Model Code Definition

DKR：Independent cabinet high-power spindle driver of DIAX series

03：3rd-gen DIAX03 hardware platform

.1：Main power board hardware revision V1

W：Built-in axial fan forced convection cooling

200：Continuous rated output current 200Arms

N：No internal brake bleeder circuit, external brake resistor required

BE：SERCOS fiber digital bus control board (pure fiber bus command, no default ±10V analog speed input)

31：Expandable SERCOS control mainboard with multi U-slot expansion capability, customizable via optional plug-in modules

01：Control board hardware revision V01

Technical Specifications

Input Power：3Φ AC400~480V ±10% 50/60Hz; independent single-phase AC230V auxiliary control power (200VA)

Nominal DC Bus：700VDC

Output Rating：Continuous 200A RMS; 250% overload sustain 300ms, 300% instantaneous peak overload; max output frequency 1600Hz, match ~62kW Indramat 2AD/ADF/1MB spindle motor; default PWM 4kHz, optional 8kHz with partial output derate

Brake Setting：Zero internal bleeder circuit, external high-power braking resistor required for all deceleration/regenerative operation

Cooling：Integrated cabinet blower, total power loss ~1370W

Protection Class：IP20 per EN60529, vertical cabinet-only mounting

Ambient Working：0~+45℃ full-load continuous operation, automatic current derate above 45℃; storage -30~+85℃; altitude ≤1000m; RH＜90% non-condensing

Dimension & Weight：H822×W350×D353mm, net approx 49.0kg

Compatible Motors：Indramat 1MB frameless spindle, 2AD/ADF AC spindle, LAF/LSF linear synchronous servo motors

Interface & Communication Configuration

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

Bus Interface：Dual IN/OUT SERCOS fiber optic ports for multi-axis daisy-chain ring bus layout, no onboard analog ±10V speed command terminal

Feedback Port：1×15Pin D-SUB connector, compatible with resolver, TTL incremental encoder, sine/cosine high-resolution encoder signal

Onboard IO：Base fixed 8DI/4DO digital terminal; reserved U1/U2/U3/U4/U5 five expansion slots for custom IO, positioning or fieldbus optional plug-in modules (core difference vs BE23 fixed IO design)

Debug Port：Front-panel RS232 serial port (9600/19200 baud), for IndraWorks parameter tuning, fault diagnosis and parameter backup

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

DSM Slot：Front vacant memory card slot, no factory pre-installed firmware DSM card on non-FW variant

Core Functions

Full current-speed-position triple closed-loop digital control via SERCOS real-time fiber bus; BE31 base function includes spindle constant-speed control, C-axis positioning, rigid tapping; expand advanced functions (electronic gearing, multi-segment electronic cam) by installing corresponding optional plug-in modules into U slots; complete protective functions: overcurrent, DC bus over/undervoltage, IGBT overheat, fan malfunction, feedback cable break, front LED digital fault code display; non-FW blank slot unit cannot startup directly after power-on, must install matched programmed DSM card and download dedicated ESM03 firmware via IndraWorks software.

Application Fields

Modular-configurable high-end 5-axis CNC machining center SERCOS spindle, multi-station synchronous printing & packaging production line main spindle, customized special-purpose CNC equipment with expandable peripheral IO requirement, old analog CNC digital upgrade transformation project needing post-expansion function customization.

Operation & Maintenance Instructions

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

Reserve ≥90mm upper/lower cabinet ventilation clearance to avoid insufficient blower cooling leading to overheat protection shutdown and output derating.

N-type no internal bleeder design: matched external braking resistor must be configured regardless of continuous or intermittent stop mode.

BE31 expandable mainboard cannot be directly interchanged with BE11/BE12/BE23 fixed-spec control board, mismatched hardware causes IO failure or axis abnormal motion.

Non-FW version: preserve original DSM parameter backup during maintenance; replacement DSM requires full firmware rewrite via IndraWorks to match original program version.