Measurement-computing USB-TEMP-AI Manuale Utente Scaricare il pdf (Pagina 27)

USB-TEMP-AI User's Guide Specifications

Power

Table 20. Power specifications

Parameter

Conditions

Specification

Supply current

USB enumeration

<100 mA

Supply current

(Note 21)

Quiescent mode with all inputs

configured for Disabled mode

270 mA typ

User +5V output voltage range

(terminal block pin 21)

4.9 V min to 5.1 V max

User +5V output current

(terminal block pin 21)

Bus-powered and connected to a

self-powered hub. (Note 21)

5 mA max

Isolation

Measurement system to PC

500 VDC min

Note 21: This is the total current requirement for the device which includes up to 10 mA for the status LED.

USB specifications

Table 21. USB specifications

USB device type

USB 2.0 (full-speed)

Device compatibility

USB 1.1, USB 2.0

Device power capability

Self-powered

USB cable type

A-B cable, UL type AWM 2725 or equivalent (min 24 AWG VBUS/GND,

min 28 AWG D+/D–)

USB cable length

3 meters max

Current excitation outputs (±Ix, T0x-T3x)

Table 22. Current excitation output specifications

Parameter

Specification

Configuration

2 dedicated pairs:

 ±I1: T0x/T1x

 ±I2: T2x/T3x

Current excitation output

ranges

Thermistor: 10 µA

RTD: 210 µA

Tolerance

±5.0%

Drift

200 ppm/°C

Line regulation

2.1 ppm/V max

Load regulation

0.3 ppm/V

Output compliance voltage

(relative to GND pins)

3.90 V max

–0.03 V min

Note 22: The device has two current excitation outputs, with ±I1 dedicated to the T0x/T1x analog inputs,

and ±I2 dedicated to T2x/T3x. The excitation output currents should always be used in this dedicated

configuration.

Note 23: The current excitation outputs are automatically configured based on the sensor (thermistor or

RTD) selected.

Environmental

Table 23. Environmental specifications

Operating temperature range

0 °C to 55 °C max

Storage temperature range

–40 °C to 85 °C max

Humidity

0% to 90% non-condensing max

1 2 ... 22 23 24 25 26 27 28 29 30

Commenti su questo manuale

Nessun commento

Measurement-computing USB-TEMP-AI Manuale Utente Pagina 27

Commenti su questo manuale

Prodotti e manuali riguardandi Hardware Measurement-computing USB-TEMP-AI