NI 9478 Operating Instructions and Specifications
14
ni.com
Overcurrent Refresh
The NI 9478 provides an overc
u
rrent refresh setting that enables
a channel to a
u
tomatically recover within the specified overc
u
rrent
refresh period if the channel exceeds its c
u
rrent limit threshold.
If overc
u
rrent refresh is disabled, the channel remains off after an
overc
u
rrent condition
u
ntil software sends a command to t
u
rn the
channel back on. Refer to the software help for more information
abo
u
t overc
u
rrent refresh. Visit
ni.com/info
and enter
c
s
erie
s
doc
for information abo
u
t C Series doc
u
mentation.
Safe Operating Current
The maxim
u
m allowable o
u
tp
u
t c
u
rrent depends on the o
u
tp
u
t
freq
u
ency and cable lengths. Higher o
u
tp
u
t c
u
rrents, higher o
u
tp
u
t
freq
u
encies, and longer cable lengths can contrib
u
te to power
dissipating and heat increasing in the NI 9478. The
section gives allowable c
u
rrent and freq
u
ency specifications if yo
u
u
se 2 meters of cabling. For other operating conditions, yo
u
can
find the safe operating specifications for the NI 9478 by calc
u
lating
the percentage of the total allowable power each o
u
tp
u
t channel
dissipates given the o
u
tp
u
t c
u
rrent, freq
u
ency, and cable length
