Measurement-computing PCI-DIO24H Manual do Utilizador descarregar pdf (Página 14)

Chapter 4

Specifications

Typical for 25 °C unless otherwise specified.

Specifications in italic text are guaranteed by design.

Power consumption

Table 1. Power consumption specifications

+5V operating

625 mA typical, 960 mA max

Digital input / output

Table 2. Digital input / output specifications

Digital type

8255 mode 0 emulation

Output:

74S244

Input:

74LS373

Configuration

2 banks of 8, 2 banks of 4, programmable by bank as input or output

Number of channels

24 I/O

Output high

2.4 volts min @ -15 mA

Output low

0.5 volts max @ 64 mA

Input high

2.0 volts min, 7 volts absolute max

Input low

0.8 volts max, -0.5 volts absolute min

Power-up / reset state

Input mode (high impedance)

Interrupts

INTA# - mapped to IRQn via PCI BIOS at boot-time

Interrupt enable

External (IR ENABLE, active low, disabled by default through internal resistor to

TTL high) and programmable through PCI9052:

0 = disabled

1 = enabled (default)

Interrupt sources

External source (IR INPUT), polarity programmable through PCI9052;

1 = active high

0 = active low (default)

Environmental

Table 3. Environmental specifications

Operating temperature range

0 to 50 °C

Storage temperature range

-20 to 70 °C

Humidity

0 to 90% non-condensing

1 2 ... 9 10 11 12 13 14 15 16 17

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