Product Description:

The SC723B001 is a servo controller manufactured by Pacific Scientific for the SC720 Command Controllers series and identified internally under the 720 Series naming convention. Designed for closed-loop automation, it interfaces with a resolver or encoder feedback source, regulates motor torque or speed, and delivers calibrated three-phase power to brushless servomotors used on conveyors, pick-and-place axes, or packaging lines. This controller bridges PLC-level commands to field actuators with deterministic response.

The power section is designed around a DC bus that sits at 320 Vdc when the unit is fed from a 240 Vac, three-phase source. Under that supply, it draws up to 9 Arms and can deliver a continuous motor phase current of 7.5 A with a peak capability of 15 A for acceleration events. Continuous shaft power reaches 2.2 kW, while 4.5 kW is available momentarily to overcome load inertia. A 20 kHz PWM carrier minimizes current ripple and acoustic noise. Excess regenerated energy is handled by an internal shunt circuit that can absorb 6 kW in short bursts. The controller itself weighs 16 lbs, which simplifies panel layout.

Position fidelity is aided by a resolver-based encoder emulator that reports 4096 ppr feedback into the motion network; with that resolution, the drive supports mechanical speeds to 3000 rpm while holding system accuracy within ±4 arc-min. An analog velocity input of ±10 V lets external controllers command torque or speed directly, and the internal monitor output scales motor current at 0.32 V/A for real-time diagnostics. The servo loop computes with 14-bit RDC data and operates as a torque and velocity controller, so tuning can be optimized for dynamic loads. For braking energy that exceeds the DC link threshold, the shunt can continuously dissipate 40 W, extending component life during cyclical duty.