OM-USB-3100-Series

Supported Applications

The Omega OM-USB-3100 Series consists of USB data acquisition modules designed to provide analog voltage output, digital I/O control, and event counting. The series includes the OM-USB-3101 (4-channel), OM-USB-3103 (8-channel), and OM-USB-3105 (16-channel) models. These devices function as 16-bit digital-to-analog converters (DACs) for generating analog signals in test, measurement, and control environments.

Applications supported by the series include:

• Analog voltage signal generation with software-configurable ranges
• Digital input/output interfacing via TTL-compatible logic levels
• Event counting using a 32-bit counter/timer
• Synchronous DAC updates for coordinated multi-channel output
• Data logging and analysis when paired with TracerDAQ or TracerDAQ Pro software on Microsoft Windows XP, Vista, or 7 operating systems

Operating Conditions & Performance

The OM-USB-3100 Series operates within an ambient temperature range of 0 to 70°C (32 to 158°F) and a storage temperature range of -40 to 85°C (-40 to 185°F). Humidity must remain between 0 to 90% RH, non-condensing. The modules are powered by the +5 V USB supply.

Key performance specifications include:

• Analog Output Resolution: 16 bits
• Output Ranges (Software-Selectable): Calibrated ±10V or 0 to 10V; Uncalibrated ±10.2V, -0.04V to 10.08V
• Absolute Accuracy: ±4.0 LSB for the ±10V range and ±22.0 LSB for the 0 to 10V range (calibrated output)
• Update Rate: Up to 100 kS/s per channel
• Output Impedance: < 100 Ω
• Settling Time: 25 μs typical (to 1 LSB accuracy)
• Digital I/O Transfer Rate: System-dependent, 33 to 1000 port reads/writes or single bit reads/writes per second
• Counter Input Frequency: 1 MHz maximum

The series features a quad (4-channel) DAC architecture in the OM-USB-3101, with expanded channel counts available in higher models. Power consumption varies by model: OM-USB-3101 draws approximately 140 mA typical; OM-USB-3103 draws 160 mA typical; and OM-USB-3105 draws 200 mA typical.

Configuration Options

The series offers configurable capabilities across channel count, output range selection, digital I/O configuration, and software integration:

• Analog Output Channels: Available in 4 (OM-USB-3101), 8 (OM-USB-3103), or 16 (OM-USB-3105) configurations
• Digital I/O Lines: 8 bidirectional lines, configurable as input or output with software-selectable pull-up/pull-down states
• Synchronous DAC Load: Supports external synchronization via the SYNCLD pin (terminal block pin 49) for coordinated updates across channels
• Event Counter: One 32-bit event counter with TTL rising-edge triggered input, supporting frequencies up to 1 MHz
• Memory: On-board EEPROM provides 256 bytes of user data storage (address range 0x000-0x0FF)
• Software Compatibility: Includes TracerDAQ Pro software for advanced features such as alarm conditions, measurements window, annotations, triggering options, linear scaling, and waveform generation
• Physical Interface: Screw terminal I/O connector with 32 pins; USB 2.0 full-speed interface (12 Mbps) compatible with USB 1.1 ports

Key Product Differences

The OM-USB-3100 Series differentiates its models primarily by analog output channel count:

• OM-USB-3101: 4-channel, 16-bit analog voltage output USB module
• OM-USB-3103: 8-channel, 16-bit analog voltage output USB module
• OM-USB-3105: 16-channel, 16-bit analog voltage output USB module

All models share identical core specifications for resolution (16 bits), update rate capability (up to 100 kS/s per channel), digital I/O configuration (8 lines), counter functionality (32-bit event counter), and environmental limits. Differences in power consumption correspond directly to the number of active DAC channels.

Software options include TracerDAQ for basic data logging and viewing, or TracerDAQ Pro for expanded capabilities such as multi-lane strip charts, oscilloscope views with math/reference channels, function generator waveforms (sine, square, triangle, flat, pulse, ramp, random, arbitrary), rate generators, and hardware/software triggering.

Dimensions are consistent across the series at 127 L × 88.9 W × 35.6 H mm (5.0 × 3.5 × 1.4"), with a weight of approximately 159 g (0.35 lb). The modules carry CE certification and include a standard one-year warranty, extendable via the OMEGACARE program.