Foto: fotografie-grimm-leinefelde

COMFORT AND ENERGY EFFICIENCY / page 06

LIBRARIES FOR HVAC APPLICATIONS / Page 20

ENERGY STORED ON ICE / Page 16

direct buildingInformation for Building Technology, March 2013

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NEW LIGHTING STANDARD REPLACES OLD STANDARD LIGHTING Page 04

COMFORT AND ENERGY EFFICIENCY Page 06

1-WIRE TECHNOLOGY EFFICIENTLY INTEGRATED Page 08

SECURE CONNECTIONS FOR FINE-STRANDED WIRES Page 11

COMPETING IN A DECATHLON AGAINST THE SUN Page 12

ENERGY STORED ON ICE Page 16

Linect® – The COMPLETE PORTFOLIO Page 19

LIBRARIES FOR HVAC APPLICATIONS Page 20

SIMPLICITY PAIRED WITH HIGH FUNCTIONALITY Page 22

IMPRINT Page 24

CONTENTS

COMPETING IN A DECATHLON AGAINST THE SUN / Page 12

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Dear reader,

“In March, the farmer spans his teams to prepare his fields, woods, and streams.” It is appropriate that these lines from an old German folk song dance through my head upon the appearance of this WAGOdirect building magazine. March is – in a metaphorical sense – very similar at WAGO, only our fields and woods are events like the ISH Trade Fair. At the world’s leading trade fair for building, energy and air-conditioning technology in Frankfurt, we will shine the spotlight on our newest products, and primarily on our individu-alized consultations, which provide our customers with solutions tai-lored to their needs.

For a glimpse into what such projects can look like, read on! For ex-ample, Leitec combined the WAGO-I/O-SYSTEM with automation, energy and building technology to make their new company head-quarters especially efficient. WAGO developed a lighting concept for BMW that reduces lighting power consumption in the production facilities by more than 30 percent, and which is being gradually expanded as the new standard for the company. We were also ac-tive in university research: The team from RWTH Aachen used our automation components in their “Counter Entropy House” to achieve one of the highest honors at the “Solar Decathlon Europe 2012” in Madrid.

The new HVAC macros for the WAGO-I/O-SYSTEM demonstrate that standardization, ease of operation, and energy efficiency are not excusive at all. They provide specialists with ready-to-use solu-tions allowing them to perform a wide variety of applications at the push of a button. Expensive programming falls by the wayside be-cause individual adaptation is carried out using parameter settings. Solutions like these, paired with your good ideas and creativity, pro-vide the best conditions for a “successful harvest”!It is in this sense that I wish you the best of times while reading WAGOdirect building!

Best regards,

Karl-Heinz SandersManager of Market Management Building Automation

CONTENTS EDITORIAL

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■ For decades, BMW has been a household name among car and motorcycle enthusiasts alike, and now the same holds true for build-ing and automation engineering experts. While the first group asso-ciates the brand with innovative motors and vehicles, the latter thinks of a new lighting control system, which lowers the energy costs of the popular Munich-based company by around 30 percent. BMW is gradually expanding this solution based on WAGO components to make it a company-wide standard as part of its sustainability strategy.

Environmentally responsible action is only really effective when both sides of the coin are taken into account: the product itself, along with its entire development process. BMW is an automotive manufacturer that places priority on ecological and social aspects; as such, the company has been a permanent member in the “Dow Jones Sustainability Group Index” since 1999. And to ensure that it will also remain on the stock index for companies exercising sustain-able business practices in the future, the Munich-based company is continuously working on programs for active energy optimization.

