Product Description:

The BLII-D7575A is a servo drive produced by Okuma as part of the BL Servo Drives series. Designed for dual-axis applications, the unit supplies regulated power to paired servomotors and exchanges position and velocity data with the host CNC so that each axis can be controlled in a closed loop during cutting, positioning, or auxiliary machine functions within automated cells. By integrating power electronics and monitoring circuits, it simplifies cabinet layouts and supports compact installation in production equipment.

Each output channel is rated at 75/75 A, so the drive can deliver high surge current to start or decelerate heavy rotary axes without saturation. A dedicated DC bus is fed through a 3-phase 200 V main circuit, while logic and gating components draw from a separate 1-phase 100 V control supply; this split input arrangement helps limit noise coupled into feedback lines. The BLII-D7575A is built for a machine configuration that uses 2 axes and communicates with Okuma 5020 and 7000 controls over the standard drive link. Internal switching is handled by insulated-gate bipolar transistors rated for 75 A, 600 V, providing fast switching and reduced conduction loss. The enclosure operates reliably at relative humidity up to 75%, maintaining output stability under typical plant moisture levels.

The input rectifier section carries a diode assembly rated for 50 A, 800 V, and an overcurrent monitor trips when demand rises above more than 150% of the limit current to help prevent semiconductor damage. Motion feedback can be viewed through the analog speed monitor, where ±10 V = ±3750 rpm provides a direct voltage-to-speed reference for observing axis speed. For mechanical durability, the drive is qualified for vibration up to 0.5 G, helping maintain stable contact integrity during nearby machining shocks. These operating characteristics suit the unit for high-current dual-axis service in CNC machine environments.