USAGED-09A21S is a discontinued medium-size permanent magnet AC servo motor of Yaskawa USAGED series, designed to cooperate with CACR-SR30 series VS800 servo amplifiers for small and medium CNC lathes, bench machining centers and automated precision positioning equipment. It adopts fully enclosed natural self-cooling structure and integrates built-in DC24V power-off electromagnetic brake; the suffix S stands for factory-fixed customized encoder and connector specification matching designated servo drives. The motor is developed for frequent start-stop cyclic operation and vertical-axis anti-drop positioning applications requiring reliable brake holding performance.

USAGED is Yaskawa fully enclosed self-cooled servo motor base series code; numeric 09 refers to 0.85kW rated power specification; letter A means standard general internal structure and universal incremental encoder layout; first digit 2 represents solid output shaft with standard built-in keyway; second digit 1 stands for fixed rear dual plug wiring structure for power and encoder cables; suffix S indicates OEM fixed encoder pin definition and built-in electromagnetic brake configuration.

The motor supports three-phase AC200V~230V, 50/60Hz industrial power input. Continuous rated output power is 0.85kW with full-load rated operating current of 6.2A, fixed rated speed at 1500rpm and continuous rated torque of 5.39Nm. Instantaneous peak overload torque can reach three times the rated torque within short acceleration period to handle heavy startup and sudden load impact.Built-in electromagnetic brake is driven by independent DC24V power supply, which releases the output shaft when energized and locks the shaft automatically once power is cut off to avoid vertical axis sliding. It is equipped with UTOPI series differential line-drive incremental encoder with fixed pin assignment defined by suffix S; the encoder signal matches designated CACR-SR30 servo packs, and non-custom standard drives may fail closed-loop control without parameter adjustment or firmware modification. Stator winding uses Class F insulation to ensure stable insulation performance during long-time continuous full-load operation.

Whole motor housing features IP50 protection grade and relies on casing natural convection heat dissipation without extra external cooling fan. Output shaft is keyed solid shaft for rigid coupling with ball screw or reducer; extra rear brake housing increases overall axial length compared with non-brake counterparts. The net weight of the motor is approximately 5.1kg with standard flange mounting dimension for direct machine installation.Allowable operating ambient temperature ranges from 0℃ to +40℃; storage temperature is between -20℃ and +70℃. Working relative humidity is controlled at 5%~80%RH with no internal condensation inside casing. Derate continuous load output when installation altitude exceeds 1000 meters above sea level to prevent overheat damage. The unit withstands vibration of 10Hz~55Hz with amplitude below 0.5mm; environments with corrosive gas, heavy dust or continuous liquid splashing are forbidden.

This motor mainly matches Yaskawa CACR-SR30 series servo amplifiers including standard and partial Y-suffix customized locked firmware drives. Two control command modes are available via matched driver: ±10VDC analog speed instruction and differential pulse position command transmitted from external CNC controller to realize speed adjustment and precision positioning. Thanks to built-in brake design, no additional external mechanical locking fixture is needed for vertical installation axes for power-off anti-drop protection.

Internal winding temperature sensor feeds overheat signal to matched servo drive to trigger automatic overload protection. Common abnormal conditions correspond to unified VS800 servo fault codes: encoder wire breakage triggers fault No.6, long-term continuous overload activates fault No.7, winding short-circuit overcurrent leads to fault No.1. Abnormal open or short of brake coil will also induce auxiliary abnormal warning on the servo unit. Internal circuit is fitted with surge suppression components to enhance anti-interference against industrial power fluctuation and electromagnetic disturbance.

Direct replacement needs identical USAGED-09A21S original motor; non-brake variants or different connector specification models cannot substitute directly unless paired servo drive completes parameter reset or dedicated firmware rewrite. Before disassembly for bearing, brake or encoder maintenance, cut off all main power and brake DC power, wait at least 15 minutes for full discharge of servo internal DC bus capacitor to avoid electric shock hazard.Periodic maintenance includes checking tightness of wiring terminals every three months, refilling bearing lubricating grease after every 8000 running hours and cleaning casing dust every half year. Arbitrary modification of encoder pin definition or brake wiring will cause motor runaway and permanent servo alarm lock.

It is widely used for X/Y/Z feed axes of small-medium CNC lathes, table-top vertical machining centers and automatic feeding equipment, especially preferred for vertical installation positions that need power-off brake holding to prevent axis falling under medium-load cyclic start-stop and high-precision positioning working conditions.