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GE VMIC-4941

1. Core Architecture

  • Function: Quad-Channel Synchro/Resolver-to-Digital Converter .
  • Channels: Four independent synchro/resolver input channels .
  • Resolution: Programmable 10-bit, 12-bit, 14-bit, or 16-bit digital output .
  • Bandwidth: Selectable 530 Hz (high-speed) or 130 Hz (high-precision) modes .
  • Accuracy±2.3 arc-minutes (optional enhanced precision) .
  • Reference Frequency360 Hz to 6 kHz (user-configurable) .

Detailed content

2. Data Handling & Control

  • Counters16-bit pitch counters per channel for angular position tracking .
  • Data Transfer: Supports 8-bit, 16-bit, or 32-bit VMEbus data formats .
  • Addressing: Configurable via 11-bit DIP switch for physical/VMEbus addressing .

3. Diagnostics & Safety

  • Built-in Test (BIT):
    • Validates resolver hybrid modules and VMEbus control logic .
    • Accepts test signals via P2 VMEbus expansion connector .
  • Fault Indicators: Front-panel LED for signal losserror faults, and power-on self-test status .

4. Environmental & Electrical

  • Operating Temperature0°C to +55°C .
  • Storage Temperature-20°C to +85°C .
  • Humidity20–80% non-condensing .
  • Power Requirements:
    • +5VDC ±5% at 2A .
    • ±15VDC ±5% at 100mA .
  • Compliance: Industrial-grade EMI/RFI immunity; RoHS-compliant .

Functional Features

1. Precision Motion Capture

  • Real-Time Angular Conversion: Translates synchro/resolver analog signals (e.g., rotor position) into digital data with microsecond latency .
  • Dynamic Bandwidth Tuning: Optimizes response time (530 Hz) or precision (130 Hz) per application needs .

2. Embedded Diagnostics

  • Automatic Fault Isolation: LED indicators and BIT protocols identify signal degradation or hardware failures .
  • Test Mode: Inject synthetic signals via P2 connector for offline validation .

3. Flexibility

  • Programmable Resolution: Trade off speed vs. accuracy dynamically (e.g., 16-bit for CNC machining; 10-bit for radar tracking) .
  • VMEbus Integration: Direct backplane interfacing for deterministic data transfers .

Application Scenarios

Domain Use Cases Key Capabilities Utilized
Industrial Robotics Joint angle feedback for robotic arms and automated assembly lines 16-bit resolution; ±2.3 arc-minute precision .
Aerospace & Defense Radar antenna positioning, missile guidance systems, and flight control surfaces 530 Hz bandwidth; 6 kHz reference frequency support .
CNC Machinery Tool path calibration and spindle positioning in precision milling/lathing Programmable pitch counters; VMEbus real-time data streaming .
Energy Systems Turbine blade angle monitoring in wind/hydroelectric plants Built-in diagnostics; humidity resilience .

Technical Differentiation

Feature VMIVME-4941 Standard Industrial Converters
Channel Density 4 channels (independent operation) 1–2 channels
Resolution Range 10–16 bits (software-selectable) Fixed resolution (e.g., 12-bit)
Fault Diagnostics LED indicators + BIT protocols Limited/no hardware diagnostics
Reference Frequency 360 Hz–6 kHz (wide range) Narrow fixed range

Ordering & Integration

  • Model Variants: Base model (VMIVME-4941); enhanced-precision options available .
  • Ecosystem Compatibility:
    • Integrates with GE VMIC CPUs (e.g., VMIVME-7750) and VMEbus backplanes .
    • Compatible with GE Proficy® SCADA systems and third-party PLCs .
  • Warranty: Standard 12–24 months (varies by supplier) .

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