Abaco Systems / VMIC VMIVME-3128-000 Scanning 14-Bit A/D Converter Board

The Abaco Systems / VMIC VMIVME-3128-000 is a VMEbus scanning 14-bit analog-to-digital converter board engineered for high-speed multichannel data acquisition in industrial and scientific applications. It delivers up to 58 kHz overall scanning rate across 64 differential or single-ended input channels with 14-bit resolution and dual-port memory architecture enabling continuous operation without host processor intervention.

– Technical Specifications

Analog Input Channels & Resolution
• 64 differential or single-ended inputs
• 14-bit resolution
• Input ranges (jumper-selectable): 0 to +5 V, 0 to +10 V, ±2.5 V, ±5 V, ±10 V
• Software-programmable and jumper-selectable gain: 1×, 10×, or 100× (individual channel or fixed across all channels, programmable in real-time)
• Overvoltage-protected inputs with optional low-pass filtering (10 Hz, 50 Hz, 100 Hz, 500 Hz selectable)

Conversion Performance
• Overall scanning rate: 58 kHz (52 kHz also cited)
• Conversion cycle time: 17 µs per channel (acquisition, A/D conversion, storage)
• Maximum per-channel sample rate: 3.625 kSPS (when scanning 16 channels)

Scanning & Data Management
• Program-selectable scan modes: 16, 32, 48, or 64 channels with sequential block digitization
• Six operating modes: auto-scanning, single-channel random polling, timed burst, locally triggered burst, remotely triggered burst, gain loading
• 1,024-word dual-port data buffer (16-word deep × 64 channels)
• External trigger input for synchronizing up to sixteen boards simultaneously
• User-programmable interval timer

VMEbus Interface & Form Factor
• VMEbus compatible with programmed interrupts
• 6U VMEbus Eurocard form factor, single slot, 4 HP width
• 96-pin DIN connector (center row grounded) for analog inputs
• Operating temperature: 0°C to 55°C
• Maximum power consumption: 4 A at +5 VDC

– Key Features

• Minimal host processor overhead through on-board timer control
• Real-time per-channel gain adjustment without system halt
• Simultaneous dual-port memory access from VMEbus and scanning circuits
• Five selectable input ranges with independent gain per channel
• Multiple synchronization options for multi-board systems

– Typical Applications

• Factory automation and instrumentation
• Industrial process control and monitoring
• Scientific research data acquisition

– Compatibility & Integration

The VMIVME-3128-000 integrates directly into VMEbus backplanes and supports coordinated multi-board configurations via external trigger synchronization, making it suitable for distributed data acquisition architectures.