The scanner's auxiliary input signals can interface with various devices (such as proximity detectors). The auxiliary input signals are only detected when current flows between their AUX_IN pin and AUX_IN_COMMON pin. Therefore, an auxiliary input signal must be connected to a device that controls the current flow. When current is detected, the signal is reported as on; otherwise, it is reported as off. In software, you can generate an interrupt the moment the current is detected.
Each of the four available auxiliary input signals has one dedicated pin (AUX_IN3, AUX_IN4, AUX_IN5, and AUX_IN6, respectively) and shares its other pin (AUX_IN_COMMON) with the other auxiliary input signals.
You can connect the auxiliary input signals in a sinking or sourcing configuration. The auxiliary input signals share a common pin and must be in a sinking or sourcing configuration. The exact connection between the input signal, the connected device, and the power source depends entirely on the type of device you connect.
