Designed for highly accurate temperature and voltage measurement, this USB data acquisition module provides 16 single-ended or 8 differential analog inputs at 24-bit resolution, up to 1 kS/s. It accepts type J, K, T, E, R, S, B, N thermocouples or voltage from ±0.078 to ±10 V, with 500 V DC isolation, 8 digital I/O, two counters, and two 16-bit ±10 V analog outputs.
Designed for highly accurate temperature and voltage measurement, this USB data acquisition module provides 16 single-ended or 8 differential analog inputs at 24-bit resolution, up to 1 kS/s. It accepts type J, K, T, E, R, S, B, N thermocouples or voltage from ±0.078 to ±10 V, with 500 V DC isolation, 8 digital I/O, two counters, and two 16-bit ±10 V analog outputs.
The OMB-DAQ-2408 Series are multifunction DAQ devices designed for highly-accurate voltage or temperature measurements. Each device features up to 16 single ended (SE)/8 differential (DIFF) analog inputs. Each device includes 8 digital I/O and two counter inputs. The OMB-DAQ-2408-2AO also features two analog outputs. Each device in the series offers 24-bit resolution for ultra-accurate voltage or thermocouple measurements.
Each device includes 16 SE/8 DIFF analog inputs which you can configure for voltage or thermocouple input on a per-channel basis. Eight software-selectable voltage input ranges are provided. You can configure these ranges on a per-channel basis from ±10 V to ±0.078 V. When measuring thermocouples, configure analog inputs in DIFF mode. All devices also include open thermocouple detection to identify improperly working thermocouples.
The OMB-DAQ-2408-2AO includes two 16-bit analog outputs. Each output has a ±10 V range. Both outputs can be updated at a rate of up to 500 S/s per channel; one output can be updated at a rate of 1 kS/s.
Features
Applications
| 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, single channel | 2.5 to 1102.94 S/s |
| Throughput, 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 |
| Input isolation | 500 V DC minimum between field wiring and USB interface |
| Input voltage range, thermocouple mode | ±0.078125 V |
| Input voltage range, voltage mode (software-selectable) | ±10 V, ±5 V, ±2.5 V, ±1.25 V, ±0.625 V, ±0.3125 V, ±0.15625 V, ±0.078125 V |
| Absolute maximum input voltage CxH-CxL relative to GND | ±22 V maximum (power on), ±10 V maximum (power off) |
| Input impedance | 10 MΩ (power on), 390 Ω (power off) |
| Input leakage current | ±20 nA |
| Maximum working voltage (signal + common mode), voltage mode | ±10.25 V maximum |
| Common mode rejection ratio, thermocouple mode (fIN = 60 Hz) | 110 dB |
| Common mode rejection ratio, voltage mode (fIN = 60 Hz, all input ranges) | 90 dB |
| ADC resolution | 24 bits |
| Crosstalk | Adjacent channels, 100 dB |
| Channel gain queue | Up to 64 elements, software-selectable channel and range |
| Warm-up time | 45 minutes minimum |
| Open thermocouple detect | Software-selectable for each channel |
| CJC sensor accuracy | 15 to 35°C: ±0.5°C typical; 0 to 55°C: ±1.0°C maximum |
| Analog input DC voltage accuracy, ±10 V | Gain error ±0.0037% of reading, offset error 50 µV, INL error ±0.0008, accuracy absolute 500 µV |
| Type J thermocouple accuracy | Maximum: ±2.572 @ -210°C, ±0.935 @ 0°C, ±1.869 @ 1200°C (°C); includes CJC and linearization error |
| Type K thermocouple accuracy | Maximum: ±2.917 @ -210°C, ±1.017 @ 0°C, ±2.478 @ 1372°C (°C) |
| Type T thermocouple accuracy | Maximum: ±2.821 @ -200°C, ±1.050 @ 0°C, ±0.957 @ 400°C (°C) |
| Type E thermocouple accuracy | Maximum: ±2.413 @ -200°C, ±1.069 @ 0°C, ±1.575 @ 1000°C (°C) |
| Type R thermocouple accuracy | Maximum: ±4.826 @ -50°C, ±2.117 @ 250°C, ±2.842 @ 1768°C (°C) |
| Type S thermocouple accuracy | Maximum: ±4.510 @ -50°C, ±2.165 @ 250°C, ±3.187 @ 1768°C (°C) |
| Type B thermocouple accuracy | Maximum: ±5.489 @ 250°C, ±2.283 @ 700°C, ±2.202 @ 1820°C (°C) |
| Type N thermocouple accuracy | Maximum: ±3.480 @ -200°C, ±1.201 @ 0°C, ±1.991 @ 1300°C (°C) |
| Digital to analog converter | DAC8552 |
| Number of channels | 2 |
| Resolution | 16-bits |
| Output range, calibrated | ±10 V |
| Output current | AOUTx pins, ±5.0 mA maximum |
| Throughput | Single-channel: 1000 S/s maximum, system-dependent; Multi-channel: 1000 S/s /#ch maximum, system-dependent |
| Differential non linearity | ±0.25 LSB typical, ±1 LSB maximum |
| Settling time | To rated accuracy, 10 V step, 75 µs |
| Slew rate | 1.0 V/µs |
| Number of I/O | 8 channels |
| Configuration | Each DIO bit can be independently read from (DIN) or written to (DOUT) |
| Number of channels | 2 channels |
| Resolution | 32-bits |
| Counter type | Event counter |
| Input type | Schmitt trigger, rising edge triggered |
| Input frequency | 1 MHz, maximum |
