Advantech TREK-550-A00E Manual page 29

4.3.5 DI/GPS Function Selection (SW2)
If the GPS module with Dead Reckoning function is used, the digital inputs 3/4 will be
used as inputs of GPS module. DIP switch (SW2) is used to select the function on DI 3/4
(Digital Input 3/4).
Table 4.7: Pin 9 of COM8 Function Selection (J3)
SW2.1
SW2.2
SW2.3
SW2.4
TREK-550 User Manual
Digital Input
OFF
ON
OFF
ON
26
GPS (for Dead-Reckoning)
ON
OFF
ON
OFF