NI 9421/9423
14
ni.com
Specifications
The following specifications are typical for the range –40 to 70 °C
u
nless otherwise noted. The specifications are the same for the
NI 9421 and the NI 9423
u
nless otherwise noted. All voltages are
relative to COM
u
nless otherwise noted.
Input Characteristics
N
u
mber of channels.......................... 8 digital inp
u
t
channels
Inp
u
t type .......................................... Sinking
Digital logic levels
OFF state
Inp
u
t voltage
........................≤
5 V
Inp
u
t c
u
rrent (NI 9421)
........≤
300
μ
A
Inp
u
t c
u
rrent (NI 9423)
........≤
150
μ
A
ON state
Inp
u
t voltage ........................ 11–30 V
Inp
u
t c
u
rrent
.........................≥
3 mA
