KDA 3.1-050-3-DYS-U1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-050-3-DYS-U1 is a spindle drive from the KDA Spindle Drives series, with a rated current of 50 Amps and a DC supply voltage of 300 VDC. It uses forced cooling via a mounted heatsink blower powered by a 115V AC source and supports operation in ambient temperatures from 5 to 45 degrees Celsius. The drive features a serial RS 232 C interface and a digital 16-bit parallel speed command value, with a second encoder input and synchronous input.
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Product Description:
The KDA 3.1-050-3-DYS-U1 is a modular spindle drive produced by Bosch Rexroth Indramat for the KDA Spindle Drives series. It converts regulated DC bus energy into controlled three-phase output for high-speed motorized spindles used in CNC machining centers and other automated machine tools. The drive works with Indramat supply modules and motion controllers, providing closed-loop speed regulation and torque delivery for milling, drilling, and grinding axes. Its modular format also supports installation in cabinet-based drive systems where the spindle axis must operate with coordinated machine motion.
Internally, the power section is designed for a DC link of 300 VDC, and the inverter can deliver a continuous phase current of 50 A to the spindle motor. Heat from the power semiconductors is removed through a mounted heat sink ventilated by an auxiliary blower powered by 115 V at 50/60 Hz. This arrangement provides forced cooling, which helps maintain stable operating temperatures during extended high-speed cutting cycles. The command circuit receives the target velocity over a 16-bit digital parallel channel. Parameter access and diagnostic communication are available through a front-panel RS-232C serial interface.
For correct operation, the drive must be installed where the ambient temperature stays within 5 °C to 45 °C. The installation altitude must not exceed 1000 m. If either limit is exceeded, the permissible current is reduced or additional cooling is required. Feedback capability is enhanced by a second encoder input with a synchronous input, which allows the controller to compare spindle position data from two sources or align spindle orientation with external events. These feedback paths support accurate spindle coordination during orientation, speed matching, and timing-dependent machine sequences.
Frequently Asked Questions about KDA 3.1-050-3-DYS-U1:
Q: What is the rated current capacity of the KDA 3.1-050-3-DYS-U1 spindle drive?
A: The KDA 3.1-050-3-DYS-U1 supports a rated current of 50 A for spindle operation.
Q: What is the AC power requirement for the heatsink blower on this drive?
A: This model requires 115V AC at 50-60Hz for powering its heatsink blower.
Q: How is the KDA 3.1-050-3-DYS-U1 spindle drive cooled during use?
A: Forced cooling is provided by a mounted heatsink blower on this drive.
Q: What does the second encoder input of the KDA 3.1-050-3-DYS-U1 support?
A: The second encoder input allows for both additional encoder and synchronous signal connections.
Q: What type of interface does the KDA 3.1-050-3-DYS-U1 use for speed command input?
A: A digital 16-bit parallel interface is used to provide the speed command value for this unit.
