KDA 3.1-100-3-LP0-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-100-3-LP0-U1 is part of the KDA Spindle Drives series and operates with a 300 VDC supply voltage and a rated current of 100 Amps. Designed with forced cooling via a mounted heatsink blower, it supports an ambient temperature range of 5 to 45 degrees Celsius and includes a second encoder input for spindle or motor feedback.
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Product Description:
The KDA 3.1-100-3-LP0-U1 spindle drive is built by Bosch Rexroth Indramat for the KDA Spindle Drives series. As a spindle drive, it converts DC link energy into controlled three-phase power that governs tool rotation in CNC machines and other automated machining centers. The third-generation hardware platform fits the Indramat modular rack, giving builders a scalable way to add spindle axes while maintaining a consistent cabinet layout and wiring scheme. This arrangement helps the drive regulate spindle speed during drilling, milling, and turning operations that require stable rotary motion.
The drive is linked to a common bus that supplies 300 VDC, and it can deliver up to 100 A of continuous output to the spindle motor. Heat from this current is expelled by a mounted heat sink blower powered from a dedicated 115 V/50–60 Hz source, with airflow directed across the fins under forced cooling. Speed references arrive digitally over the SERCOS interface, giving the controller deterministic cycle times for threading, contour cutting, and surface finishing. Digital command transfer also helps reduce signal noise in cabinets that contain multiple power modules. The control electronics monitor bus voltage, phase current, and blower operation to keep component temperatures within safe limits, and the hardware layout excludes extra communication boards to simplify cabinet routing.
The unit operates from 5 to 45 °C and at heights up to 1000 m above sea level without derating. A no additional interface option designation confirms that only the base communication port is installed, while a second encoder input for spindle feedback or additional motor feedback provides high-resolution position data. This extra feedback channel supports applications that require spindle orientation or tighter speed verification. The mounted blower and forced-air tunnel support stable operation when the cabinet contains adjacent drives. Mechanical dimensions and wiring conventions mirror the rest of the KDA family, which supports uniform integration in modular drive cabinets.
Frequently Asked Questions about KDA 3.1-100-3-LP0-U1:
Q: What is the rated current of the KDA 3.1-100-3-LP0-U1 spindle drive?
A: This model provides a rated current of 100 A for high-demand spindle applications.
Q: How is the KDA 3.1-100-3-LP0-U1 spindle drive cooled?
A: The KDA 3.1-100-3-LP0-U1 uses a mounted heatsink blower for forced cooling.
Q: What is the required AC power for the heatsink blower on this spindle drive?
A: The AC source for the heatsink blower requires 115V at 50–60 Hz.
Q: Does the KDA 3.1-100-3-LP0-U1 include a second encoder input?
A: A second encoder input is included for spindle feedback or additional motor feedback.
Q: What interface is used for speed command value input on the KDA 3.1-100-3-LP0-U1?
A: The speed command value is provided via the SERCOS interface for precise control.