Model Code Definition

DKR = DIAX02 dedicated high-current spindle driver series

02 = 2nd generation DIAX hardware platform

.1 = Hardware revision version 1

W = Built-in cabinet axial fan forced convection cooling

300 = Continuous rated output current 300Arms

B = Embedded internal bleeder brake chopper with built-in discharge resistance

BE = SERCOS fiber-optic digital CNC bus mainboard

79 = Premium composite dual-board configuration (DSS02.1M+DZF03.1M stacked structure): four-channel mixed feedback input + expandable modular IO architecture + enhanced multi-master electronic gearing + redundant spindle safety monitoring + extended C-axis high-precision indexing logic; core difference vs BE23/BE32/BE37: stacked dual mainboard design supports later pluggable extension function cards on vacant U2/U3/U4 slots

01 = Standard factory fixed hardware configuration

No FW suffix = Empty dedicated front memory slot, no factory preloaded firmware card

Technical Specifications

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

Nominal DC Bus Voltage:700VDC

Output Parameter:Continuous rated 300A RMS; 250% overload sustain 300ms,300% instantaneous peak overload; max output frequency1200Hz, matching max 93kW spindle motor; optional switching frequency 4kHz/8kHz (derate to141A@4kHz,110A@8kHz)

Braking Performance:B-type built-in bleeder continuous power ~43kW; external high-power braking resistor mandatory for frequent heavy inertia emergency stop

Cooling Mode:Built-in blower forced air cooling, total internal power loss≈1820W

Protection Grade:IP20(IEC standard), vertical cabinet exclusive installation

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

Dimension & Weight:H1065×W468×D392mm, net weight≈60.2kg

Interface & Communication Configuration

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

Command Interface(BE79):Full digital SERCOS fiber bus, optical fiber linking upper CNC controller for speed/torque closed-loop command

Feedback Ports:Four independent 15pin D-SUB connectors supporting sine incremental encoder/resolver/HTL pulse/TTL encoder four kinds of mixed feedback (unique four-channel design of BE79)

IO Layout:Base fixed 18DI/14DO onboard IO; U2/U3/U4 spare empty slots for optional aftermarket extension IO/feedback modules (expandable via plug-in option cards)

Slot Distribution:U1 fixed pre-installed BE79 stacked DSS+DZF composite mainboard; U2/U3/U4 reserved for optional extension cards

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

Auxiliary Terminals:Drive enable, hardware E-stop, motor thermal protection, spindle brake interlock, fault dry-contact relay output, drive ready status terminals

FW Card Slot:Independent vacant front slot for optional pluggable firmware memory card installation

Core Functions

Full digital three-loop closed-loop control (position/speed/torque) optimized for redundant heavy-duty spindle working condition; embedded enhanced rigid tapping, multi-spindle electronic synchronization, redundant feedback fault switchover function, C-axis arbitrary angle indexing positioning. BE79 stacked dual-board architecture reserves unlimited extension space for special customized control requirements; complete multi-layer protection covering overcurrent, DC bus over/undervoltage, power module overtemperature, feedback loss, cooling fan failure with front coded LED fault indication; optional FW memory card realizes full parameter backup and cross-drive one-click data copy during replacement.

Application Fields

Extra-large heavy horizontal/vertical CNC machining center main spindle unit, multi-spindle compound machining equipment, high-power gravure rotary printing main drive, heavy metallurgy winding spindle, high-end textile precision winding equipment and large imported legacy machine tool CNC renovation project.

Operation & Maintenance Instructions

Only access rated three-phase AC400~480V industrial mains; single-phase input triggers permanent DC bus undervoltage fault and drive output lockout.

Keep ≥100mm upper/lower ventilation clearance inside control cabinet to guarantee blower airflow and avoid overheating derating or shutdown.

Built-in B-type bleeder satisfies conventional regular deceleration; configure external high-power braking resistor for frequent heavy-load emergency braking to prevent DC bus overvoltage tripping.

Parameter commissioning needs matching SERCOS version IndraWorks software; BE79 stacked dual-board firmware cannot be interchanged with single-board BE series programs.

Drive replacement preparation: Purchase separate FW memory card to backup original full parameters before swapping for rapid parameter recovery without repeated motor auto-tuning; extension option cards need cross-check slot definition before migration from old unit.