User Manual

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Siemens Schweiz AG
Industry Sector – Building Technologies Division
Gubelstraße 22, CH-6300 Zug, Switzerland
Press Relations: Petra Krokowski
Phone: [phone]
E-mail: [e-mail]
Siemens AG
Industry Sector – Building Technologies Division
Friesstraße 20, 60388 Frankfurt
groups and the chilled-water system are incorporated into the demand-based control strategy. The
required water volume is calculated, controlled and monitored based on demand, either by sensors
which detect the weakest spot in the system in terms of energy flow, or by the corresponding
heating/cooling consumers. The control system is enhanced by comprehensive energy
management functions which extend from the room level to the heating/cooling generators and
ensure demand-based operation.
Topologically speaking, the instrumentation and control/building automation network is divided into
ten main information areas and encompasses 5,000 datapoints. The main information areas are
connected to the buildings via fiber optic cables, and within the buildings via a TCP/IP network.
The complex cooling plant with its proprietary control technology is connected to the building
automation system via Modbus for energy guidance and monitoring. BACnet is used for data
coupling to the electrical systems to control interdisciplinary functions such as the weather station
with wind monitor, blinds, as well as the operating panels which control building services,
ventilation and lighting in the conference rooms. Other connected systems include the smoke
extraction units with a combined capacity of 500,000–600,000 m
3
/h, the transformer stations (Retail
building with two 2 MW transformers, Office building with three 3.75 MW transformers) as well as
the emergency power supply/emergency generator system. The topology of the building
automation system allows existing and future assets to be easily integrated into the system
structure.
Remote access was added to provide support for operations, service work and complex software
maintenance tasks required for the process stations. When designing the building automation
system for the building complex, IPM focused on room flexibility, upgradability, addition of new
control groups and a sensible control cabinet layout in order to facilitate operation of the systems.
For example, the cabinet doors have controls for manual operations to make it easier to perform
maintenance tasks and energy efficiency measures.
*About the authors
Ralf Habermann, managing director of IPM Gebäudeleittechnik GmbH
Thomas Kerz, head of the Systems business segment in the CPS (Control Products & Systems)
business unit, Building Technologies Division Germany
Helmut Vogel, head of the CPS business unit for Bavaria, Building Technologies Division Germany