shunt resistor that can dissipate 20 W continuously and momentarily absorb 3 kW, protecting the DC link without external braking hardware. Closed-loop speed accuracy is held within ±22 arcmin, a level suitable for precision indexing tables. Fault conditions are reported through a 3-bit open-collector port, and the front-panel monitor jack scales real-time phase current at 0.63 V per amp. The unit itself weighs 13 lbs, allowing cabinet installation without additional supports, and all functions remain accessible through the 720 Series front-panel diagnostics.