Model Code Definition

DKR = Exclusive spindle drive lineup under DIAX02 platform

02 = 2nd generation DIAX hardware platform

.1 = Hardware revision version 1

W = Built-in cabinet axial fan forced convection cooling structure

300 = Continuous rated output current: 300Arms

B = Internal integrated brake chopper with embedded bleeder resistance for regular dynamic deceleration energy dissipation

BE = SERCOS fiber optic digital bus control board for CNC digital command transmission via optical fiber

23 = Board configuration specification: Sine-wave incremental encoder + resolver dual feedback hardware, integrated dedicated circuit for C-axis positioning, rigid tapping and high-precision electronic gearing synchronization

01 = Factory fixed standard hardware configuration version

(No FW suffix = Without factory pre-installed pluggable firmware memory card)

Technical Specifications

Input Main Supply: 3Φ AC400~480V ±10%, 50/60Hz; isolated DC24V auxiliary control power input

Nominal DC Bus Voltage: 700VDC

Output Performance: Continuous rated 300A RMS; 250% overload sustain for 300ms, 300% instantaneous peak overload; max output frequency 1200Hz, matched for 55~93kW rated spindle motors; switching frequency optional 4kHz /8kHz (continuous output derates to 141A@4kHz,110A@8kHz)

Braking Parameter: B-type built-in bleeder with continuous regenerative power approx.43kW; conventional deceleration via internal heat dissipation, external high-power braking resistor mandatory only for frequent heavy-inertia emergency braking scenarios

Cooling Mode: Built-in blower forced air cooling, total internal power loss approx.1800W

Protection Class: IP20 complying with IEC standard, vertical cabinet installation only

Ambient Operating Condition: Full-load operating temperature 0~+45℃, automatic output derating above +45℃; storage temperature -30~+85℃; mounting altitude ≤1000m; relative humidity＜90% non-condensing

Dimension & Weight: H1065×W468×D392mm, net weight ≈59.9kg

Interface & Communication Configuration

Power Terminals: Heavy-duty L1/L2/L3 three-phase mains input terminals, U/V/W high-current motor power output terminals

Command Interface(BE23): Full digital SERCOS fiber bus, optical fiber linking with upper CNC controller for speed/torque setpoint delivery

Feedback Connectors: Dual independent 15pin D-SUB ports separately for sine-wave encoder and resolver feedback signals (unique BE23 dedicated layout)

Slot Layout: U1 fixed slot pre-mounted BE23 SERCOS mainboard; U2/U3/U4 vacant spare slots for optional digital I/O or extended feedback modules

Debug Port: Front panel RS232 serial port for IndraWorks parameter setting, fault troubleshooting and firmware upgrade

General I/O Terminals: Drive enable input, hardware emergency stop, motor thermal protection signal, spindle brake interlock, fault dry-contact relay output, drive ready status output terminals

Card Slot Reserve: Empty dedicated front slot for optional aftermarket FW pluggable memory card installation

Core Functions

Full digital triple closed-loop control (position/speed/torque) optimized for heavy spindle applications, featuring wide constant-power speed range, embedded standard C-axis indexing positioning, rigid tapping and electronic gear synchronization functions in base firmware. Onboard B-type brake chopper cuts peripheral wiring workload under normal deceleration working conditions. Complete multi-layer fault protection covering overcurrent, DC bus over/undervoltage, power module overtemperature, feedback signal loss and cooling fan malfunction, with front LED indicator for coded fault display. Supports optional FW memory card expansion for full parameter backup and cross-drive data migration.

Application Fields

Large vertical & horizontal CNC machining center main spindle drive unit, heavy gravure rotary printing main transmission, high-power industrial textile winding spindle, forging metallurgy main drive and obsolete heavy machine tool CNC renovation projects.

Operation & Maintenance Instructions

Only connect with rated three-phase AC400~480V industrial mains; single-phase incoming supply triggers persistent DC bus undervoltage fault and cuts full-load output.

Maintain minimum 100mm upper and lower ventilation clearance inside control cabinet to guarantee blower airflow and avoid over-temperature triggered output derating shutdown.

B-version with built-in bleeder: internal resistance satisfies regular load deceleration; install external high-power braking resistor for frequent heavy inertia emergency stop to prevent DC bus overvoltage tripping.

Parameter commissioning requires matching SERCOS-edition IndraWorks software; BE-series SERCOS control board firmware cannot be interchanged with BA analog control board firmware.

For spare drive replacement: install optional FW memory card to back up full parameters from original unit before replacement for one-click parameter recovery.