KDA 3.1-050-3-L00-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-050-3-L00-U1 is a spindle drive in the KDA Spindle Drives series. It features forced cooling with a mounted heatsink blower running on 115V AC, and operates at a rated current of 50 Amps with a 300 VDC supply voltage. The drive supports SERCOS interface for speed command value and is designed for ambient temperatures from 5 to 45 degrees Celsius, up to 1000 meters elevation.
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Product Description:
The KDA 3.1-050-3-L00-U1 is a spindle drive module manufactured by Bosch Rexroth Indramat within the KDA Spindle Drives series. Designed for machine-tool main spindles, the unit converts regulated DC power from an external source into three-phase motor power while coordinating speed and torque through digital control links. In automated production lines, the drive supports rapid speed changes and stable torque delivery for precision cutting, drilling, and grinding operations. This type of application often requires smooth transitions between acceleration, cutting speed, and deceleration, and the drive is intended to support that pattern of spindle operation.
It operates from a DC bus of 300 VDC and can deliver a continuous phase current of 50 A to a connected spindle motor. Thermal management uses a mounted heatsink blower that pushes air across the aluminum fins to provide forced cooling during operation. The blower is powered by 115 V/50-60 Hz auxiliary mains, which keeps fan supply separate from the DC link. The hardware has no additional interface option and no second encoder input, so command and status communication stays on the standard SERCOS interface. This arrangement supports steady heat removal during long machining cycles and helps the power section maintain motor current under continuous load.
Operation is permitted in ambient temperatures from 5 to 45 °C and at installation altitudes up to 1000 m. Within that range, the SERCOS interface provides cycle-synchronous command updates between the CNC and the drive processor, helping the spindle respond consistently as machining loads change. The electronics are in Series 3, which identifies the product generation used for this module. The operating window fits typical industrial control cabinets where spindle demand can vary throughout a machining cycle and stable control response is required.
Frequently Asked Questions about KDA 3.1-050-3-L00-U1:
Q: What type of speed command interface does the KDA 3.1-050-3-L00-U1 spindle drive support?
A: The KDA 3.1-050-3-L00-U1 supports a speed command value through the SERCOS interface.
Q: What is the rated current for the KDA 3.1-050-3-L00-U1 spindle drive?
A: This spindle drive operates with a rated current of 50 A, allowing it to handle demanding applications.
Q: How is the KDA 3.1-050-3-L00-U1 spindle drive cooled?
A: Its cooling is managed by a mounted heatsink blower with forced cooling to maintain optimal temperature.
Q: What DC supply voltage is required by the KDA 3.1-050-3-L00-U1 spindle drive?
A: The KDA 3.1-050-3-L00-U1 requires a DC supply voltage of 300 VDC for proper operation.
Q: What is the ambient temperature operating range for the KDA 3.1-050-3-L00-U1 spindle drive?
A: This model is designed to operate at ambient temperatures ranging from 5 to 45 degrees Celsius.
