72
Figure 14.2
Logic Input
Non-connected inputs are 0V potential (level 0).
Number of logic channels: from 1 to 16.
TTL level: 3.3V (protected up to 24V)
To create a rising edge, you only have to place a connection between the power input and output of the connector.
Similarly, to create a falling edge, you only have to remove this connection. You can also use an output signal TTL 3.3V.
14.2.1 Use
Plotting and display:
These channels are plotted on the right or left side of the paper according to the selected format.
They are displayed at the top or the bottom of the screen according to the selected position.
They are numbered from the right to the left.
Each channel is plotted between two dotted lines that show their limits. The height of reticules is min. 2mm for the plot.
External clock:
You can use the logic channel 16 (see figure "connector") as a data acquisition clock for the sampling in memory or file
mode. The data acquisition can then be made up to 500kHz.
Triggers:
You can use the logic channels to trigger the plotting and the data acquisitions (start and stop).
(AND or OR mode)
See chapter «
Trigger
».
14.3 Alarm outputs
Available contacts and outputs on the rear connector A, B, C and D. All outputs are TTL 5V.
When the device is powered off, A, B, C and D outputs have a 5kΩ impedance
14.3.1 Use
Signal for internal events to the outside toward the recorder (triggers on logic or analog channels, status of the printing
block
…
)
See chapter «
Use
».
14.4 Power supply output
There is a power supply output restricted to 0.2A (see figure "connector").
The voltage is the one of the 9-12V battery as a function of the charge and 15V is the charger is connected.
The ground of this power supply is the mechanical ground.
Thus, you can use this output to provide power to a sensor or an electronic circuit in order to manage the logic inputs.
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