Product Description:

Pacific Scientific manufactures the SC723A-001-PM72008 as part of the SC720 Command Controllers series. The module functions as a torque/velocity servo controller, directing power devices to match speed or torque references in automated assembly lines, packaging stations, and material-handling axes. It accepts resolver feedback, can emulate an incremental encoder, and maintains positional accuracy to ±22 arc-minutes, giving repeatable endpoint performance within normal machine tolerances.

The command interface accepts an analog reference of ±10 V, allowing the host PLC to scale bidirectional speed or torque requests without digital conversion overhead. Internally, the power stage delivers a continuous motor phase current of 7.5 A, which supports sustained torque during steady production. For fast indexing or acceleration, the same stage can produce 15 A briefly, giving extra headroom before thermal limits intervene. With a three-phase 240 V AC supply, the controller outputs 2.2 kW of continuous mechanical power while the bus capacitors are charged to 320 V DC; this elevated DC level minimizes ripple and supports higher servo bandwidth.

The energy reserve extends to 4.5 kW in short bursts, so intermittent peaks such as cutter engagement or rapid deceleration do not cause voltage collapse. Position data passed to the downstream drive can be synthesized at 1024 ppr, enabling legacy incremental inputs to read clean quadrature signals even though the primary sensor is a resolver with an internal 12-bit conversion. Thermal design keeps semiconductor junctions below rating when ambient air is at or under 50 °C at full load; beyond that point, derating or external cooling is required. A shunt network rated at 40 W continuous and 6 kW peak dissipates regenerated energy to guard the bus against overvoltage trips.