Figure 3.7 Pin Definition Of Cn2 - Advantech PCIE-1750U User Manual

Extra Connection
CN2 provides two extra connections which are equivalent to the GND/PCOM pin on
CN1. It brings extra current tolerance to PCIE-1750U/UH. The pin on CN2 should be
connected whenever the total current of IDO is higher than 3.2A. The Pin assign-
ment:
Pin 1: PCOM, used in source type (PNP) connection.
Pin 2: GND, used in sink type (NPN) connection.

Figure 3.7 Pin definition of CN2

15 PCIE-1750U/UH User Manual