NEW LIGHTING STANDARD REPLACES OLD STANDARD LIGHTINGWAGO’s newly developed lighting concept reduces lighting power consumption in BMW production facilities by more than a quarter

■ Building Lighting under ScrutinyOne such measure even applies greater scrutiny to the existing light-ing technology in the production facilities. This project was undertak-en even though substantial optimization had already been achieved recently in this sector using a new central I&C system. This included, among other improvements, switching off the main lighting in the production facilities during idle times. Likewise, BMW was already employing the possibility of switching off individual phases in the three-phase power bus as needed. However, without making any changes to the busbars, which were installed with traditional elec-tronic ballasts, the potential for savings was soon exhausted.A quick glance at the lighting plan from that time sufficed to show management how far the lights were from the desired optimum: All lights had been planned based on the reduction in luminosity that would occur as the lights aged. However, because the techni-cal expense for frequent manual adjustment would have been too costly, and the technology necessary for automatic adjustment had not yet been developed, the lights were installed from the begin-ning with significantly over-designed luminosity. This was the only

Focus on user-friendliness: The area-oriented software can be called up and parameterized using any type of Internet browser – additional programming is now superfluous.

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NEW LIGHTING STANDARD REPLACES OLD STANDARD LIGHTINGWAGO’s newly developed lighting concept reduces lighting power consumption in BMW production facilities by more than a quarter

means for ensuring that the lighting intensity, required by the perti-nent standards, would still be achieved at the predefined time for maintenance. This concept inevitably resulted in inefficient lighting, as energy consumption was unnecessarily high.

■ User-Friendly and Area-Oriented ConceptThe next logical step, after upgrading the central I&C system, was to modernize the hardware at the automation level. In fact, this required a solution that could be used both in newly constructed production facilities, which are equipped in the field with DALI and EnOcean, as well as in retrofit projects, in which BMW planned to retain the existing, conventional technology. The fact that the two technologies, i.e., old and new, could be easily combined was one reason that Jörg Tratzl, the electrical systems planner responsible, ultimately de-cided on components from WAGO. Another reason was the particu-larly user-friendly handling for controlling I&C operating devices that WAGO developed for BMW.The new lighting distribution system is not only up-to-date from a tech-nical standpoint, it also puts special focus on the needs of the end customer: In contrast to the lighting distribution systems used previ-ously, the electrical installation specialist does not have to perform any complicated programming during commissioning or during his everyday work. Instead, the area-oriented software can be adapted to individual needs using only the parameter settings – and this via the graphic user interface provided by any Internet browser. This saves time on the one hand and also eliminates the need for addi-tional expertise, which results in significant reductions in both energy costs and the expenses associated with engineering. The basis for this are the WAGO-I/O-SYSTEM 750 ETHERNET Controllers, which are installed in the local control cabinets in the production facilities with I/O modules for DALI, EnOcean, as well as standard analog/digital inputs and outputs. From there, they control each and every electronic ballast.This allows the lighting to be automatically dimmed according to the lighting schedule. This achieved the first noticeable savings in energy costs, which were generated while simultaneously complying with stringent operating standards. A further advantage is also achieved using DALI: Instead of having to activate entire circuits, so-called short addresses are used to control each individual light. The individuality achieved thereby allows the short addresses to be assembled into groups. Thus, virtual rooms can be depicted on the display using WAGO’s Web visualization, which – just like physical rooms – can be autonomously regulated. For the BMW production facilities, this means that lighting can be optimally adapted for construction work or building re-assignment with only a few clicks of the mouse.

■ Automated and Integrated WorkflowsThe lighting distribution boards standardized by BMW have proven themselves in more than 100 installations at a wide range of loca-tions within the corporate group. Simple configuration of the WAGO control system via an Internet browser has reduced the commission-ing time for each lighting distribution board from several days to only a few seconds. Relays can be installed or removed with just a few turns of the hand using pluggable sockets. “This, of course, also re-duces costs during ongoing operations, as the maintenance work can be performed much more quickly,” explains Jörg Tratzl.Replacement of the hardware is, however, the only activity that still needs to be performed manually at BMW, stresses the electrical systems planner: “Since the WAGO ETHERNET Controllers commu-nicate directly with the plant management software, we have been able to practically perfect this workflow: The exact position of defec-tive lighting is reported, operating hours counters are reset after re-placement of the components, and the brightness levels are adjusted automatically.”

