# Bus Topology

In an RS485 setup without a repeater, a single trunk cable runs through the system, with devices connected in a daisy-chain manner. Short cables derivations (stubs) are also allowed but not recommended. Keep the derivation distance as short as possible. Other topologies are not allowed.

<figure><img src="https://3728520580-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FsqF9AC2WATFaFsPXv5oP%2Fuploads%2FHdgAgb5YTF1WwkoL7W9Q%2Fimage.png?alt=media&#x26;token=d172cf9b-b805-407c-a091-fffc33d47fd9" alt=""><figcaption><p>IS4310 RS485 Bus Topology</p></figcaption></figure>