HDS03.2-W100N-HS91-01-FW

HDS Drive Controllers

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The HDS03.2-W100N-HS91-01-FW is a modular drive controller manufactured by Bosch Rexroth Indramat and assigned to the HDS Drive Controllers series. In multi-axis cabinets it governs individual servo drives, coordinating torque, speed, and position loops while relaying process data to the automation layer. By fitting into the DIAX04 rack alongside matching power supplies and feedback modules, the unit streamlines axis control in packaging, material-handling, and machining cells.

The controller exchanges real-time commands through the SERCOS fiber-optic interface, so parameter updates and diagnostic telegrams travel over a deterministic serial ring. A continuous output capability of 100 A lets the module energize medium-to-high power motors without external boosters, and a built-in internal air blower guides cabinet air across the heat sink to keep semiconductor temperatures inside permissible limits. Its architecture follows the DIAX04 family design, meaning mounting holes, bus bars, and firmware routines align with other members of that platform for straightforward system expansion. Factory support is provided directly by Bosch Rexroth Indramat, ensuring spare parts and service utilities match the original hardware release.

Within the HDS Drive Controllers series this unit carries firmware and hardware identified as version 2, giving it motion algorithms and parameter maps that differ from earlier revisions but remain compatible with the same backplane voltage rails. The product code denotes Line 03, indicating third-generation electronics that accept higher bus frequencies and improved error logging compared with earlier lines. Alternative assemblies are not cataloged; the “Other Versions” field explicitly states None, so retrofit planning can proceed without cross-checking multiple variant tables. These attributes let integrators assign the controller to synchronized spindle axes or interpolated gantries while maintaining uniform cooling demands and fieldbus timing across the entire DIAX04 stack.

Technical Specifications

Command Communication Interface
SERCOS

Controller Family
DIAX04

Cooling Method
Built-in Internal Air Blower

Line
03

Other Versions
None

Product Type
HDS Drive Controller

Rated Current
100 A

Version
2

Frequently Asked Questions

What is special about the Bosch Rexroth Indramat HDS03.2-W100N-HS91-01-FW’s handling of continuous current at high switching frequencies?

At 8 kHz switching frequency its continuous current drops (for similar 100A drives) to around ~35A, meaning at high speeds the thermal load and switching losses increase significantly. Thus for high-speed or high-frequency applications, derate the motor current or ensure excellent cooling.

How should the cooling be managed when installing this drive in a control cabinet?

The internal blower must have unobstructed airflow, and cabinet design should avoid condensate or humid air; fans should run even when the machine is off until temperature equalizes to avoid condensation risks.

What are the safety or shutdown triggers related to temperature in these drives?

There are built-in overtemp warnings and shutdowns for the motor and the amplifier heatsink; e.g. if the heatsink exceeds its limit or internal blower fails, the drive will reduce output or shut down to protect itself.

How does insulation class C affect installation and maintenance?

Insulation class C means the drive can tolerate higher internal insulation temperatures (up to ~140-155°C or more depending on motor), but still requires attention to ambient temperature, ventilation, and heat dissipation to avoid long-term degradation.

In what real-world automation scenarios is a 100A rated DIAX04 series drive particularly advantageous?

In applications with high inertia loads—e.g. robotic arms, large machine tools, printing or packaging equipment—where large torque and rapid acceleration are required, the 100A rating gives headroom; also in systems needing regeneration or braking, the power handling helps

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Internal Product Review

The HDS03.2-W100N-HS91-01-FW, by Bosch Rexroth Indramat, is a drive controller designed for high-efficiency operation. It features a 100 A rated current and utilizes SERCOS communication for seamless integration with the DIAX04 controller family. This product is ideal for use in automation, robotics, and CNC machinery where precise control and cooling are essential.