Product Description:

The HDS03.2-W075N-HS73-01-FW is a drive controller manufactured by Bosch Rexroth Indramat as part of the HDS Drive Controllers series. Mounted in a common power rack, it supplies controlled power to one servo channel and relays operating status back to the machine control. By processing encoder signals and issuing pulse-width-modulated voltage to the motor windings, the unit provides closed-loop torque, speed, and position regulation for automated machining, printing, and conveying equipment. It can adjust current delivery as load conditions change, helping the connected motor hold commanded speed and position through demanding motion cycles.

For system communication the controller employs SERCOS, a real-time serial interface that runs over a fiber-optic ring. This arrangement delivers cyclic command and feedback data while providing electrical isolation between drives and the CNC or PLC. Because the communication path is optical, the link is less affected by electrical noise inside large multi-axis cabinets. During continuous operation the power stage can supply up to 75 A of motor current, making it suitable for medium-torque axes such as spindle orientation or large gantry slides. A built-in air blower directs cabinet air across the heat sink and power semiconductors to maintain thermal limits without external ducting. The device is released as Version 2.

The unit belongs to the DIAX04 controller family, allowing it to share backplane connectors and auxiliary modules with other drive cards in the same assembly. Within that family it is categorized as Line 03, which sets its mechanical height, connector pitch, and slot coding so modules are installed in the correct positions. Shared rack architecture also keeps control and power modules arranged in a consistent format within the drive system. Its product classification as an HDS Drive Controller confirms that the board integrates both control logic and a power output stage. That layout eliminates the need for a separate external amplifier when pairing it with Rexroth synchronous or asynchronous servo motors.