Wire the RS-485 terminals in a daisy-chain configuration. Use a stranded three-wire twisted and shielded cable as shown in Figure 1. The three different wires are the positive bus, the negative bus, and the COM.
Figure 1. RS-485 wiring
| Callout | Description |
|---|---|
| 1 | Terminal on the first device |
| 2 | Terminal on the daisy-chained device |
| 3 | Connection to another device on the RS-485 bus |
| 4 | Cable shield connection. Do not ground the cable shield. |
| 5 | Connection from another device on the RS-485 bus |