National Instruments 8-Channel, 24 V Logic, Sinking Digital Input Device, NI USB-9421 Specifications

NI USB-9421 User Guide and Specifications 14 ni.com
Figure 10. Assembled High Voltage Screw Terminal Backshell
Specifications
The following specifications are typical for the range 0to 60 °C unless
otherwise noted. All voltages are relative to COM unless otherwise noted.
Input Characteristics
Number of channels................................8
Input type................................................Sinking
Digital logic levels
OFF state
Input voltage.............................≤5V
Input current.............................≤300 μA
ON state
Input voltage.............................11 to 30V
Input current.............................≥3mA
I/O protection
Input voltage....................................40 V max
Reverse biased voltage....................–30 V max
Input current....................................7 mA max, internally limited
Input delay time......................................100 μs max
Power Requirements
Power consumption from USB...............500 mA, max
Suspend mode..................................2.5 mA, max