Product Description:

The TDA 1.1-050-3-D00 main spindle controller is produced by Bosch Rexroth Indramat within the TDA Main Spindle Controllers series. It converts incoming supply power into a regulated three-phase output that CNC or PLC systems use to command spindle speed, torque, and rotation direction with repeatable accuracy. The device supports cutting, milling, and grinding operations that require tight rotational control, and its slim format allows dense packing in multi-axis electrical cabinets where space is limited. It also integrates with standard Indramat drives to form coordinated axis groups.

The controller’s rated output capacity reaches 50 A, which is the maximum current it can deliver to the motor during full-load machining. For extended duty cycles, it carries a continuous effective current of 35 A without exceeding thermal limits. Energy is buffered on an internal DC link at 300 VDC, supporting rapid speed ramps and regeneration into the supply. Command references arrive over a 16-bit parallel digital bus, allowing numerical controls to write binary speed words directly to the drive. A housing classification of IP 10 indicates open ventilation, so the unit must be mounted inside a protected cabinet and kept free from conductive dust.

An auxiliary +15 V rail draws 160 mA for internal diagnostics, while the 24 V control bus draws 1.2 A when relays and status LEDs are active. Operation is permitted between +5 °C and +45 °C, with short-term tolerance up to +55 °C; above this point, derating is necessary. The drive maintains full performance up to 1000 m of altitude, after which reduced air density affects cooling. No additional encoder or communication interface is fitted, so feedback handling must come from the main automation controller. During storage, the electronics can withstand -30 °C to +85 °C. A width of 52.5 mm, depth of 355 mm, and height of 390 mm help the unit fit existing spindle drive bays.