Measurement Computing CIO-DAS08 - Manual (Page 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
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