To create a new bus system, select the option “Additional bus system” in the main node “Other DIN-rail device and bus systems”.
A “bus system” always represents a closed bus segment with its devices (e.g. ekey bus, RS485, DMX bus).
There may be several bus segments within a smart home system, for example:
- For Loxone, the “main bus” Loxone Link, which is extended with two further bus segments (Tree #1 and #Tree #2) via a tree extension. Three “Additional bus systems” should be created in the tool for this purpose, for example
- With Gira DCS, the IP gateway spans two buses, typically a bus segment for the outdoor devices (“Bus In” terminal) and the bus segment for the indoor devices (“Bus Out” terminal). Multiplexers can add additional bus segments.
A bus system can be configured with the following settings:
An important setting is the bus type with the current selection between a 2, 3 or 4-wire bus system. The interface provides information on which type should ideally be selected for which system.
A designation can be added to the bus system – this enables easier identification in the planning tree and the drawing.
The identifiers of the wires can also be assigned. In the case of page breaks, the identifiers are also rendered in the finished diagram at the page references.
Additional elements can be created below a bus system in the diagram, which (depending on their configuration) are connected to the bus system/bus segment.
- Other DIN-rail devices: are always connected to the bus system. With 4-wire bus systems, there is a selection option in the DIN-rail devices to determine whether they are connected to the bus system with 2 or 4 wires.
- Terminal blocks: the configured wires of the bus system appear in terminal blocks in the terminal type selection. This means that each wire can be connected separately to the wires of the bus system.
