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GE VMIVME-4514 Analog Input/Output (AIO) board

The VMIVME-4941 is a quad-channel synchro/resolver-to-digital converter board designed for high-precision position and speed measurement in industrial and embedded control systems. It integrates advanced signal conditioning and real-time data conversion, supporting both synchro and resolver inputs with configurable resolution and bandwidth.

Detailed content

Technical Specifications:

 

  • Input Types:
    • Synchro: Supports 11.8V (2% linearity) differential inputs with 4-wire configurations for angular position sensing.
    • Resolver: Accepts 11.8V (2% linearity) differential 4-wire resolver signals, ideal for rotational motion feedback.
  • Resolution: Software-selectable 10, 12, 14, or 16-bit digital output, enabling trade-offs between precision and tracking speed.
  • Accuracy: High-accuracy option achieves ±2.3 arc minutes (±4 LSB differential linearity) for demanding applications requiring sub-degree precision.
  • Bandwidth: Programmable bandwidths of 530 Hz (high-speed) or 130 Hz (high-accuracy), adaptable to dynamic or steady-state measurement needs.
  • Conversion Rate: Supports tracking rates up to 800 revolutions per second (resolver) or 160 revolutions per second (synchro), ensuring real-time responsiveness.
  • Data Interface: 16-bit pitch counter per channel with 8/16/32-bit VMEbus data transfer modes, compatible with VME64 standards for seamless integration into industrial backplanes.
  • Diagnostics: Built-in loopback testing and front-panel LEDs for power, signal loss, and fault status, enabling quick troubleshooting.
  • Environmental:
    • Operating temperature: 0°C to 55°C (industrial range).
    • Storage temperature: -20°C to 85°C.
    • Mechanical robustness: Withstands shock (50g, 11ms) and vibration (10g, 10–2000 Hz) typical of industrial environments.

 

Functional Features:

 

  • Flexible Configuration: Jumpers and software settings allow selection of input type (synchro/resolver), voltage range, and resolution without hardware modification.
  • Real-Time Performance: Direct memory access (DMA) minimizes CPU overhead, supporting deterministic control in systems requiring low-latency data processing.
  • Signal Conditioning: Galvanic isolation between analog inputs and VMEbus protects against ground loops and voltage transients, ensuring signal integrity.
  • Redundancy Support: Hot-swap capability enables module replacement without system downtime in redundant control architectures.
  • Software Transparency: BIOS and drivers facilitate plug-and-play integration with real-time operating systems (RTOS) like VxWorks, Linux, and QNX, reducing development complexity.

 

Application Scenarios:

 

  • Industrial Automation:
    • Controls robotic arms and CNC machines by converting resolver feedback into digital position data for closed-loop motion control.
    • Manages conveyor systems and packaging equipment through high-speed synchro-based position sensing.
  • Aerospace and Defense:
    • Implements flight simulators by processing resolver signals from hydraulic actuators and joystick inputs.
    • Supports radar antenna positioning systems with sub-degree accuracy for tracking and targeting.
  • Energy Management:
    • Monitors wind turbine blade angles using resolvers, optimizing power output by adjusting pitch in real time.
    • Controls hydroelectric generator synchronization through synchro-based phase alignment.
  • Medical Equipment:
    • Enables precise positioning in MRI scanners by converting resolver signals from gantry motors into digital coordinates.
    • Manages robotic surgical systems by integrating resolver feedback for sub-millimeter accuracy.
  • Transportation:
    • Controls railway signaling systems by monitoring resolver-based track switch positions.
    • Implements motorized door systems in metro trains, ensuring safe and reliable operation.

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