Contec AIO-120802LN-USB, User Manual

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3. Connection and Installation
AIO-121602LN-USB, AIO-120802LN-USB
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Counter signals and Control signals Connection
The following sections show examples of how to connect counter I/O signals, and other control I/O
signals (external trigger input signals, sampling clock input signals, etc.).
All the counter I/O signals and control signals are TTL level signals.
Figure 3.24. Counter input and Control input Connection
Figure 3.25. Counter Output Connection
About the counter input control signal
Counter Gate Control Input (refer to the chapter 3 Connector Pin Assignment) acts as an input that
validate or invalidate the input of an external clock for the counter. This function enables the control of
an external clock input for the counter. The external clock for the counter is effective when input is
"High” and invalid when input is "Low". If unconnected, it is a pull-up in this product and remains
"High". Therefore the external clock for the counter is effective when the counter gate control input is
not connected.
- Do not short the output signals to analog ground, digital ground, and/or power line. Doing so may
damage the product.
- If connected to each output, a pull-up resistor must be about 10k
Ω
to pull up with a 5V power
source.
- Each input accepts 5V TTL signals.
Reference
For the operation timings for control signal input, see “Control Signal Timings” in Chapter 6
“Hardware”.
CAUTION