KDA 3.1-050-3-L0S-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-050-3-L0S-U1 is a spindle drive from the KDA Spindle Drives series and has a rated current of 50 Amps. It features forced cooling with a mounted heatsink blower that operates at 115V and 50-60Hz. The device supports a DC supply voltage of 300 VDC and includes a serial interface (RS 232 C) for connectivity.
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Product Description:
The KDA 3.1-050-3-L0S-U1 belongs to the KDA Spindle Drives series produced by Bosch Rexroth Indramat. It is a spindle drive intended to regulate high-speed motor spindles on machining centers and similar automated equipment, translating digital speed commands into controlled three-phase power. This type of control supports stable spindle operation during drilling, milling, and other speed-sensitive machining tasks. By combining power conversion, closed-loop regulation, and dedicated blower cooling in one unit, the drive simplifies cabinet integration for machine builders.
The power section is rated for 50 A of continuous output current while drawing bus power from a 300 VDC supply, allowing it to support substantial spindle loads without derating. Speed references reach the control electronics through the SERCOS interface, enabling deterministic cycle synchronization with other axes in coordinated machine motion. Internal thermal management relies on forced cooling, and the heat sink is actively ventilated by a blower supplied from an auxiliary line rated at 115 V/50-60 Hz. This dedicated airflow helps stabilize semiconductor temperatures during prolonged duty and supports consistent operation when enclosure temperatures rise.
The drive operates in ambient temperatures from 5 to 45 °C and at installation sites up to 1000 m above sea level without derating. Service and diagnostic tools connect through a built-in RS-232C serial port, which provides a direct path for local parameter access and status checks. A second encoder channel is omitted to simplify wiring in applications that use only the primary spindle sensor, which can reduce unnecessary signal routing inside the cabinet. Heat removal is further supported by a mounted heat sink blower, which is factory installed so the specified blower voltage can be supplied directly.
Frequently Asked Questions about KDA 3.1-050-3-L0S-U1:
Q: What is the rated current supported by the KDA 3.1-050-3-L0S-U1 spindle drive?
A: The KDA 3.1-050-3-L0S-U1 operates with a rated current of 50 A.
Q: What cooling method is used for the KDA 3.1-050-3-L0S-U1 spindle drive?
A: The cooling for this model is provided by a mounted heatsink blower utilizing forced cooling.
Q: What is the DC supply voltage required for the KDA 3.1-050-3-L0S-U1?
A: This model accepts a DC supply voltage of 300 VDC.
Q: What additional interface does the KDA 3.1-050-3-L0S-U1 spindle drive provide?
A: The KDA 3.1-050-3-L0S-U1 includes a serial interface (RS 232 C) as an additional communication option.
Q: What is the permissible ambient temperature range for operating the KDA 3.1-050-3-L0S-U1?
A: The spindle drive is designed to operate in ambient temperatures between 5 and 45 degrees Celsius.