Text: Jürgen Pfeifer, WAGOPhoto: WAGO

Locally automated: The ETHERNET Controller for the WAGO-I/O-SYSTEM 750 and all necessary I/O modules are accommodated in the local control cabinets in the production facilities.

Lighting energy reduction by more than 30%

Commissioning and adjustment without any programming

Parameterization via Internet browser saves time and requires no additional expertise.

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■ Low energy consumption was one of the main goals that Gün-ther Heumann pursued when he was planning his new corporate headquarters. At the same time, he wanted to demonstrate mod-ern building automation to his customers. A WAGO ETHERNET Controller and an app for the iPad form the basis of the building automation.

The new corporate headquarters for Elektro-Service Heumann GmbH offers Managing Director Günther Heumann and his ten employees 400 m² of office and storage space. During planning, special focus was placed on guaranteeing an optimal climate in the space while maintaining low energy costs. Thus, for example, the south-facing facade is nearly all glass, so that the sun warms up the rooms during the colder seasons. Blinds ensure that the temperature does not climb too high in the summer.A wood-fired furnace with an output of 14.5 kW provides the building with warm-air heat if the solar radiation alone is not suf-ficient. In cold weather, a cross-stream heat exchanger uses the

COMFORT AND ENERGY EFFICIENCYBuilding Automation on the iPad

exhaust air to warm the supply air so that very little energy is required for heating. It is also possible to cool the rooms using the supply air. To accomplish this, flat collectors were located under the parking garage, which use a brine pipeline and a heat ex-changer to cool the supply air.

■ Central Control of the Air ConditioningGünther Heumann uses the WAGO-I/O-SYSTEM with the 750-881 ETHERNET Controller to automate climate control. The ETHERNET Controller adjusts the supply and exhaust air flaps in the individual rooms, the cross-stream heat exchanger, the ventilator motors, the heating, the pump for cooling, and the SMI drives for the blinds. Tem-perature sensors in the rooms provide the current actual value; the controller compares this to the value set by the user in order to adjust the flaps of the ventilation accordingly. The WAGO-I/O-SYSTEM thus controls and regulates the entire climate control. Günther Heu-mann and his team created the CODESYS programming themselves in accordance with IEC 61131-3.

At the corporate headquarters for Elektro-Service Heumann GmbH, the company demonstrates how versatile building automation can be.

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■ Light, Sound, and Video MonitoringThe building automation at Elektro-Service Heumann is also sup-posed to fulfill another important requirement: The company would like to demonstrate to its customers what is possible using this type of solution. To achieve this, all systems were supposed to be incor-porated into the central automation if possible. Thus, in addition to HVAC for individual rooms, the WAGO controller regulates the lighting via a DMX bus, and also controls video monitoring and a Bose multi-room sound system. Touch-panel controls in the individual rooms transmit user inputs to the automation technology using En-Ocean wireless technology. Special sensors in the window handles also communicate via EnOcean; signaling the controller whether the window is open, tipped, or closed.

■ Operation via iPadHowever, the highlight of the entire automation system is the user interface on the Apple iPad. The user can program all automation set-tings centrally and call up all functions individually. At the same time,

Lighting energy reduction

Parameterizing and visualization of the building automation using an iPad

Control of HVAC, lighting, video monitoring, and the Bose multi-room sound system

the “AmbientRC” app, created by Günther Heumann, provides an overview of the current status of the building automation – the cur-rent electrical power consumption for the entire building is depicted, among other things. To display the building automation information on the iPad, the controller generates the appropriate xml files and stores them on the internal Web server. The app then visually dis-plays the information on the iPad.Company owner Heumann is completely satisfied, “From the light-ing control through the blinds to the incorporation of sound systems, the WAGO ETHERNET Controller offers a lot of possibilities that we have exploited here in our own building.”

