Model Code Definition

DKR = DIAX02 High-power single-axis spindle drive series

02 = DIAX Second-generation hardware platform

.1 = Hardware version Release1

W = Built-in axial flow fan for forced air cooling

300 = Rated continuous output current 300Amps

N = No built-in internal brake chopper (Requires external braking resistor)

BE = SERCOS Fiber Bus Numerical Control Master Control Model

37 = Mid-range multi-functional SERCOS motherboard: Dual feedback interface + Extended IO reserve + Basic C-axis indexing + Simple electronic gear, functions superior to BE11, less than full-function BE79

01 = First-generation factory standard hardware configuration; without - FW suffix = Without pre-burned firmware card Technical Specifications

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

DC Bus Rated Voltage: 700VDC

Output Rating: Continuous 300A RMS; 250% overload can last for 300ms, instantaneous 300% peak overload; Maximum output frequency 1200Hz, compatible with spindle maximum power ≈ 93kW; Carrier 4kHz/8kHz selectable (8kHz reduced to 110A output)

Braking Structure: N-type without built-in discharge chopping circuit, all regenerative power consumed by external braking resistors

Cooling: Built-in fan for forced cooling, total system loss ≈ 1810W

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

Ambient Condition: Full-load operation: 0~+45℃ (overheating automatically reduces power); Storage: -30~+85℃; Altitude ≤1000m; Environmental humidity <90% without condensation

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

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

SERCOS Bus: BE37 is standardly equipped with fiber optic SERCOS real-time bus, receiving CNC speed/torque/position commands

Feedback Interface: Dual 15-pin D-SUB feedback ports, supporting Resolver resolver + TTL incremental encoder dual-channel independent feedback (BE11 has only a single channel, BE37 has a dual-channel option)

Onboard IO: Built-in 16DI/10DO fixed digital IO, U2/U3/U4 reserved slots can be selected for expansion of feedback and positioning modules

Debug Port: Front-mounted RS232 debugging serial port, used for IndraWorks parameter debugging, fault reading, and firmware flashing

Auxiliary Terminals: Drive enable, hardware emergency stop, motor overheating protection, fault relay passive contacts, drive ready status terminal block

FW Slot: Front-mounted independent slot on the body, for later installation of DSM firmware storage card Core Functions

Three-loop closed-loop (position / speed / torque) spindle control; BE37 compared to BE11 upgrade: supports simple C-axis indexing positioning, single group electronic gear synchronization, dual encoder switching, does not support multi-axis linkage and multi-extension module of BE79; Full-link hardware protection: overcurrent, bus over/under voltage, power module overheating, fan failure, feedback break, front-mounted digital tube fault code display; The entire machine must be equipped with the corresponding DSM firmware card + matching spindle firmware before it can be powered on and operated. Application Fields

Machine tool with simple C-axis function, main spindle for offset printing, main spindle for small and medium-sized metallurgical winding and unwinding, renovation of imported equipment (requiring indexing but without multi-axis electronic gear linkage conditions). Operation & Maintenance Instructions

Only connected to a three-phase 400~480V industrial power supply, single-phase power supply directly triggers the bus undervoltage lockout mechanism, with no output.

The cabinet body is reserved with a ≥100mm ventilation gap on top and bottom to ensure the smoothness of the fan duct and avoid capacity reduction due to high temperature and overheating shutdown.

N-type without an internal braking chopper: Frequent start-stop / emergency braking conditions must be equipped with the original factory specification external braking resistor to prevent bus overvoltage alarm and shutdown.

Empty slot models cannot be started without a bare machine. It is necessary to purchase the BE37-specific DSM storage card separately and write the corresponding motor firmware through IndraWorks.

The main control hardware of BE37, BE11, and BE79 cannot be directly interchanged and replaced. Maintenance and replacement must strictly check the board card model suffix.