Measurement-computing CIO-DAS08 Manual do Utilizador descarregar pdf (Página 18)

CIO-DAS08 User's Guide Specifications

Table 3. Digital input/output specifications (digital connector – J2)

Digital type (digital I/O connector J2) 82C55

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

Number of channels 24 I/O

Output high 3.0 volts min @ -2.5 mA

Output low 0.4 volts max @ 2.5 mA

Input high 2.0 volts min, 5.5 volts absolute max

Input low 0.8 volts max, -0.5 volts absolute min

Power-up / reset state Input mode (high impedance)

Table 4. Interrupt specifications

Interrupts 2 - 7, jumper selectable

Interrupt enable Programmable

Interrupt sources External (Interrupt In), rising edge; on-board counter, jumper selectable

Counters

Table 5. Counter specifications

Counter type 82C54

Configuration 3 down counters, 16-bits each

Counter 0 — Independent, user

configurable

Source: User connector (Counter 0 In)

Gate: User connector (Gate 0)

Output: User connector (Counter 0 Out)

Counter 1 — Independent, user

configurable

Source: User connector (Counter 1 In)

Gate: User connector (Gate 1)

Output: User connector (Counter 1 Out)

Counter 2 — Independent, user

configurable

Source: PC SysClk via divide by 2 circuit

Gate: User connector (Gate 2)

Output: User connector (Counter 2 Out)

Clock input frequency 10 MHz max

High pulse width (clock input) 30 ns min

Low pulse width (clock input) 50 ns min

Gate width high 50 ns min

Gate width low 50 ns min

Input low voltage 0.8 V max

Input high voltage 2.0 V min

Output low voltage 0.4 V max

Output high voltage 3.0 V min

Power consumption

Table 6. Power consumption specifications

Parameter Specification

+5V 250 mA typical, 312 mA max

+12V 15 mA typical, 21 mA max

-12V 25 mA typical, 35 mA max

Environmental

Table 7. Environmental specifications

Operating temperature range 0 to 50 ° C

Storage temperature range -20 to 70 ° C

Humidity 0 to 90% non-condensing

1 2 ... 13 14 15 16 17 18 19 20 21

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