Wire the SA bus terminals in a daisy-chain configuration. Use a stranded four-wire twisted and shielded cable as shown in the following figure. The four-wire cable consists of two twisted pairs. The first twisted pair is the positive and negative wires and the second twisted pair is COM and SA PWR wires.
You can use the SA Bus positive and negative wires as a normal RS-485 port.
Figure 1. SA terminal wiring
| Callout | Description |
|---|---|
| 1 | Terminal on the first device |
| 2 | Terminal on the daisy-chained device |
| 3 | Connection to another device on the SA bus |
| 4 | Cable shield connection. You do not need to ground the cable shield. |
| 5 | Connection from another device on the SA bus |