Contemporary Control Systems BASrouterLX Installation Guide - Manual (Page 7)

TD120100-0IC
7
For devices that share a power source with our product, see Figure 6 for proper 2-
wire bus connections and Figure 7 for proper 3-wire bus connections.
Figure 6 — 2-wire EIA-485 Bus with Shared Power Source
Figure 7 — 3-wire EIA-485 Bus with Shared Power Source