Measurement-computing USB-2408 Series Manual do Utilizador descarregar pdf (Página 30)

USB-2408 Series User's Guide Specifications

Power

Table 23. Power specifications

Parameter

Conditions

Specification

Supply current (Note 8)

Quiescent current

275 mA

Voltage supervisor limits

4.5 V > V

ext

or V

ext

> 5.5 V

PWR LED = Off; (power fault)

4.5 V < V

ext

< 5.5 V

PWR LED = On

+5 V user output voltage range

Available at terminal block pin 40

4.75 V min to 5.25 V max

+5 V user output current

Available at terminal block pin 40

10 mA max

Isolation

Measurement system to PC

500 VDC min

Note 8: This is the total quiescent current requirement for the USB-2408 Series which includes up to 10 mA

for the status LED. This does not include any potential loading of the digital I/O bits, +5 V user

terminal or the AOUTx outputs.

USB specifications

Table 24. USB specifications

Parameter

Specifications

USB device type

USB 2.0 (full-speed)

Device compatibility

USB 1.1, USB 2.0

USB cable type

A-B cable, UL type AWM 2527 or equivalent. (min 24 AWG VBUS/GND,

min 28 AWG D+/D–)

USB cable length

3 meters max

Environmental

Table 25. Environmental specifications

Parameter

Specifications

Operating temperature range

0 °C to 50 °C max

Storage temperature range

–40 °C to 85 °C max

Humidity

0 to 90% non-condensing max

Mechanical

Table 26. Mechanical specifications

Parameter

Specifications

Dimensions (L x W x H)

127  89.9  35.6 mm (5.00 x 3.53 x 1.40 in.)

User connection length

3 meters max

Screw terminal connector type and pinout

Table 27. Screw terminal connector specifications

Connector type

Fixed screw terminal

Wire gauge range

16 AWG to 30 AWG

1 2 ... 25 26 27 28 29 30 31 32 33 34

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