CACR-SR03BE13S-E is a 0.3kW original Yaskawa AC Servopack of CACR-SR series, designed to work with Yasnac CNC systems for feed axis control of traditional CNC lathes and small machining centers. Original mass production has been terminated, and this unit is mainly used as replacement spare part for equipment maintenance. It is compatible with Yaskawa USAM and USAF 300W incremental encoder servo motors. The suffix E stands for export standard specification of the S-type control board.

CACR is the general series code for Yaskawa AC servo amplifier. SR represents basic speed control platform supporting speed, position and torque control through internal parameter setting. 03 means rated output power of 0.3kW. BE refers to 200V grade main power board with exclusive internal power circuit layout. 13 stands for 13-pin dedicated circular aviation connector for encoder connection. S indicates customized control board with factory preset fixed parameters, and E denotes export standard configuration without special OEM locked programs.

Main power supply is three-phase AC 200V~230V with voltage tolerance +10%/-15% and frequency of 50Hz or 60Hz. The control circuit uses independent single-phase AC 200~230V power input. Rated continuous output current is 3.0Arms, and instantaneous peak overload current reaches 8.5Arms for short-time acceleration and deceleration. Operating ambient temperature ranges from 0℃ to 55℃, storage temperature from -20℃ to 85℃, and working humidity shall not exceed 80%RH without condensation. With IP20 protection grade, it can only be installed inside control cabinet and must avoid environments with corrosive gas, excessive dust and oil mist. IGBT sine-wave PWM driving technology is adopted.

Three optional control modes including speed control, position control and torque control are available. Compared with non-export customized versions, the E specification reserves more adjustable parameter ranges according to international export standard, while partial core parameters are pre-set for S-version matching requirements. The control board is equipped with optimized anti-interference circuit to guarantee stable encoder signal transmission under complicated industrial electromagnetic environment.Complete protection functions cover overcurrent, overvoltage, undervoltage, overheat, regenerative circuit abnormality, encoder signal loss and CPU abnormal shutdown protection. Single seven-segment digital display on front panel shows real-time operating status and numeric fault codes. Terminals P and N are reserved for external regenerative braking resistor wiring.

R, S, T terminals connect three-phase input power source; U, V, W terminals connect three-phase wiring of matched servo motor; PE terminal must be reliably connected to equipment protective ground complying with local electrical safety codes; P and N terminals are used for external brake resistor connection.Control terminals receive ±10VDC analog command signal from CNC controller, with digital input terminals for servo enable and fault reset signals and dry-contact relay output for external fault alarm feedback. A dedicated 13-core round aviation connector is configured for encoder wiring following S-E version pin definition.

Mount the servo unit vertically inside electrical cabinet and reserve enough top and bottom clearance for heat dissipation, keeping away from heat-generating components such as transformers and contactors. Check all power and control wiring thoroughly before power-on to prevent short circuit. Standard preset parameters for S-E version enable direct replacement without massive parameter modification. Complete no-load jog test to confirm motor rotation direction and running stability before connecting mechanical load.

Cut off total input power and wait more than 10 minutes for internal capacitor residual high voltage discharge before any maintenance work to prevent electric shock hazard. Clean cooling ventilation slots and tighten terminal screws every quarter regularly. Once alarm code appears, check input power stability, motor mechanical jamming, loose 13-pin encoder cable and poor cabinet heat dissipation in sequence, and do not restart the drive repeatedly until hidden faults are eliminated.