Access PCI-DIO-24D(H) User Manual

 
  

 

 

• 

Logic High: 

 

2.0 to 5.0 VDC 

 

• 

Logic Low: 

 

-0.5 to +0.8 VDC 

 • Load: 

  ±20 

μA 

  

 

 

• 

Logic High: 

 

2.0 VDC min., source 32 ma 

 

• 

Logic Low: 

 

0.55 VDC max., sink 64 ma 

  

 

 • Type: 

  82C54 

programmable 

interval counters (up to three) 

 

• 

Output drive: 

 

Source 2.5 mA, sink 24 mA 

 • Input 

Gate: 

 TTL/CMOS 

compatible 

 • Clock: 

  On-board, 

1 

MHz 

crystal-controlled 

oscillator 

 

• 

Active Count Edge: 

Negative edge (falling edge) 

 

• 

Minimum Clock Pulse Width: 

30 ns high, 40 ns low 

 

• 

Timer Range:   

16 bits (x3 per i8254) 

 

• 

Power Output:   

Resettable 0.5A fused +5 VDC from computer bus 

  

 

 

• 

Basic Unit: 

 +5 VDC at 170 mA typical if no current is drawn from 

the auxiliary fused +5 VDC output 

 

• 

With One Counter: 

+5 VDC at 190 ma 

 

• 

With Two Counters: 

+5 VDC at 210 ma 

 

• 

With Three Counters:  +5 VDC at 230 ma 

  

 

 

• 

Operating Temperature Range:  0 °C. to 60 °C 

 

• 

Storage Temperature Range:  -50 °C. to +120 °C 

 

• 

Humidity: 

 

 

0 to 90% RH, non-condensing 

 • Size: 

   4.8" 

Long 

(122 

mm) 

 

Manual PCI-DIO-24DH 

7