User Manual

BACnet networks with MS/TP trunks
Application examples
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Central function 1st floor
Tenant A
Floor 1
Tenant B
Floor 2
Tenant C
Floor 3
Tenant D
The entire building,
across floors
AS500
Scheduler for
shading, building
occupancy
SchedSh0
Scheduler, shading,
occupancy, ground
floor
SchedSh1
Scheduler, shading,
occupancy, 1st floor
SchedSh2
Scheduler, shading,
occupancy, 2nd floor
SchedSh3
Scheduler, shading,
occupancy, 3rd floor
AS500
Scheduler for
shading, system
operation
SchedSh6
Scheduler, shading
system operation
ground floor.
SchedSh7
Scheduler, shading
system operation
1st floor.
SchedSh8
Scheduler, shading
system operation
2nd floor.
SchedSh9
Scheduler, shading
system operation
3rd floor.
Central emergency
shading (overall)
CenEmgShd
Central protection
function shading
CenPrtShd
Central service
function shading
CenSrvShd_EG CenSrvShd_1OG CenSrvShd_2OG CenSrvShd_3OG
Central facade
shading west
CenFcdShd_W
Central facade
shading south
CenFcdShd_S
Central facade
shading east
CenFcdShd_E
Hot water supply
chain
SplyHw
Supply chain chilled
water
SplyChw
Recommendation: Network components
● Siemens SCALANCE XB005 – Optional, as edge switch for cabling the BACnet-MS/TP IP router
PXG3.M in the event the maximum cable length for the BACnet-MS/TP network is exceeded.
● Siemens SCALANCE XB005 - At the distribution level in the riser zones.
● Siemens SCALANCE XB205 - At the distribution level with port mirroring for diagnostics.
IT security and IT basic protection
The elements of infrastructure, IT systems, networks, and applications must be discussed under the
aspects of security and appropriate measures need to be developed. Customer, domestic, or industry
guidelines and directives must be observed under all circumstances.
For additional details, see
IT security on installations with Desigo (CM110663) and Practical Guide on IP
Networks in Building Automation and Control Systems (CM110668).
Summary
The following tables show how to depict all devices and network components in a small project.
Plant category Number of IP devices Number of MS/TP devices
PXC primary plants 5
DXR2 individual room control & central
functions
1 120
PXC00-E.D system controller, building scope 1
PXG3.M BACnet-MS/TP IP router 4
Reserves 5% 1 6
Amount 12 126