BACnet/SC

The BACnet/SC data link allows you to create secure connections between the devices within a BACnet network. Communication is thus authenticated and encrypted. Communication is also possible between devices in different private IP-Networks. As of writing, the current Desigo system supports a building hub, multiple floor hubs, failover hubs and nodes¹, consisting of the Desigo CC management station, room controllers and system controllers².

¹ Indicative figure, actual Desigo system limits depend upon exact topology and load.

² Please consult the respective products’ datasheets for more details on their respective BACnet/SC support, for example, which minimum firmware version is required, node or hub functionality supported and system limits.

For further information on BACnet/SC, refer to the chapter on BACnet/SC networks in document A6V11159798 Application Guide for BACnet Networks in Building Automation.

To become more familiar with the functionality, watch the BACnet/SC video (on YouTube).

1	Task selector	2	Building structure
3	BACnet/SC topology	4	Toolbar
5	Details pane

① Task selector

Task	Description
Building Structure	Building structure
Central functions	Central functions
Device list	Device list
Application & device overview	Application & device overview
Certificates management	Certificates management
Network check	Network check
BACnet/SC	Current task

② Building structure

Setting	Description
Name	Shows the name of the building, floor, device etc. The names can be edited in the properties window. A symbol shows the function of the device.
		Device is a hub.
		For this device, the primary hub is assigned to an external 3^rd party hub. Note: There is no automatic verification of whether the address to the 3^rd party hub is correct.
		Device is a node with a primary hub.
		Invalid configuration.
		Device is a failover hub.
		For this device, the failover hub is assigned to an external 3^rd party hub.
		For this device, a failover hub is defined.
Description	Shows a description of the building, floor, device etc. The descriptions can be edited in the properties window.
Device type	Shows the respective device type: can be used as hub or node: PXC5, PXC7 used as node only: PXC4.E16, PXC4.E16-2, DXR2.E, PXC3, PXG3,Wx00-1, PXG3.Wx00-2, PXMx0.E/1.
Dev. Inst. #	Shows the respective device instance number.

③ BACnet/SC topology

Setting	Description
Name	Shows the name of the device connected to the BACnet/SC topology. Hubs are shown at the left side, nodes are grouped to within the respective hub.
Failover hub	Defines, if the device is used as a failover hub. A failover hub is used if the normal hub is not available. Note: Failover hubs can only protect the BACnet/SC nodes of the primary hub, not any (routed) non-BACnet/SC devices.
Failover building hub	Shows the failover hub when using a building hub configuration. Otherwise this field is empty.
Description	Shows a description of the device. The descriptions can be edited in the properties window.
Location	Shows the assignment of a device to a building, floor etc.
Device type	Shows the respective device type, e.g. PXC4.E16. PXC5/7, DXR2.E and PXC3 are supported.
SC network	Shows, to which BACnet/SC network the device belongs. This can be a private network or another network over internet.
SC network building	Show the network number if a building hub configuration is used. Otherwise this field is empty.
BACnet/IP	Enabled or Disabled. Select the corresponding column to open the drop-down menu, and enable/disable the BACnet IP communication of the device. Disabling BACnet/IP communication
BACnet/IP routing	Defines, if BACnet routing is active or not. BACnet routing must be activated to allow the communication between the BACnet/SC network and BACnet without secure connect network.
UDP port	Shows the assigned UDP port of this device.
IP network	IP direction of the device into the private network or for communication over LAN/WAN with another network.

④ Toolbar

Task	Description
Check	Checks the adjustments of the BACnet/SC network and shows a log file with the results.
Assign Hub	Assigns a device as a hub.
Unassign	Unassigns a hub or a node.

⑤ Details pane

The contents of the properties (details pane) vary depending on the selected element.
Building element details
Details pane of the device version ≤ 1.5
Room and segment details
Application template details
Group member details