R911256090
The R911256090 (RAC 3.5-100-460-A00-W1-220) is a main spindle drive controller developed by Bosch Rexroth Indramat. Designed for managing the 1MB and 2AD series motors, this unit provides continuous power between 10 to 30kW at the output shaft. With a series code of 3 and a design code of 1, this controller assures extensive speed range and an internal position control loop. This attribute allows the spindle to position independently, contributing to C-axis operations with high precision. A fan-cooling mechanism is integrated into the device, along with a programming module. Remarkably, the rotor position can be accurately recognized due to the controller's high resolution capabilities.
The R911256090 (RAC 3.5-100-460-A00-W1-220) controller is fashioned to be housed within a control cabinet, equipped with a built-in heatsink serving both the fan and power electronics. The X3 connector is utilized for motor feedback interfacing, powered by a rated supply voltage of 3 x 380 to 460V and a regulated frequency of 50/60Hz. The device operates optimally within a temperature range of 5°C and 45°C, boasting a continuous current rating of 70A. The unit is constructed according to the DIN VDE 0160 specification and designed with air slits on its lid for heat emission. Maintenance of the heatsink and air shaft condition is critical to prevent overheating during operation.
