Data Translation DT9816 Series, User Manual

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Wiring Signals to the Module
41
Connecting Counter/Timer Signals
DT9816 Series modules provide one counter/timer that you can use for the following
operations:
• Event counting
• Frequency measurement
• Continuous pulse output (rate generation)
To connect counter/timer signals to a DT9816, DT9816-A, DT9816-S, or DT9816-S-WTR
module, use the screw terminals on the module. To connect counter/timer signals to a
DT9816-OEM module, use the Analog Input connector.
This section describes how to connect counter/timer signals for these operation modes. Refer
to
page 65 for more information about using the counter/timers.
Connecting Signals for Event Counting
Figure 12 shows how to connect counter/timer signals to a DT9816 Series 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 67 for more information.
Figure 12: Connecting Counter/Timer Signals for an Event Counting Operation
Using an External Gate
Figure 13 shows how to connect counter/timer signals to a DT9816 Series 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.
Signal
Source
Ground
Counter 0 In
Ground
External
Gating
Switch
18
16
Counter
0 Gate
DT9816 Series
Module
19