National Instruments PC-DIO-96, User Manual

Page: 67 / 105

© National Instruments Corporation A-1 PC-DIO-96 User Manual
Appendix A
Specifications
This appendix lists the specifications of the PC-DIO-96. These specifications are typical at 25
°
C, unless otherwise
stated. The operating temperature range is 0
°
to 70
°
C.
Digital I/O
Number of channels ..................................................... 96 I/O
Compatibility ............................................................... TTL
Absolute max voltage rating ........................................ -0.5 to +5.5 V with respect to GND
Handshaking ................................................................ Requires 1 port
Power-on state .............................................................. Configured as inputs
Data transfers ............................................................... Interrupts, programmed I/O
Digital Logic Levels
Input Signals
Pins 1–48, 51–98 ...................................................... Level
Min Max
Input logic high voltage 2.2 V 5.3 V
Input logic low voltage -0.3 V 0.8 V
Input current
(0 < Vin < 5 V)
-1.0
µ
A 1.0
µ
A
Output Signals
Pin 49 (at +5 V) ............................................................ 0.5 A max
Pin 99 (at +5 V) ............................................................ 0.5 A max
Note: The total combined current output from pins 49 and 99 may be limited by the available current from
your computer's power supply. To determine the available current, subtract the maximum power
consumption of the board from the maximum current per slot. The difference, if less than 1 A, is the
maximum combined current available to pins 49 and 99. If the difference is equal to or greater than
1 A, the maximum current available is restricted by the limitations of the connector, as shown previously.
If your external circuitry requires 0.5 to 1 A of current, you should connect pins 49 and 99 in parallel in
order to distribute the current.