Isolation domains: Field = galvanically isolated from the board, referenced to the customer’s field supply; Logic = board ground, shared with the logic supply return and the USB and RS-485 grounds. 

Connector locations, top view, colored by isolation domain

Figure 4. Enclosure panel markings.

Isolation domains: Field = galvanically isolated from the board, referenced to the customer’s field supply; Logic = board ground, shared with the logic supply return and the USB and RS-485 grounds. Connector locations are shown in Figure 3.