Contec AI-1204Z-PE, Справочное руководство, Страница: 39 / 85

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Installation
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AI-1204Z-PE Reference Manual
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3. Connecting Digital I/O & Control
Signals
Digital I/O signals can be used as control I/O signals (external trigger input signals, sampling clock
input signals, etc.). The following section shows examples of how to connect signals.
1. Digital I/O signals and Control signals Connection
This section shows an example of how to connect digital I/O signals and the control signals(external
trigger input signals and sampling clock input signal) using flat cable.
User can use an optional cable (DT/E1) or 15-pin D-SUB connector with bracket (DT-E3)and to
connect your external devices to CN5.
Pulse (width : about 50nsec) synchronized with internal sampling clock is output to the AI Status
Output pin. However, if the sampling clock setting is set to the external sampling clock input, level
“L” is always output.
AI Status Output pin is an output in positive logic.
All the digital I/O signals and control signals are LVTTL level signals.
Digital Input Connection
Digital Output Connection
CAUTION

Do not connect any output signal to the analog or digital ground. Do not interconnect
outputs. Doing either can cause a malfunction.

If connected to each output, a pull-up resistor must be about 10 k Ω to pull up with a 3.3V
power source.

Each input accepts 5V TTL signals.
For the operation timings for control signal input, see ”Timing of External Control Signals”.