KDA 2.1-150-3-L0I-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 2.1-150-3-L0I-W1 is a spindle drive from the KDA Spindle Drives series with a rated current of 150 Amps and a DC supply voltage of 300 V. It features an incremental encoder output, SERCOS speed command interface, and uses forced cooling with a mounted heatsink blower. The drive operates within an ambient temperature range of 5 to 45 degrees Celsius and is suitable for installations up to 1000 meters above sea level.
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Product Description:
The KDA 2.1-150-3-L0I-W1 is a spindle drive built by Bosch Rexroth Indramat for the KDA Spindle Drives series. As a spindle-oriented power module, it converts DC-link energy from a common rectifier into controlled three-phase output for high-speed machine tool motors. Within an automation cell, it works with a position controller to regulate spindle speed so cutting, drilling, or grinding spindles can follow programmed velocity profiles without overshoot. This arrangement supports stable speed control during demanding machining processes where repeatable spindle behavior is required.
The power section operates from a DC bus of 300 VDC and can deliver a continuous motor phase current of 150 A. An integral heat sink blower uses an auxiliary supply of 220 V 50-60 Hz to move air across the fin pack and remove switching losses. Reliable operation is permitted at ambient temperatures from 5 to 45 °C, allowing cabinet installation without refrigerated cooling. The installation altitude should not exceed 1000 m above sea level, because reduced air density above that height lowers cooling effectiveness and requires derating. These operating limits should be observed whenever the drive is used in enclosed machine cabinets or similar industrial installations.
The thermal management hardware includes a mounted heat sink blower that operates with forced cooling, so airflow remains independent of spindle load and helps keep semiconductor junction temperatures within allowable limits. Speed commands are transmitted through the SERCOS interface, which supports digital integration with multi-axis control systems used in machine tools. Actual speed can be retransmitted through the incremental encoder output to support feed-forward functions or diagnostic monitoring during operation. Because the drive does not include a second encoder input, any feedback redundancy must be handled by the higher-level control system. This communication and cooling arrangement suits spindle applications that require consistent response, continuous airflow, and digital command exchange.
Frequently Asked Questions about KDA 2.1-150-3-L0I-W1:
Q: What is the rated current of the KDA 2.1-150-3-L0I-W1 spindle drive?
A: The KDA 2.1-150-3-L0I-W1 provides a rated current of 150 A for spindle drive operations.
Q: How is the KDA 2.1-150-3-L0I-W1 spindle drive cooled?
A: This model utilizes a mounted heatsink blower for forced cooling.
Q: What AC source is required for the heatsink blower of the KDA 2.1-150-3-L0I-W1?
A: The KDA 2.1-150-3-L0I-W1 accepts a 220V, 50-60Hz AC source for its heatsink blower.
Q: What type of speed command interface does the KDA 2.1-150-3-L0I-W1 support?
A: A SERCOS interface is used to deliver the speed command value on this drive.
Q: Does the KDA 2.1-150-3-L0I-W1 include an incremental encoder output?
A: The KDA 2.1-150-3-L0I-W1 comes equipped with an incremental encoder output.
