National Instruments NI DIDS-2103 User Manual page 110

General purpose digital sensors typically have three wires: power (typically +5V), ground, and signal. The preferred
method for wiring a digital sensor to the NI 9760 is to wire the sensor power wire to one of the 5V OUT pins (pins
1-3, 20-22), the sensor ground wire to one of the sensor ground pins (pins 10-13, 29-31), and the sensor signal wire
the IN+ pin corresponding to the desired channel (pins 4-9). Then, wire a DC power supply capable of providing a
voltage between 5 and 30 V to pins 19 (5-30V IN) and 36 (GND). Users should be sure to keep the ground of the DC
supply for their sensors separate from the ground of DC supply providing power to the cRIO-9066.
Supported Pattern Types
The EPT function supports three crank and cam pattern types described in Table 4.6.a below.
Pattern Type
N - M
N + 1
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EPT Type
Selections
N-M patterns have N evenly spaced teeth and M
missing adjacent teeth (gap) on the crankshaft
trigger wheel. M is limited to 1 or 2 missing teeth. N
is stated in terms of evenly spaced teeth, as if there
were no missing teeth. For example, a 60-2 pattern
would consist of 58 physical teeth followed by two
missing teeth. EPT N-M function can be configured
EPT N-M 7 to track 360 or 720 degrees depending upon an
optional camshaft input. When tracking 360 degrees
for 2-stroke engines, the camshaft input is ignored.
When tracking 720 degrees for 4-stroke engines,
the camshaft input signal must be TRUE during
every other crank tooth gap. The cam signal can be
manipulated using the offset and extend functions to
satisfy this requirement.
N+1 patterns have N evenly spaced teeth and a
single additional tooth (Plus1), placed between
two evenly spaced teeth, on the crankshaft trigger
wheel. The Plus1 tooth can be located at one of two
different positions between two evenly spaced teeth,
advanced or retarded. N is stated in terms of evenly
spaced teeth, as if there were no additional teeth. For
example, a 6+1 pattern would consist of 6 physical
evenly spaced teeth and an additional physical tooth
EPT N+1 9
placed between two evenly spaced teeth. EPT N
+1 function can be configured to track 360 or 720
degrees depending upon an optional camshaft input.
When tracking 360 degrees for 2-stroke engines, the
camshaft input is ignored. When tracking 720 degrees
for 4-stroke engines, the camshaft input signal must
be TRUE during every other Plus1 tooth. The cam
signal can be manipulated using the offset and extend
functions to satisfy this requirement.
Pattern Description