Product Description:

The SC726A-001-PM72013 is a servo controller manufactured by Pacific Scientific within the SC720 Command Controllers series. Identified in the manufacturer’s catalog as part of the 720 Series, it is a torque/velocity controller that receives a velocity command of ±10 V and modulates three-phase motor windings to regulate motion in industrial machinery. A resolver-based encoder emulator works with a 12-bit RDC to provide position data, and the speed reference channel maintains an accuracy of ±22 arcmin, making the unit suitable for material-handling, packaging, and indexing applications.

Electrically, the controller draws a bus current of 38 Arms from a 240 Vac, 3-phase supply and rectifies it to a DC bus of 320 Vdc. From this rail it can deliver a continuous output current of 60 A, translating to a sustained shaft power of 18 kW at the rated speed. The pulse-width-modulation bridge operates at 20 kHz, which keeps current ripple low and minimizes acoustic noise. At the rated motor speed of 2000 rpm, the 1024-ppr encoder feedback allows tight velocity loops. A three-bit status line reports fault conditions to the system controller, and the encoder emulator lets the unit mirror incremental feedback for legacy interfaces.

When transient loads rise, the power stage supports a peak output current of 120 A and a momentary mechanical power of 36 kW. This reserve is coupled to torque values that range from a continuous 300 lb-in, through a continuous stall torque of 451 lb-in, up to a peak rated torque of 720 lb-in and a peak stall torque of 800 lb-in. The controller packages these capabilities in an enclosure that weighs 90 lbs, yet remains compact enough for panel installation. Such performance margins let machine builders extend motion profiles without exceeding component limits, supporting reliable service life under aggressive duty cycles.