TDA 1.1-050-3-A0I Bosch Rexroth Indramat
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MPN: R911249536
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The Bosch Rexroth Indramat TDA 1.1-050-3-A0I is part of the TDA Main Spindle Controllers series and has a rated current of 50 Amps with a continuous current of 35 Amps. It operates at a DC link voltage of 300 VDC and supports an incremental encoder output interface. The controller features IP10 protection, weighs 10.5 kilograms, and is designed for maximum ambient temperatures up to 45 degrees Celsius.
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Product Description:
The TDA 1.1-050-3-A0I is a main spindle controller built by Bosch Rexroth Indramat for the TDA Main Spindle Controllers series. The unit conditions drive power and position feedback so that high-speed machine-tool spindles can be started, ramped, and held precisely during cutting or grinding cycles. By translating analog velocity references into controlled three-phase output, it links CNC command levels to the electromechanical demands of an induction or synchronous spindle motor.
The power section delivers up to 50 A and can sustain 35 A continuously; these current limits set the thermal load that cabinet ventilation must remove. Internal capacitors operate from a DC-link potential of 300 VDC, allowing the inverter bridge to modulate a wide speed range. A ±24 V logic rail draws 1.2 A from the control bus, isolating signal electronics from the power stage. Velocity references enter as a differential analog ±10 V signal, and actual speed is returned over an incremental encoder channel. No secondary encoder input is fitted, so a single feedback loop closes the servo. Protection is limited to IP10, making enclosure mounting mandatory, and the assembly weighs 10.5 kg, which affects panel load calculations.
Environmental service limits begin with an upper operating temperature of +45 °C; derated operation is allowed to +55 °C if continuous current is reduced. The controller may be started at ambient temperatures down to +5 °C and stored between -30 °C and +85 °C without internal damage. Reliable performance is maintained below a ceiling altitude of 1000 m and at a maximum mean relative humidity of 70 %, provided condensation is avoided. The cooling system must account for these limits, and cold starts may require cabinet heating while storage areas must remain dry.
