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Opto-Coupled I/O Lines#

The opto-coupled I/O lines of your Basler camera are preconfigured to operate either as input or output lines.


  • Opto-coupled I/O lines are preconfigured to operate as input or output. You can't change the line mode of opto-coupled lines.
  • If your camera has opto-coupled lines, one of them is always a dedicated input line and another a dedicated output line.
  • Opto-coupled I/O lines have the advantage of being considerably more robust against EMI than GPIO lines.
  • Opto-coupled I/O lines have longer propagation delays (response times) compared to GPIO lines.
  • The minimum required pulse width for input triggers is longer compared to GPIO lines. Make sure to provide sufficient time for the camera's input circuit to react. For most cases, a pulse width of 100 μs should be long enough.

Common Tasks#

Task Feature
Determining the current status of one or all opto-coupled I/O lines (high / low) Line Status
Configuring triggered image acquisition Triggered Image Acquisition
Selecting an output signal for an opto-coupled I/O line Line Source
Inverting all input or output signals (high -> low, low -> high) Line Inverter

Sample Circuit Diagrams#

→ See Circuit Diagrams.

Timing Characteristics#

→ See I/O Timing Characteristics.