KDA 2.1-100-3-L0I-W1 Bosch Rexroth Indramat
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
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.
Internal Product Review
The KDA 2.1-100-3-L0I-W1 spindle drive from Bosch Rexroth Indramat delivers impressive performance with a rated current of 100 A and operates on a 300 VDC supply voltage. Forced cooling is ensured by a mounted heatsink blower, with an AC source of 220V/50-60Hz. This model stands out for reliable spindle control and integration flexibility with SERCOS interface and incremental encoder output.
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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.
