CACR-PRA5AD3NR is an original Yaskawa R-series SERVOPACK AC servo driver under classic CACR product family, specially designed for precise position closed-loop control and matched with 50W small-size Yaskawa AC servo motors. It belongs to legacy Yasnac servo system, rated for three-phase AC200V input power supply and 0.05kW output power, adopting standard rack-mounted modular structure to install inside control cabinet with compact overall layout. This model has been discontinued in original mass production and is mainly used for maintenance replacement of old automation equipment, precision testing platforms and miniature transmission equipment on production lines.

CACR represents Yaskawa classic AC servo drive series; PRA stands for R-series positioning control type with pulse command input; numeral 5 refers to 50W rated output power specification; AD means AC200V input voltage grade and internal hardware circuit version; digit 3 defines encoder matching protocol for incremental feedback; NR denotes standard configuration without built-in dynamic braking unit and customized terminal wiring layout.

The driver accepts wide-range three-phase AC 170V~230V industrial power input, supporting standard pulse position command from upper controller, including differential pulse and single-ended pulse input modes. It matches incremental encoder feedback signal from paired small-power servo motor to realize full closed-loop speed and position control. Rated continuous output current matches 50W servo motor standard parameter, with built-in overcurrent, overvoltage, overload, overheat and encoder disconnection multi-protection functions to cut off power output immediately once abnormal status occurs. Working ambient temperature ranges from 0℃ to 40℃, applicable for general factory workshop environment with relative humidity below 80% and no condensation condition.

This servo driver applies rack plug-in installation design, which can be fixed on standard cabinet guide rail or equipment rack conveniently for centralized arrangement with other control modules. Separate dedicated connectors are reserved for main power input, motor power output and encoder signal connection respectively, separating power circuit and signal circuit to effectively reduce electromagnetic interference during operation. Compact body size helps save cabinet inner space, and indicator lamps on front panel display power status, running status and fault alarm code intuitively for on-site troubleshooting and daily inspection.

Thanks to mature analog-digital hybrid control circuit design, the driver runs stably at low speed with minor speed fluctuation and outstanding positioning accuracy for tiny-load precision transmission. Complete multi-layer protection mechanism improves operation reliability and reduces unexpected downtime of legacy equipment. It is widely applied in old-type small automated feeding equipment, precision instrument positioning mechanism, miniature indexing machinery, semiconductor auxiliary conveying device and textile fine processing equipment, serving as replacement spare part for original damaged drivers of in-service legacy automation production lines.