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OMB-DAQ-2408-Series
USB Data Acquisition Modules for Temperature and Voltage
- Measures Thermocouples or Voltage
- Up to 16 Analog Inputs
- 24-Bit Resolution
- Up to 1 kS/s Sampling
Product Overview
- Analog I/O Note Analog Input Note: ANALOG INPUT;A/D Converter Type: ADS1256, 24-bit Sigma Delta;A/D Data Rates: 3750 S/s, 2000 S/s, 1000 S/s, 500 S/s, 100 S/s, 60 S/s, 50 S/s, 25 S/s, 10 S/s, 5 S/s, 2.5 S/s;Throughput (Software-Selectable for Single Channel and Multiple Channels); Single Channel: 2.5 to 1102.94 S/s; Multiple Channels: 0.16 to 1102.94 Hz;Number of Channels: Up to 16 channels individually software-selectable as single ended (SE) or differential (DIFF); thermocouples require differential mode; for each channel configured as differential, you lose one single-ended channel;Input Isolation: 500 Vdc min between field wiring and USB interface;Channel Configurations: Temperature sensor input,;software-selectable to match sensor type; voltage input;Input Voltage Range; Thermocouple Mode: ±0.078125V; Voltage Mode (Software-Selectable); ±10V, ±5V, ±2.5V, ±1.25V, ±0.625V,; ±0.3125V, ±0.15625V, ±0.078125V;Absolute Maximum Input Voltage; CxH-CxL Relative to GND: ±22V max (power on), ±10V max (power off);Input Impedance: 10 MΩ (power on), 390Ω (power off);Input Leakage Current: ±20 nA;Input Voltage: >±22V (power on/off): ±1µ A max;Input Capacitance: 590 pf;Maximum Working Voltage (Signal + Common Mode); Voltage Mode: ±10.25V max;Common Mode Rejection Ratio; Thermocouple Mode (fIN = 60 Hz): 110 dB; Voltage Mode (fIN = 60 Hz, All Input Ranges): 90 dB;ADC Resolution: 24-bits;Crosstalk: Adjacent channels, 100 dB;Input Coupling: DC;Channel Gain Queue: Up to 64 elements, software-selectable channel and range;Warm-Up Time: 45 minutes min;Open Thermocouple Detect: Software-selectable for each channel;CJC Sensor Accuracy; 15 to 35°C: ±0.5°C typ; 0 to 55°C: ±1.0°C max
- Breakdown Voltage Drain to Source: 50 V
- CMRR Thermocouple Mode (fIN = 60 Hz): 110 dB, Voltage Mode (fIN = 60 Hz, All Input Ranges): 90 dB
- Configuration Parameters Alarm Functionality, Pull-Up/Down Configuration, Thermocouple Type Selection, User-Configurable Input/Output
- Data Interface Ethernet, USB 1.1, USB 2.0
- Data Interface Note Configuration Method: TracerDAQ Software;Output Configuration: Digital: Each DIO bit can be independently read from (DIN) or written to (DOUT). DIN bits can be read at any time whether the DOUT is active or tri-stated.;Supported Operating System: Microsoft Windows® VISTA/7/8/10 (32-bit and 64-bit)
- Digital Input Digital: Low = 0 Vdc
- Digital I/O Note DIGITAL INPUT Number of I/O: 8 channels Configuration: Each DIO bit can be independently read from (DIN) or written to (DOUT). DIN bits can be read at any time whether the DOUT is active or tri-stated. Input Voltage Range: 0 to 15V Input Type: CMOS (Schmitt trigger) Input Characteristics: 47 kΩ pull-up/pull-down resistor, 28 Ω series resistor Maximum Input Voltage Range: 0 to 20V max (power on/off, relative to DGND) Pull-Up/Pull-Down Configuration: All pins pulled up to 5V through individual 47 kΩ resistors (the J6 shorting block default position is pins 1 and 2) Pull-down capability is available by placing the J6 shorting block across pins 2 and 3 Transfer Rate (Software Paced): 500 port reads or single bit reads per second typ Input High Voltage: 1.3 to 2.2V Input Low Voltage: 1.5 to 0.6V Schmitt Trigger Hysteresis: 0.4V to 1.2 Output Characteristics: 47 kΩ pull-up, open drain (DMOS transistor) internally connected to DGND Pull-Up Configuration: All pins pulled up to 5V through individual 47 k? resistors (the J6 shorting block default position is pins 1 and 2). Transfer Rate (Software Paced) Digital Output: 500 port writes or single bit writes per second typ Output Voltage Range: 0 to 5V (no external pull up resistor, internal 47 Ωk pull-up resistors connected to 5V by default); 0 to 15V max Drain to Source Breakdown Voltage: 50V min, Off State Leakage Current: 1.0 µA Sink Current Capability: 150 mA max (continuous) per output pin 150 mA max (continuous) for all eight channels DMOS Transistor On-Resistance (Drain to Source): 4 Ω "Output Characteristics: 47 kΩ pull-up, open drain (DMOS transistor) internally connected to DGND Pull-Up Configuration: All pins pulled up to 5V through individual 47 k? resistors (the J6 shorting block default