KDA 2.1-100-3-L0I-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 2.1-100-3-L0I-W1 is part of the KDA Spindle Drives series. This spindle drive has a rated current of 100 Amps and operates with a DC supply voltage of 300 VDC. It features forced cooling through a mounted heatsink blower and supports speed command via SERCOS Interface.
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Product Description:
The KDA 2.1-100-3-L0I-W1 belongs to the KDA Spindle Drives series manufactured by Bosch Rexroth Indramat. It is a drive for spindle applications that converts digital speed commands from motion controllers into controlled three-phase power for high-speed machine-tool motors. Within an automation cell, the unit sits between a regulated DC bus and the motor, providing current regulation, feedback handling, and thermal management. This control structure lets the spindle accelerate, decelerate, and hold speed accurately during machining cycles. The unit also supports smooth speed correction during transient load changes.
Electrical operation centers on a DC bus of 300 VDC; this voltage supplies the power stage that synthesizes the three-phase output. The current regulators are rated for a continuous output of 100 A, allowing the drive to support medium-to-large spindle motors during sustained operation. An internal logic board receives velocity references over the SERCOS interface and converts the digital setpoints into a PWM pattern for the inverter section. To remove the heat generated at this current level, the housing uses forced cooling through a mounted heat sink. The blower is powered from a dedicated 220 V AC 50–60 Hz source, which keeps the cooling supply electrically isolated from the DC link. This arrangement separates the fan supply from the main power path and supports continuous airflow during extended spindle duty. The drive is Series 2.
The cooling assembly uses a Mounted Heatsink Blower that directs airflow across the heat-dissipating surfaces during continuous spindle duty. The drive can be installed up to 1000 m above sea level and operates in ambient temperatures from 5 to 45 °C. For feedback forwarding, the controller provides an incremental encoder output for downstream position or speed monitoring. A secondary encoder input is not available, so any additional feedback channel must be handled externally by the surrounding control system. Adequate clearance around the heat sink is still necessary so the blower can move air effectively.
Frequently Asked Questions about KDA 2.1-100-3-L0I-W1:
Q: What is the rated current of the KDA 2.1-100-3-L0I-W1 spindle drive?
A: The KDA 2.1-100-3-L0I-W1 spindle drive provides a rated current of 100 A for high-capacity spindle operations.
Q: What interface is used for speed command input on the KDA 2.1-100-3-L0I-W1?
A: This spindle drive uses a SERCOS interface for receiving its speed command value.
Q: How is the KDA 2.1-100-3-L0I-W1 spindle drive cooled?
A: The cooling for the KDA 2.1-100-3-L0I-W1 is managed by a mounted heatsink blower with forced cooling.
Q: What power supply is required for the heatsink blower on the KDA 2.1-100-3-L0I-W1?
A: The AC source for the heatsink blower is 220V at 50 to 60 Hz.
Q: What is the maximum installation elevation for the KDA 2.1-100-3-L0I-W1?
A: This spindle drive can be installed at elevations up to 1000 meters above sea level.
