Model Code Definition

DKR = DIAX02 single high-current spindle driver series

02 = 2nd-gen DIAX hardware platform

.1 = Hardware Revision V1

W = Built-in axial fan forced air cooling

300 = Continuous rated output current 300Arms

N = No onboard internal brake bleeder chopper（external brake resistor mandatory）

BE = SERCOS fiber optic CNC digital control mainboard series

56 = Advanced multi-function SERCOS motherboard: triple feedback interface, full continuous C-axis positioning, multi-group electronic gear synchronization, expanded onboard IO, reserved multi-option module slots; richer functions than BE37, partial reserved expansion space vs fully loaded BE79

01 = Original first edition PCB hardware layout; no -FW suffix = empty DSM memory slot, factory no preloaded firmware

Technical Specifications

Main Power Input：3Φ AC400~480V ±10%,50/60Hz；isolated single-phase AC230V/200VA auxiliary control supply

DC Bus nominal voltage：700VDC

Output Rating：Continuous 300A RMS；250% overload sustain 300ms,300% instantaneous peak overload；max output frequency1200Hz,matched max spindle power≈93kW；switching freq selectable4kHz/8kHz（derate to110A@8kHz carrier）

Braking Configuration：N-type without internal bleeder, all regenerative power must dissipate via external braking resistor

Cooling：Built-in cabinet blower forced convection, total power loss≈1830W

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

Ambient Operation：Full-load 0~+45℃(automatic current derate above 45℃);storage -30~+85℃;altitude≤1000m;RH＜90% non-condensing

Dimension&Net Weight：H1060×W462×D390mm,net≈60.8kg

Interface & Communication Configuration

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

SERCOS Channel：Standard fiber SERCOS real-time bus for CNC motion command transmission

Feedback Port：Triple 15pin D-SUB feedback connectors,supports resolver + TTL incremental + sine/cosine encoder three independent feedback access（BE11 single-channel/BE37 dual-channel limited）

Onboard IO：20DI/14DO expanded fixed digital IO;U2/U3/U4 spare slots for optional DSS/DZF extension positioning modules

Debug Port：Front RS232 serial for IndraWorks parameter setting,fault diagnosis,firmware download

Auxiliary Terminal Strip：Drive enable,E-stop,motor PTC thermal protection,fault relay dry contact,drive ready status signal terminals

FW Slot：Independent front vacant slot for later installation of dedicated DSM firmware memory card

Core Functions

Full three-loop(speed/torque/position) closed-loop spindle regulation; BE56 core advantages over BE37: full continuous C-axis rotary positioning, multi-group independent electronic gearing linkage, triple encoder switching closed-loop, rigid tapping with high precision, spindle orientation at arbitrary angle; partial expansion slot reserve, unable to mount full multi-axis expansion modules as BE79 version. Complete hardware fault protection: overcurrent, DC bus over/undervoltage, IGBT overtemperature, fan malfunction, feedback signal loss, front LED numeric fault code display; cannot power on without matched BE56 DSM firmware card and programmed spindle software.

Application Fields

High-precision vertical/horizontal machining center with full C-axis turning-milling composite function, high-grade gravure printing main spindle drive, precise metallurgy multi-drum winding equipment, high-end imported compound machine tool spindle retrofit projects.

Operation & Maintenance Instructions

Only connect standard three-phase AC400~480V industrial mains; single-phase input triggers DC bus undervoltage lockout with zero output.

Reserve ≥100mm top/bottom ventilation clearance inside control cabinet to guarantee fan airflow, avoid overheat shutdown or automatic current derating.

N-type no built-in brake chopper: configure matched external braking resistor for frequent deceleration/emergency stop to prevent DC bus overvoltage trip.

Empty slot model cannot run standalone; purchase exclusive BE56 DSM card and flash dedicated firmware via IndraWorks before commissioning; BE11/BE37/BE56/BE79 mainboards are hardware non-interchangeable.

Spare part replacement must confirm suffix -01 hardware version to prevent mismatch of IO definition and feedback pin assignment.