Contec AD16-64(LPCI)LA, Руководство пользователя

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3. External Connection
AD16-64(LPCI)LA
39
Digital I/O signals, Counter signals and Control
signals Connection
The following sections show examples of how to connect digital I/O signals, counter I/O signals, and
other control I/O signals (external trigger input signals, sampling clock input signals, etc.).
All the digital I/O signals and control signals are TTL level signals.
Figure 3.9. Digital Input Connection
Figure 3.10. Digital Output Connection
Counter input signal control
The counter gate control input (see Connector Pin Assignment in Chapter3) enables or disables the
external clock input to the counter. You can use this function to control the external clock input to the
counter. The external clock input to the counter is enabled when the input is "High" and disabled when
the input is "Low". As the pin has an internal pull-up on the board (or card), the default if not
connected is "High". As a result, the external clock for the counter is enabled if this pin is not
connected.
Do not short the output signals to analog ground, digital ground, and/or power line. Doing so may
damage the board.
Reference
For the operation timings for control signal input, see “Control Signal Timings” in Chapter 6
“Hardware”.
Digital Input
Digital Ground
10k
Ω BOARD CN1 Cable Target
Digital Ground
BOARD CN1 Cable Target
Digital Output
I
OL
=24mA
CAUTION