Physical Interface AW00123402000
54 Basler ace USB 3.0
5.9 Direct-coupled General Purpose I/O
(GPIO; Pin 1/Line 3, Pin 3/Line 4)
5.9.1 Introduction
The camera has two direct-coupled GPIO lines that are accessed via pins 1 and 3 of the 6-pin
connector on the back of the camera (see Figure 30).
The GPIO lines can be set to operate as inputs to the camera or to operate as camera outputs.
The GPIO lines are designated as Line 3 and Line 4 (see also Section 5.2.1 on page 46).
The direct-coupled GPIO lines are compatible with TTL signals.
The next sections describe the differences in the GPIO electrical functionality when the lines are set
to operate as inputs and when they are set to operate as outputs.
NOTICE
Applying incorrect electrical signals to the camera’s GPIO lines can severely damage the camera.
1. Before you connect any external circuitry to a GPIO line, we strongly recommend that you
set a GPIO line to operate as an input or as an output (according to your needs).
2. Once a line is properly set, make sure that you only apply electrical signals to the line that are
appropriate for the line’s current setting.
Direct-coupled GPIO lines have the advantage of working with very short delays
compared to opto-isolated I/O lines.
The direct-coupled GPIO lines are, however, distinctly more susceptible to
electromagnetic interference.
We therefore strongly recommend to only use the direct-coupled GPIO lines when
significant electromagnetic interference will not occur.
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