Measurement-computing USB-TC-AI Manual do Utilizador descarregar pdf (Página 21)

USB-TC-AI User's Guide Specifications

Microcontroller

Table 15. Microcontroller specifications

Parameter

Specification

Type

Two high-performance 8-bit RISC microcontrollers

USB +5V voltage

Table 16. USB +5V voltage specifications

Parameter

Specification

USB +5V (VBUS) input

voltage range

4.75 V min to 5.25 V max

Power

Table 17. Power specifications

Parameter

Conditions

Specification

Supply current

USB enumeration

<100 mA

Supply current

(Note 14)

Continuous 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 14)

5 mA max

Isolation

Measurement system to PC

500 VDC min

Note 14: This is the total current requirement for the USB-TC-AI which includes up to 10 mA for the

status LED.

USB specifications

Table 18. USB specifications

Parameter

Specification

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

Environmental

Table 19. Environmental specifications

Parameter

Specification

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 ... 16 17 18 19 20 21 22 23 24

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