User Manual

System overview
Automation level
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3.2 Automation level
The Desigo PX automation system meets all the requirements for the control and monitoring of heating,
ventilation, air conditioning systems and other building services. Desigo PX with its programmable
automation stations and graded range of operator units is a scalable and open system.
D-MAP programming language
The starting point for the engineering of the application functions is the range of user-friendly application
blocks and function blocks in the D-MAP (Desigo Modular Application Programming) programming
language. D-MAP is optimized for applications for technical building installations and is based on the IEC
1131 standard. The graphical user interface of the Xworks Plus (XWP) engineering software ensures an
efficient approach.
System functions
All PX automation stations have comprehensive system functions, such as alarm mangement, time
schedules, trend histories, time synchronisation, global data distribution, and life check, that work
completely autonomously.
BACnet communication for maximum openness
Devices on the automation level communicate with each other and with the management platform and the
operating devices via the BACnet protocol.
The use of BACnet/IP or BACnet/LonTalk underlines the openness of the system and allows the easy
integration of systems and components from third-party manufacturers.
Automation stations and system controllers
PX Modular
The Desigo PX range of programmable modular automation stations provides maximum flexibility for
controlling and monitoring building services. Comprehensive system functions, such as alarm management,
time schedules and trend histories, meet all requirements for technical building installations.
The PXX-Lxx extension modules let you connect LonWorks devices and third-party devices.
The PXX-PBUS extension module lets you integrate PTM IO modules.
The PXA40-Tx option modules provide functions, such as web operation.
TX-I/O
Desigo TX-I/O modules provide the interface between PX Modular and the field level devices, the actuators
and sensors.
A range of configurable and flexible I/O modules are available for signalling, measuring, metering, switching
and controlling.
Some modules can be manually operated according to ISO 16484, and have an LCD display with
configurable LEDs.
The integrated isolating-terminals facilitate the hardware test during commissioning.
TX Open
TXIx.OPEN lets you integrate third-party systems, such as M-Bus meters, pumps (Grundfos, Wilo) and
variable speed drives (Siemens G120P), and connect intelligent aggregates, e.g., chillers, via the Modbus
protocol.
PX Compact
The Desigo PX range of programmable compact automation stations with integrated I/Os provides
optimized solutions for small to mid-sized technical building installations. Comprehensive system functions,
such as alarm management, time schedules and trend histories, meet all requirements for technical
building installations.
PX Compact with island bus
The easy to install PXC22.1…D and PXC36.1…D compact automation stations offer increased flexibility
due to the island bus.
Properties:
● Up to 52 physical I/Os
● Integration of up to 5 subsystems, such as Modbus, M-bus, with up to 400 data points
PX Open
PX Open system controllers let you integrate third-party devices via Modbus, M-Bus, KNX and other
protocols. System functions, such as alarm management, time schedules, trend data storage and flexible
programming are available.