TDA 1.1-050-3-A00 Bosch Rexroth Indramat
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MPN: R911243728
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The TDA 1.1-050-3-A00 is a main spindle controller produced by Bosch Rexroth Indramat as part of the TDA Main Spindle Controllers series. It features a rated current of 50 Amps and a continuous current of 35 Amps, with a DC link voltage of 300 VDC. The controller uses air cooling inside the control cabinet, has a maximum ambient temperature of 55 °C, and weighs 10.5 kilograms.
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Product Description:
The TDA 1.1-050-3-A00 is a main spindle controller produced by Bosch Rexroth Indramat within the TDA Main Spindle Controllers series. Designed for machine tools and other motion platforms, the unit converts drive commands from a higher-level CNC or PLC into controlled three-phase motor power. It supervises motor feedback, reports faults, and maintains thermal limits as the link between supply modules and high-speed spindle motors in automated production cells. This type of controller is used where stable spindle speed and a consistent response to load changes are required during cutting, drilling, and similar operations.
During continuous operation, the controller can deliver 35 A to the spindle, while its peak current reaches 50 A to support acceleration phases. Energy is stored on a shared DC bus at 300 VDC, so the intermediate circuit must match this voltage level. Internal logic circuits draw 160 mA from the ±15 V supply, and the relay stage requires 1.2 A from the 24 V service line. Cooling uses an air-inside-control-cabinet arrangement, so forced ventilation of the rack is necessary. The unit is mounted vertically, weighs 10.5 kg, and has no additional encoder or fieldbus interface, which keeps external wiring limited to power, command, and diagnostic lines. The vertical mounting position also supports upward airflow through the cabinet, which helps remove heat from the controller and nearby modules.
The enclosure has an IP10 protection rating and a Humidity Class F designation, so the controller must stay in a clean, dry cabinet. Reliable operation is maintained up to 55 °C ambient and at installation heights not exceeding 1000 m; hotter or higher locations may require supplemental cooling or derating. Speed reference enters through an Analog ±10 V line on the X4 9-pin connector, allowing straightforward integration with analog motion cards while the drive scales the signal for its control loop. This analog input allows the spindle command to be generated by simple control hardware when a digital motion network is not used.
