Connecting Counter/Timer Signals; Event Counting - Data Translation DT9812 Series User Manual

Connecting Counter/Timer Signals

DT9812, DT9813, and DT9814 Series modules provide one counter/timer that you can use for
the following operations:

• Event counting

• Frequency measurement
• Edge-to-edge measurement
• Continuous pulse output (rate generation)
This section describes how to connect counter/timer signals for these operation modes. Refer
to page 71 for more information about using the counter/timers.
Event Counting
Figure 12 shows how to connect counter/timer signals to the module to perform an event
counting operation using an external gate.
In this example, the counter counts the number of rising edges that occur on the Counter 0 In
signal when the Counter 0 Gate signal is in the active state (as specified by software). Refer to
page 73 for more information.
Signal
Source
Figure 12: Connecting Counter/Timer Signals for an Event Counting Operation
Figure 13 shows how to connect counter/timer signals to the module to perform an event
counting operation without using a gate (also called a software gate). The counter counts the
number of rising edges that occur on the Counter 0 In signal.
Ground
Counter 0 In
Counter
External
0 Gate
Gating
Switch
Ground
Using an External Gate
Wiring Signals to the Module
DT9812, DT9813, or
DT9814 Series Module
19
18
16
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