The zone bus terminal block is a grey, removable, 4-terminal plug that fits into a board-mounted jack. Wire the removable zone bus terminal block plugs on the controller on the top row of the stacked connector, and other field controllers in a daisy-chain configuration using 3-wire twisted, shielded cable as shown in the following figure. See Table 1 for more information.
Figure 1. Zone bus terminal block wiring
| 1 | Terminating device on the zone bus |
| 2 | Zone bus terminal block plugs |
| 3 | Daisy-chained device on a zone bus segment |
| 4 | Connects to the next device on the zone bus. |
Note: The zone bus shield (SHD) terminal is isolated and can be used to connect (daisy
chain) the shields for zone bus wiring.