©
National Instruments Corp.
23
NI 9512 Operating Instructions and Specifications
Sinking 4 mA ....................... 0.5 V max
Digital logic levels, differential (Step/Dir(+) – Step/Dir(–))
At 20 mA ............................. ±1 V min
At 12 mA ............................. ±1.5 V min
At 4 mA ............................... ±2 V min
Max p
u
lse rate ............................ 5 MHz
Contin
u
o
u
s o
u
tp
u
t c
u
rrent
on each channel .......................... ±20 mA
P
u
lse width ................................. Approximately 50% of the
period,
u
p to 6.4
μ
s max
O
u
tp
u
t mode............................... Programmable: step and
direction, or CW/CCW
Active state ................................. Programmable: high or low
Drive enable o
u
tp
u
t
O
u
tp
u
t type ................................. Programmable: sinking or
so
u
rcing
Voltage range.............................. 0 to 30 V
V
s
u
p
inp
u
t.................................... 19 to 30 V
Contin
u
o
u
s o
u
tp
u
t c
u
rrent (
I
0
)
on each channel .......................... ±100 mA max