DKR02.1-W200N-BA04-01-FW | Bosch Rexroth Indramat DIAX02 Spindle Servo Drive
June 04, 2026

DKR02.1-W200N-BA04-01-FW | Bosch Rexroth Indramat DIAX02 Spindle Servo Drive

Product Overview The DIAX02 series high-power grid feedback type spindle servo features grid energy feedback (without built-in braking chopper, different from B which has a built-in discharge type). The U1 slot is pre-installed with the BA04 analog control board. The FW comes with the DSM02.3 plug-in firmware card and the entire machine is equipped with an axial flow fan for air cooling. It is compatible with 2AD/ADF AC spindles, 1MB frameless spindles, LAF/LSF linear motors. It is commonly used with old-fashioned ±10V analog numerical control systems and is often used as the main drive for old CNC machines and rotary printing.

Description

Model Code Definition

DKR = DIAX02 spindle drive product line

02 = DIAX second-generation hardware platform

.1 = Hardware version Rev.1

W200 = Continuous rated output 200 Arms, W = Cabinet-mounted fan forced air cooling

N = Regenerative mains feedback, braking energy fed back to the grid, no internal integrated braking discharge circuit, external braking resistors are required to achieve energy consumption braking

BA = Analog Command Board, ±10V analog quantity command control board

04 = Board configuration code: compatible with rotary transformer + 1Vpp sine wave incremental encoder dual-channel feedback, spindle C-axis positioning hardware configuration

01 = Factory hardware configuration version

FW = Preinstalled removable DSM02.3 firmware module, firmware independent card, the entire machine parameters are stored in the firmware module Technical Specifications

Power Input: 3-phase AC 400~480V ±10%, 50/60Hz; Isolated DC 24V auxiliary control power supply

DC bus rated voltage: 700VDC

Output specifications: Continuous 200A, 250% overload for 300ms, 300% peak short-time for 800ms; Maximum output frequency 1200Hz, matching motor rated power 42~45kW

Braking method: N-type full energy grid feedback, no-load/light-load deceleration directly returns energy to the grid; Heavy-load emergency stop requires external external braking resistor

Cooling: Integrated built-in fan for heat dissipation, total power consumption approximately 1750W

Protection level: IP20 cabinet for vertical installation

Environmental parameters: Full load 0~45℃, 55℃ reduced capacity operation; Storage -35~+85℃, altitude ≤1000m, humidity <90% no condensation

Dimensions: H1000×W440×D290mm, net weight ≈104kg Interface & Communication Configuration

Power terminals: High-power connection terminals L1/L2/L3 for incoming lines, U/V/W for motor three-phase output

Command interface (BA04 board): X2 terminal ±10V analog speed command, 0~±10V torque setting, standard old-style numerical control system analog signal connection

Feedback interface: Dual 15-pin D-SUB, one shaft position interface, one 1Vpp sine wave incremental encoder interface (exclusive hardware for BA04)

Slot layout: U1 fixed installation for BA04 analog board, U5 pre-installed FW firmware card, U2/U3/U4 reserved I/O/encoder expansion slots

Debug port: Front RS232 serial port, IndraWorks software parameter reading and writing, firmware upgrade

General I/O: Drive enable, hardware emergency stop, motor temperature control / brake monitoring, fault passive contact output, driver ready signal feedback terminals X6/X7 Core Functions

Three-loop closed-loop (position / speed / torque) fully digital control, standard equipped with machine spindle functions: wide constant power speed regulation, rigid tapping, C-axis indexing and orientation; N-type grid power feedback for energy saving; no large amount of heat accumulation during continuous braking conditions; full-dimensional fault protection: overcurrent, bus over/under voltage, power device overheating, feedback break, fan failure LED code alarm; FW firmware can be migrated parameters by removing the card alone, the same model driver can be directly replaced by inserting a new card for production without the need to re-tune motor parameters. Application Fields

Old horizontal / vertical machining centers, offset rotary printing machines, heavy-duty textile winding equipment, old forging machine main drive, upgrading and retrofitting the main drive of imported old equipment. Operation & Maintenance Instructions

Only connect to a three-phase 400~480V industrial power supply. Single-phase power supply is prohibited. Continuous bus undervoltage alarm for single-phase input and inability to achieve full power output.

The cabinet body is reserved with a minimum of 80mm ventilation space on top and bottom to ensure the air intake and exhaust of the fan and avoid overheating and capacity reduction shutdown.

Model N has no built-in chopper: normal start and stop rely on grid feedback. Frequent large inertia emergency stop must be equipped with a large-power external braking resistor; otherwise, the bus will trip due to overvoltage.

Debugging is only compatible with the DSM02.3 firmware version of the IndraWorks software. The firmware of the BA simulation board and the BE series SERCOS optical fiber firmware cannot be mixed and used interchangeably.

Equipment replacement of spare parts: directly transplant the original FW firmware card, and restore the original parameters of the equipment with one click.


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