Measurement-computing USB-DIO24/37 Instrukcja Użytkownika Pobierz pdf (Strona 16)

USB-DIO24/37 User's Guide Specifications

Data transfer rates

Table 3. Data transfer rate specifications

Digital I/O transfer rates (software paced)

Digital input

62 port reads or single bit reads per second (typical)

Digital output

125port writes or single bit writes per second (typical)

Counter/timer read/write rates (software paced)

Counter read

62 port reads per second (typical)

Counter clear

125 port writes per second (typical)

Power

Table 4 . Power specifications

Parameter

Conditions

Specification

Supply current (Note 2)

20 mA typ, 40 mA max

+5V USB power available (Note3)

Connected to Self-Powered Hub

4.5 V min, 5.25 V max

Connected to Bus-Powered Hub

4.1 V min, 5.25 V max

Output current (Note 4)

Connected to Self-Powered Hub

460 mA max

Connected to Bus-Powered Hub

60 mA max

Note 2: This is the total current requirement for the USB-DIO24/37 which includes up to 5 mA for the status

LED.

Note 3: Self-powered refers to USB hubs and hosts with a power supply. Bus-powered refers to USB hubs

and hosts without their own power supply.

Note 4: This refers to the total amount of current that can be sourced from the USB +5V and digital outputs.

General

Table 5. General specifications

Parameter

Conditions

Specification

USB controller clock error

25 °C

±30 ppm max

0 to 70 °C

±50 ppm max

Device type

USB 1.1 low-speed

Device compatibility

USB 1.1, USB 2.0

Environmental

Table 6. Environmental specifications

Operating temperature range

0 to 70 °C

Storage temperature range

-40 to 85 °C

Humidity

0 to 90% non-condensing

1 2 ... 11 12 13 14 15 16 17 18 19

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