position is pins 1 and 2). Transfer Rate (Software Paced) Digital Output: 500 port writes or single bit writes per second typ Output Voltage Range: 0 to 5V (no external pull up resistor, internal 47 Ωk pull-up resistors connected to 5V by default); 0 to 15V max Drain to Source Breakdown Voltage: 50V min, Off State Leakage Current: 1.0 µA Sink Current Capability: 150 mA max (continuous) per output pin 150 mA max (continuous) for all eight channels DMOS Transistor On-Resistance (Drain to Source): 4 Ω "Output Characteristics: 47 kΩ pull-up, open drain (DMOS transistor) internally connected to DGND Pull-Up Configuration: All pins pulled up to 5V through individual 47 k? resistors (the J6 shorting block default position is pins 1 and 2). Transfer Rate (Software Paced) Digital Output: 500 port writes or single bit writes per second typ Output Voltage Range: 0 to 5V (no external pull up resistor, internal 47 Ωk pull-up resistors connected to 5V by default); 0 to 15V max Drain to Source Breakdown Voltage: 50V min, Off State Leakage Current: 1.0 µA Sink Current Capability: 150 mA max (continuous) per output pin 150 mA max (continuous) for all eight channels DMOS Transistor On-Resistance (Drain to Source): 4 Ω ;Cross talk: 100 dB;Transfer Rate: Digital: 500 port reads or single bit reads per second typ, Counter: System dependent, 500 reads or writes per second;Schmitt Trigger Hysteresis: 0.4V to 1.2V;Sink Current: 150 mA
- Digital Output 5 V ,AOUTx pins, ±5.0 mA maximum
- Electrical Connection Screw Terminal
- Electrical Output 0 to 5 Vdc
- Height 36 mm
- Impedance Input 10 MΩ (power on), 390 Ω (power off)
- Input Capacitance Analog: 590 pf, Counter: 25 pf
- Input Configuration Connected Software
- Input Type Thermocouple, Voltage
- Input Voltage Note Absolute Maximum Input Voltage: Analog: CxH-CxL Relative to GND - ±22V max (Power On), ±10V maximum (Power Off), Digital: 0 to 20V maximum (Power On/Off, relative to DGND), Counter: CTR0, CTR1 relative to GND and DGND, ±20V maximum (Power On/Off)
- Isolation 500 Vdc Minimum between field Wiring and USB Interface
- Leakage Current ±20 nA
- LED Indicators Supply Status LED
- Length 127 mm
- Memory EEPROM: 4096 bytes
- Microcontroller One high-performance 8-bit RISC microcontroller with USB interface (non-isolated); one high‑performance 16-bit RISC microcontroller for measurements (isolated)
- Number of Channels, Input Analog: 16 SE/8 DIFF, Digital: 8, Counter: 2
- Operating Temperature, Max 50 °C
- Operating Temperature, Min 0 °C
- Output Settling Time 10V step, 75 μs
- Pull-down Resistor 47 kΩ
- Pull-up Resistor 47 kΩ
- Relative Humidity 0 to 90% RH non-condensing
- Sampling Rate 1 kHz (1,000 updates/second)
- Sampling Rate Note The maximum throughput of an OMB-DAQ-2408 module is 1.1 kS/s aggregate. The OMB-DAQ-2408 provides the ability to set conversion rates on a per-channel basis. This feature gives the user flexibility and control over noise averaging for each channel. Analog Input Throughput (Software-Selectable for Single Channel and Multiple Channels): Single Channel:2.5 to 1102.94 S/s, Multiple Channels: 0.16 to 1102.94 Hz Analog Output Throughput: Single-Channel: 1000 S/s maximum, system-dependent, Multi-Channel: 1000 S/s /#ch maximum, system-dependent
- Series ID OMB-DAQ-2408-Series
- Slew Rate 1.0 V/μs
- Storage Temperature, Max 85 °C
- Storage Temperature, Min -40 °C
- Supply Current 275 mA
- Supply Power Note Quiescent current, 275 mA (includes up to 10 mA for the status LED; does not include any potential loading of the digital I/O bits, 5V user terminal or the AOUTx outputs). 5V User Output Voltage Range: Available at terminal block pin 40, 4.75 to 5.25V 5V User Output Current: Available at terminal block pin 40, 10 mA maximum, Isolation: Measurement system to PC, 500 Vdc minimum
- Supply Voltage 5 Vdc
- USB Cable Length 3 m
- Warm Up Time 45 min
- Weight 160 g
- Width 89 mm
- Wire Gauge 30 to 16 AWG
Supported Applications
The Omega OMB-DAQ-2408 Series comprises multifunction USB data acquisition modules designed for highly accurate voltage and temperature measurements. These devices serve as isolated interfaces between field sensors and Microsoft Windows operating systems (Vista, 7, 8, 10; 32-bit and 64-bit). The series supports analog input configurations for single-ended or differential voltage signals and thermocouple inputs with built-in cold-junction compensation.
