National Instruments NI 1450 Series TTL Inputs and Outputs, TTL Inputs, TTL Outputs, Optically Isolated Inputs and Outputs Isolated (Current Sinking) Inputs

Appendix B Specifications
NI 1450 Series Compact Vision System User Manual B-2 ni.com
TTL Inputs and Outputs
Digital logic levels
TTL Inputs
Number of channels................................2
Maximum pulse rate...............................2 MHz
Minimum pulse detected........................200 ns
TTL Outputs
Number of channels................................10
Output voltage range..............................0 V to 5 V
Maximum pulse rate...............................2 MHz
Optically Isolated Inputs and Outputs
Isolated (Current Sinking) Inputs
Number of channels................................13
Input voltage range.................................0 V to 30 V
Input ON voltage.............................3.5 V to 30 V
Input OFF voltage............................0 V to 2 V
Turn-on current.......................................4 mA, typical;
7.1 mA, minimum;
14 mA, maximum
(current limited)
Level Minimum Maximum
Input low voltage (VIL)0 V 0.5 V
Input high voltage (VIH)2.2 V 5 V
Output low voltage (VOL), at 5 mA 2.4 V —
Output high voltage (VOH), at 5 mA —0.4 V