| Microcontroller | One high-performance 8-bit RISC microcontroller with USB interface (non-isolated); one high-performance 16-bit RISC microcontroller for measurements (isolated) |
| Supply current | Quiescent current, 275 mA |
| 5 V user output voltage range | Available at terminal block pin 40, 4.75 to 5.25 V |
| 5 V user output current | Available at terminal block pin 40, 10 mA maximum |
| Isolation | Measurement system to PC, 500 V DC minimum |
| USB device type | USB 2.0 (full-speed) |
| Device compatibility | USB 1.1, USB 2.0 |
| USB cable length | 9.8' (3 m) maximum |
| Screw terminal connector type | Fixed screw terminal |
| Wire gauge range | 16 to 30 AWG |
| Operating temperature range | 32 to 122°F (0 to 50°C) |
| Storage temperature range | -40 to 185°F (-40 to 85°C) |
| Humidity | 0 to 90% RH non-condensing |
| Dimensions | 5.00 x 3.53 x 1.40" (127 x 89.9 x 35.6 mm) |
| Weight | Weight: 5.6 oz (160 g) |
| 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, single channel | 2.5 to 1102.94 S/s |
| Throughput, 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 |
| Input isolation | 500 V DC minimum between field wiring and USB interface |
| Input voltage range, thermocouple mode | ±0.078125 V |
| Input voltage range, voltage mode (software-selectable) | ±10 V, ±5 V, ±2.5 V, ±1.25 V, ±0.625 V, ±0.3125 V, ±0.15625 V, ±0.078125 V |
| Absolute maximum input voltage CxH-CxL relative to GND | ±22 V maximum (power on), ±10 V maximum (power off) |
| Input impedance | 10 MΩ (power on), 390 Ω (power off) |
| Input leakage current | ±20 nA |
| Maximum working voltage (signal + common mode), voltage mode | ±10.25 V maximum |
| Common mode rejection ratio, thermocouple mode (fIN = 60 Hz) | 110 dB |
| Common mode rejection ratio, voltage mode (fIN = 60 Hz, all input ranges) | 90 dB |
| ADC resolution | 24 bits |
| Crosstalk | Adjacent channels, 100 dB |
| Channel gain queue | Up to 64 elements, software-selectable channel and range |
| Warm-up time | 45 minutes minimum |
| Open thermocouple detect | Software-selectable for each channel |
| CJC sensor accuracy | 15 to 35°C: ±0.5°C typical; 0 to 55°C: ±1.0°C maximum |
| Analog input DC voltage accuracy, ±10 V | Gain error ±0.0037% of reading, offset error 50 µV, INL error ±0.0008, accuracy absolute 500 µV |
| Type J thermocouple accuracy | Maximum: ±2.572 @ -210°C, ±0.935 @ 0°C, ±1.869 @ 1200°C (°C); includes CJC and linearization error |
| Type K thermocouple accuracy | Maximum: ±2.917 @ -210°C, ±1.017 @ 0°C, ±2.478 @ 1372°C (°C) |
| Type T thermocouple accuracy | Maximum: ±2.821 @ -200°C, ±1.050 @ 0°C, ±0.957 @ 400°C (°C) |
| Type E thermocouple accuracy | Maximum: ±2.413 @ -200°C, ±1.069 @ 0°C, ±1.575 @ 1000°C (°C) |
| Type R thermocouple accuracy | Maximum: ±4.826 @ -50°C, ±2.117 @ 250°C, ±2.842 @ 1768°C (°C) |
| Type S thermocouple accuracy | Maximum: ±4.510 @ -50°C, ±2.165 @ 250°C, ±3.187 @ 1768°C (°C) |
| Type B thermocouple accuracy | Maximum: ±5.489 @ 250°C, ±2.283 @ 700°C, ±2.202 @ 1820°C (°C) |
| Type N thermocouple accuracy | Maximum: ±3.480 @ -200°C, ±1.201 @ 0°C, ±1.991 @ 1300°C (°C) |
| Digital to analog converter | DAC8552 |
| Number of channels | 2 |
| Resolution | 16-bits |
| Output range, calibrated | ±10 V |
| Output current | AOUTx pins, ±5.0 mA maximum |
| Throughput | Single-channel: 1000 S/s maximum, system-dependent; Multi-channel: 1000 S/s /#ch maximum, system-dependent |
| Differential non linearity | ±0.25 LSB typical, ±1 LSB maximum |
| Settling time | To rated accuracy, 10 V step, 75 µs |
| Slew rate | 1.0 V/µs |
| Number of I/O | 8 channels |
| Configuration | Each DIO bit can be independently read from (DIN) or written to (DOUT) |
| Number of channels | 2 channels |
| Resolution | 32-bits |
| Counter type | Event counter |
| Input type | Schmitt trigger, rising edge triggered |
| Input frequency | 1 MHz, maximum |
| Microcontroller | One high-performance 8-bit RISC microcontroller with USB interface (non-isolated); one high-performance 16-bit RISC microcontroller for measurements (isolated) |
| Supply current | Quiescent current, 275 mA |
| 5 V user output voltage range | Available at terminal block pin 40, 4.75 to 5.25 V |
| 5 V user output current | Available at terminal block pin 40, 10 mA maximum |
| Isolation | Measurement system to PC, 500 V DC minimum |
| USB device type | USB 2.0 (full-speed) |
| Device compatibility | USB 1.1, USB 2.0 |
| USB cable length | 9.8' (3 m) maximum |
| Screw terminal connector type | Fixed screw terminal |
| Wire gauge range | 16 to 30 AWG |
| Operating temperature range | 32 to 122°F (0 to 50°C) |
| Storage temperature range | -40 to 185°F (-40 to 85°C) |
| Humidity | 0 to 90% RH non-condensing |
| Dimensions | 5.00 x 3.53 x 1.40" (127 x 89.9 x 35.6 mm) |
| Weight | Weight: 5.6 oz (160 g) |
