How To Connect the S4 Open BACnet N2 Router
The S4 Open BACnet N2 router uses male DB9 connectors for its four N2 Bus Ports. These can be connected to the N2 Bus with a standard female DB9 breakout board. The N2- connects to the DB9 pin 1. The N2+ connects to the DB9 pin 2. See below for the diagram.