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OMB-DAQ-2416-4AO User's Guide Functional Details
23
Figure 18. Digital I/O external resistor configuration
Counter input terminals (CTR0, CTR1)
Two 32-bit event counters are built into the OMB-DAQ-2416-4AO. Each counter accepts frequency inputs up
to 1 MHz.
Refer to the "Screw terminal pin out" diagrams starting on page 11 for the location of these pins. The internal
counter increments when the TTL levels transition from low to high. The counter can count frequencies of up to
1 MHz.
47 kΩ
DIO0
DIO1
DIO2
DIO3
DIO4
DIO5
DIO6
DIO7
+5 V
+ V
External pull-up resistor
JP1
Internal jumper
disabled (placed on
center pin only)