User Manual

Table Of Contents
System overview
Communication principles
3
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Large system
PX site
PX site is a means of structuring large PX projects. Desigo room automation stations are not part of a PX
site.
In a PX site one PX automation station is defined as the primary server and all other PX automation
stations are defined as backup servers. Every automation station can be defined as the primary server.
The primary server carries out system functions, such as time synchronization, life check and the
distribution of global data:
Time synchronization: The primary server distributes the current time to the backup devices.
Life check: The backup servers detect the failure of the primary server and the primary server detects
the failure of the backup servers. If a server fails, an alarm message is sent. If the primary server fails,
another automation station must be defined manually as the primary server.
Distribution of global data: Global objects are available on all PX automation stations. The primary
server synchronizes changes, e.g., calendar object, notification class object, that are made on the
primary server to the backup servers.
Handling a PX Site in Desigo clients
When an operating device starts, it searches for all primary servers and offers a log in to the PX site.
A Desigo CC site can contain several PX sites and third-party devices. Desigo CC registers itself as a global
alarm recipient for the PX site on the primary server.
3.8 Communication principles
Desigo uses open communications to connect various technical building systems based on open and
standardized data interfaces:
BACnet is used from room automation to the management level
KNX®, DALI, EnOcean® and LonWorks® are used in room automation and decentralized secondary
processes
M-bus, Modbus, OPC, MS/TP, and other interfaces are used for connecting third-party devices and
systems
°C
°C
°C
°C
°C
°C
KNX
@
Desigo CC
PXG3.M
Router
PX
G3.W100/200-1
Web interface
Web client
PTM-I/O-
Modules
PXG3.L
Router
PXC12/22/36-E.D
Compact
Desigo Control Point
BACnet
Third-party system
Third-party
integration
Third-party
integration
BACnet
Third-party
integration
DXR1
QMX7.E38
Touch room
operator units
Remote access
RDF/RDG
Thermostats
RXM21/39.1
Fan coil unit I/O boxes
GAMMA
Pushbutton,
presence detector etc .
AQR25..
Room
sensor
QMX3
Room units
AQR25..
Room
sensor
QMX3
Room units
AQR25..
Room
sensor
DALI
Third-party devices
DXR2.E...
Room automation
BACnet MS/TP
KNX
Sinteso
CERBERUS PRO
PXC50/100/
200-E.D
Modular
TXI...
TX Open
Ethernet
DSL-
Modem
DSL modem
Desigo Control Point
PXC50/100/
200-E.D
Modular
iValve
DXR1
E-Mail
Pager
Mobile
phone
PXC001-E.D
System controller
PXC001-E.D
System controller
L W
ON ORKS
Third-party
devices
TX-IO
Modules
PXC50/100/
200.D
Modular
DXR2.M
Room automation
BACnet/IP
RXB21.1
RXB22.1
PXC12/22/36.D
Compact
BACnet/LonTalk
BACnet/IP