National Instruments NI 9421

© National Instruments Corp. 15 NI 9421/9423
I/O protection
Input voltage
NI 9421 ................................ 40 V max
NI 9423 ................................ 35 V max
Reverse-biased voltage............... –30 V max
Input current
NI 9421 ................................ 7 mA max,
internally limited
NI 9423 ................................ 8.5 mA max,
internally limited
Input delay time
NI 9421....................................... 100 μs max
NI 9423....................................... 1 μs max
MTBF
NI 9421....................................... 2,086,204 hours at 25 °C;
Bellcore Issue 2, Method 1,
Case 3, Limited Part Stress
Method