LAN-AD16f
3
Interfacing examples for digital channels
The following basic connection examples demonstrate the use of the digital inputs and outputs and the con-
nection of a counter to the LAN-AD16f. The pin assignment of the 37-pin D-Sub female connector is de-
scribed in chapter 2.4.
3.1
Connecting an optocoupler
Optocouplers provide optimum protection at
each input line. With them, it is possible to
connect higher voltages and to protect the
hardware from being destroyed.
The 3.9k
Ω
pull-down resistor sets the input
to
low
if no voltage is applied there.
In this regard, please also see application ex-
amples of the optocoupler you use.
Optocoupler boards with 8 or 16 inputs
are available at bmcm.
3.2
Connecting a counter or
incremental encoder
The connection of "Signal A", "Signal B"
and "Reset" is possible at any digital line.
At maximum performance (2
19
-1), the
counter is reset and starts from zero again.
3.3
Connecting an LED
Only so-called low-current LEDs can be
used, because they already work with 1mA
current.
Serial resistors in the output lines limit the
current and protect the hardware from being
destroyed.
Please also observe the total current listed
in the technical data (see chapter 8).
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