Documented measurement capabilities include:
- Analog DC voltage acquisition across configurable ranges
- Differential thermocouple temperature monitoring (Types J, K, T, E, R, S, B, N)
- Digital I/O signal processing
- Event counting via 32-bit counters
- Analog output generation on the OMB-DAQ-2408-2AO variant
The modules provide a minimum of 500 VDC input isolation between field wiring and the USB interface.
Operating Conditions & Performance
The series operates within an ambient temperature range of 0 to 50°C (32 to 122°F) with humidity ratings from 0 to 90% RH non-condensing. Storage temperatures are specified as -40 to 85°C (-40 to 185°F). Power is supplied via the USB bus.
Performance specifications for analog inputs include:
- Resolution: 24-bit
- Sampling Rate: Up to 1 kS/s per channel; simultaneous sampling up to 500 S/s on dual-output models.
- Analog Input Ranges: ±10 V, ±5 V, ±2.5 V, ±1.25 V, ±0.625 V, ±0.3125 V, ±0.15625 V, and ±0.078125 V.
- Accuracy (±10V Range): Gain Error of ±0.0037% reading; Offset Error of 50 µV; INL Error Accuracy of ±0.0008%; Absolute error of 500 µV.
- Cold Junction Compensation (CJC) Sensor Accuracy: ±0.5°C at 15 to 35°C and ±1.0°C at 0 to 55°C.
Analog output channels on the OMB-DAQ-2408-2AO model provide a calibrated range of ±10 V (uncalibrated ±10.05 V) with 16-bit resolution. Digital I/O operates at 0 to 5V for outputs and accepts 0 to 15V inputs.
Configuration Options
The series offers two primary configurations distinguished by analog output capability:
- OMB-DAQ-2408: Features 16 single-ended or 8 differential 24-bit analog inputs, 8 lines of digital I/O, and 2 counters.
- OMB-DAQ-2408-2AO: Includes all features of the base model plus two 16-bit analog output channels capable of pacing up to 500 S/s simultaneously or 1 kS/s on a single channel.
All models utilize screw terminals for field wiring connections and connect via USB 2.0 (full-speed). The physical dimensions are 127 L × 89.9 W × 35.6 mm D (5.00 × 3.53 × 1.40") with a weight of 160 g (5.6 oz).
Key Product Differences
The primary distinction between the OMB-DAQ-2408 and OMB-DAQ-2408-2AO models is the inclusion of analog output channels. The base model provides input-only functionality for voltage, temperature (thermocouple), digital I/O, and counting. The -2AO variant adds two 16-bit analog outputs.
Both variants share identical specifications regarding:
- Analog input resolution (24-bit) and channel count (16 SE / 8 DIFF)
- Digital I/O line count (8 lines)
- Counter inputs (two 32-bit counters)
- Thermocouple support types (J, K, T, E, R, S, B, N) and cold-junction compensation
- Isolation rating (500 VDC minimum between field wiring and USB interface)
- Operating temperature and humidity limits
The series is supplied with TracerDAQ software. An optional upgrade to TracerDAQ Pro provides expanded channel support, alarm conditions, measurements windows, annotations, triggering options (software/hardware/time-of-day), linear scaling, math channels, reference channels, and function generator capabilities.
PDFs & Manuals
Software & Drivers