SIEB & MEYER 21.44.03 KG0398 Axis Control Board

Module Feature

SIEB & MEYER 21.44.03 KG0398 is a plug-in digital servo axis control board. It acts as the motion calculation core of single-axis servo system and cooperates with SIEB & MEYER power modules. It collects encoder feedback signals, runs position, speed and torque closed-loop control algorithm. It supports analog and digital command input and real-time bus communication. Equipped with watchdog monitoring and multi-channel fault detection. Compact rack plug-in structure with reliable EMC performance. Widely used in CNC machine tools, semiconductor processing equipment and precision automation production lines.

Working principle

The control board receives motion command from upper-level controller. It reads the rotor position and speed feedback from motor encoder, performs high-speed closed-loop calculation, and outputs reference control signal to matched power module. It continuously monitors the working state of the power stage. When faults are detected, it immediately blocks the drive output and sends fault code to the host system to protect motor and mechanical equipment.

Onboard components

DSP main processor, FPGA logic chip, encoder signal processing circuit, analog acquisition circuit, fieldbus interface circuit, watchdog circuit, backplane gold finger connector, status LED array.

LED indicators

Built-in LED indicators for power status, board ready, servo enable, communication status and fault code indication.

Hardware self-diagnosis

Visual inspection of PCB, connectors and backplane pins; power supply voltage measurement; encoder cable continuity test; read LED fault codes; check PCB for corrosion or burn marks; verify bus communication connection.

Programming software

SIEB & MEYER commissioning software for axis parameter configuration, servo gain tuning, status monitoring and fault log reading.

Electrical & Process Parameters

Model: 21.44.03 KG0398 Input voltage: DC24V Control mode: Position / Speed / Torque Command interface: Fieldbus / Analog / Pulse command Signal: Encoder feedback Cooling: Natural convection cooling Protection: Watchdog, encoder loss, communication fault, overvoltage monitoring Mounting: Rack plug-in mounting

Mechanical & Structure

Mounting: Rack plug-in mounting Protection class: IP20 (inside control cabinet)

Environmental

Operating temperature: 0℃ ~ +50℃ Ambient humidity: 5~95% non-condensing Certification: CE compliant Status: SIEB & MEYER servo axis control board

System compatibility

Compatible with SIEB & MEYER series servo power modules, forms complete single-axis servo drive system for CNC and semiconductor motion control.

Function

21.44.03 KG0398 axis control board manufactured by SIEB & MEYER. It receives motion instructions from upper system, executes closed-loop servo calculation and sends control signals to power module to realize high-precision motor positioning. Faults such as encoder loss, communication interruption and watchdog trigger will shut down servo and trigger alarm. It is the core control card of SIEB & MEYER servo drive system.

Installation

Follow lockout/tagout safety procedure before installation. Cut off all rack power completely. Insert the board into the designated rack slot, lock the board handle and confirm backplane contact. Connect encoder cable and control signal cable correctly. Download axis parameters and tune servo gains via SIEB & MEYER commissioning software, perform trial run before formal operation.

Interface

DC24V power pin, encoder signal connector, fieldbus port, analog/pulse command terminal, backplane bus connector, fault output terminal of 21.44.03 KG0398.

Diagnostic

No power LED: Missing DC24V supply or blown onboard fuse. Board not ready: Poor backplane contact, wrong configuration or hardware damage. Encoder fault: Damaged encoder cable, reversed wiring or encoder failure. Communication error: Bus parameter mismatch, missing terminal resistor or loose connector. Watchdog alarm: Software crash, strong electromagnetic interference or hardware defect.

Product Brief

21.44.03 KG0398 SIEB & MEYER digital servo axis control board,DC24V power supply,rack plug-in design,supports position/speed/torque closed loop control,matching SIEB & MEYER power modules,for CNC and semiconductor high precision motion control.