NI 9512 Operating Instructions and Specifications
24
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O
u
tp
u
t impedance (
R
0
) ............... 0.3
Ω
max
O
u
tp
u
t voltage (
V
0
) so
u
rcing
...... V
sup
– (
I
0
R
0
)
O
u
tp
u
t voltage (
V
0
) sinking
........ I
0
R
0
Min o
u
tp
u
t p
u
lse width .............. 100 µs
Active state ................................. Programmable: on or off
Motion I/O
Encoder 0 Phase A/B and Index inp
u
ts
Type ............................................ RS-422 differential or
single-ended inp
u
ts
Digital logic levels, single-ended
Voltage ................................. –0.25 to 5.25 V
High, V
IH
.............................. 2.0 V min
Low, V
IL
............................... 0.8 V max
Digital logic levels, differential (Phase(+) – Phase(–))
Inp
u
t high range ................... 300 mV to 5 V
Inp
u
t low range .................... –300 mV to –5 V
Common-mode voltage
1
...... –7 to 12 V
1
Common-mode voltage is the average of Phase+ and Phase–.