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The OMB-DBK7 frequency-input
card provides OMB-LOGBOOK
and OMB-DAQBOARD-2000
Series data acquisition systems
with four channels of
frequency-measurement capability.
The
card measures the input signal’s
frequency and converts the
frequency to a voltage, which
can then be measured by the
data acquisition system. The
OMB-DBK7’s output is read by the
data acquisition system along with
any other analog channels included
in the analog scan group, allowing
easy correlation of readings from
the OMB-DBK7 with other test
parameters. As many as as sixty-four
OMB-DBK7’s can be connected
to one OMB-LOGBOOK and
OMB-DAQBOARD-2000 series
acquisition system, for a total of
up to 256 channels.
Analog Inputs
The OMB-DBK7 accepts
AC-coupled analog inputs up to
80 V p-p. Each of its channels is
equipped with a low-pass input filter
that is jumper selectable for 100
kHz, 300 Hz, or 30 Hz.
The card can accommodate 1 Hz to
100 kHz measurement of signals
from 50 mV to 80 V p-p.
Digital Inputs
The OMB-DBK7’s digital inputs,
which can measure signals from
0.001 Hz to 950 kHz, feature TTL
Schmitt-trigger levels and can accept
DC-coupled signals from -15 V to
+15 V. The OMB-DBK7’s digital
inputs are equipped with
pull-up resistors for use with relays
or switches.
Frequency Range
The OMB-DBK7 provides 12-bit
resolution at any frequency from
1 Hz to 950 kHz.
Update Rates
For ranges from 1 Hz to the user-defined
maximum upper range
boundary, the voltage conversion
update will occur every 2 to 4 ms
or the period of the input frequency,
whichever is greater. With a range
of 0 to 10 kHz, the OMB-DBK7 will
update every 2 to 4 ms. If the range
is 0 to 60 Hz, the output will update
every cycle or 16.6 ms.
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† All dollar amounts on this site are shown in Singapore currency.
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