USB-1903USB DAQ module with eight current inputs
- Manufacturer
USB-1903 is a data acquisition module with current inputs linked over USB, suited to industrial measurement loops where the field transmitters work in the 0-20 mA range.
Sampling reaches 250 kS/s with DC coupling, while the two voltage outputs update at 1 MS/s over a ±10 V range. The link is USB 2.0 high-speed and power comes from the bus, with no external supply.
At a glance
- Channels: 8 channel
- ADC resolution: 16 bit
- DAC resolution: 16-bit bit
- Analog output range: ±10 V
- Simultaneous sampling: No
Technical specifications
| Digital I/O | 8 DI / 4 DO (TTL level)(out)8 DI / 4 DO (TTL level)(in) |
|---|
| Channels | 8 channel |
|---|---|
| Counter | 2× 32 bit (clock base 80 MHz, esterno fino a 10 MHz) |
| ADC resolution | 16 bit |
| Sampling rate | 250K samples/s (single channel); 250K/N-channel samples/s (scanning) kSps(aggregate) |
| DAC resolution | 16-bit bit |
| Analog output range | ±10 V |
| Input impedance | 249.5 Ω (input resistor) ohm(current) |
| Input coupling | DC |
| Simultaneous sampling | No |
| Trigger modes | SoftwareExternal digital triggerExternal analog trigger |
| Acquisition specifications | Ingressi: 8 canali in corrente 0–20 mA (resistori di precisione integrati, 249,5 Ω)(misc)Ingressi digitali TTL: VIL ≤0,8 V, VIH ≥2,0 V (0,2 mA max)(range)Errore di offset ±0,01 mA tip., errore di guadagno ±0,05% FSR tip.(accuracy)Uscite analogiche: 2 canali, 16 bit, 1 MS/s (aggiornamento simultaneo), pilotaggio ±5 mA(output) |
| I/O protection | Overvoltage(power on+continuous · ± 15 V)Overvoltage(power off+continuous · ± 2 V) |
| Board function | Analog and digital I/O |
|---|---|
| Architecture standard | USB |
| Bus interface | High speed USB 2.0 compatible, mini-USB connectorProgrammed I/O, continuous (USB bulk transfer mode) |
| Power input | USB bus powered |
|---|---|
| Power consumption | 5 V @ 400 mA (USB bus powered) = 2 W |
| Dimensions | 41.3 × 114 × 156.5 mm |
|---|
| Operating temperature | 0–55 °C |
|---|---|
| Storage temperature | -20–70 °C |
| Operating systems | WindowsLinux |
|---|---|
| Driver & SDK | LabVIEW, C/C++, Visual Studio.NET, MATLAB |
Data extracted from the manufacturers' technical sheets: the official product spec sheet remains the reference for final confirmation.
Documentation
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