SIEB & MEYER AG 26.80.12C Axis Control Board

Module Feature

SIEB & MEYER AG 26.80.12C is rack plug-in digital servo axis control board. It is the motion calculation core for single-axis servo system, works cooperatively with SIEB & MEYER matched power modules. It acquires motor encoder position and speed feedback, executes position, speed and torque closed-loop servo algorithms. Supports digital backplane bus and analog command input. Equipped with hardware watchdog and multi-channel fault detection. Compact rack plug-in structure with stable EMC performance. Widely used for high precision motion axes in CNC machine tools, semiconductor processing equipment and automated inspection machinery.

Working principle

The control board receives motion setpoint commands from upper CNC or motion controller. It reads real-time position and speed data from motor encoder, performs high-speed servo closed-loop calculation, and outputs control reference signals to the matched servo power module. It continuously monitors the operating status of the power stage. Once fault condition is detected, it immediately shuts down drive output and sends fault code to host system for safety interlock.

Onboard components

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

LED indicators

Front panel LED indicators for DC power supply, board ready, servo enable, bus communication status and fault code display.

Hardware self-diagnosis

Visual inspection of PCB, connectors and backplane gold fingers; power rail voltage measurement; encoder cable continuity test; read LED fault codes; check PCB for corrosion or burn traces; verify bus communication wiring.

Programming software

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

Electrical & Process Parameters

Model: AG 26.80.12C Input voltage: DC24V Control mode: Position / Speed / Torque Command interface: Rack backplane bus / analog command Signal: Encoder position 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 digital servo axis control board

System compatibility

Compatible with SIEB & MEYER series servo power modules and rack power supply units, forms complete single-axis high precision servo drive system.

Function

AG 26.80.12C axis control board manufactured by SIEB & MEYER. It receives motion instructions from upper control system, performs closed-loop servo calculation and sends control references to power module to realize precise motor positioning. Faults such as encoder signal loss, bus communication interruption and watchdog trigger will stop servo operation and trigger alarm. It is core motion control card for SIEB & MEYER rack servo drive system.

Installation

Follow lockout/tagout safety procedure before installation. Cut off all rack power completely. Insert the board into designated rack slot and lock the handle tightly, confirm reliable 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 and positioning verification before formal operation.

Interface

DC24V power pin, encoder signal connector, backplane bus connector, analog command terminal, fault alarm output terminal of AG 26.80.12C.

Diagnostic

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

Product Brief

AG 26.80.12C SIEB & MEYER digital servo axis control board,DC24V supply,rack plug-in design,supports position/speed/torque closed loop control,matching SIEB & MEYER servo power modules,for CNC and semiconductor high precision single-axis motion control.