Text: Detlef Holfelder, WAGOPhoto: Elektro-Service Heumann, WAGO

All building automation functions can be programmed and operated easily using an iPad.

The WAGO-I/O-SYSTEM with ETHERNET controller and numerous interfaces commu-nicates with all building automation compo-nents.

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■ Energy efficiency and sustainability ensure signifi-cantly lower operating costs, even in building tech-nology. However, the initially higher capital costs spook many owners away from intelligent building technology. The “1-wire” project at the Berlin MIC-Clinic clearly demonstrates that costs are already dropping, even for investments in innovative tech-nology.

The clinic for Minimally Invasive Surgery (MIC) in Berlin Zehlendorf wanted to renovate and modernize 48 rooms distributed over two floors of the of their current, older building. Every room was to be made energy efficient and provided with HVAC that was both individually adjustable and could be simultane-ously centrally controlled and monitored. So-called 1-wire technology was employed, which transports the electrical supply as well as transmission and re-ception data over one wire. If needed, an additional electrical supply for specific sensors can be incorpo-rated using a ground wire. It is possible to connect multiple sensors via one wire.“With the help of a programmable ETHERNET con-troller, we were able to centralize the climate con-trols into one easy to operate control that includes all pumps, chillers, and valves, as well as the automation and monitoring of heating, cooling, and shading. We already saved around 70 percent of the usual capital costs during construction by using both 1-wire tech-nology and WAGO’s automation solution,” confirms Marco Puchalski, CEO of the leading project partner, TPN Service GmbH & Co. KG.

■ Capital and Operating Costs are ReducedSingle-wire technology involves a very simple bus system using only a single microcontroller pin and simple configuration. Since 1-wire sensors are al-ready being used on a large scale and at low cost per unit (e.g., in mobile data acquisition units), the

1-WIRE TECHNOLOGY EFFICIENTLY INTEGRATED The WAGO-I/O-SYSTEM 750 in conjunction with 1-wire technology saved the MIC Clinic in Berlin around 70 percent of the otherwise standard capital costs

costs for the clinic project could be significantly re-duced by around 70 percent. Using a correspond-ing interface for the WAGO controller, all necessary measured values can be acquired, while integrating any switch program, independent of manufacturer. Up to 60 sensors can be connected and processed using a single 1-wire module. A standard telephone cable with a protective extra-low voltage of 5 V suffices for connecting to the 1-wire sensors, which again avoids expensive cabling and installation costs.Error signaling integrated into the sensors indicates faults in the cable connection or in the hardware, among others. A display visualized on a Web server is used for operation instead a classic, building con-trol system. Thus, any PC or mobile device with a browser is sufficient to control the system, even re-motely. An additional aspect in reducing the capital costs was the flexible use of the WAGO controller. Inex-pensive standard pumps could be combined with a reasonably priced rotational speed control and reg-ulated using the 750-881 ETHERNET Controller. 50 percent of the acquisition costs were saved up front by not purchasing high efficiency pumps.There were special challenges presented by the cooling ceiling: According to the manufacturer’s guidelines, the dew point must be constantly moni-tored in order to carry out a safety shutdown, if nec-essary. Instead of installing relatively expensive and difficult to maintain dew point sensors, the WAGO controller calculates the dew point using sensor data about air temperature, humidity, and air pressure. To prevent condensation from forming, each individual room can be shaded or the flow temperature can be increased. Depending on the season (heating or cooling operations) the controller autonomously adds an offset value to the system in order to com-pensate for changes in temperature perception.

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1-WIRE TECHNOLOGY EFFICIENTLY INTEGRATED The WAGO-I/O-SYSTEM 750 in conjunction with 1-wire technology saved the MIC Clinic in Berlin around 70 percent of the otherwise standard capital costs

“We have a reliable cooling system that is guaranteed to be germ-free, and which is both energy efficient and easy to operate,” reports Dr. Omid Abri, Medical Director at the MIC Clinic.

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■ Controlling the Systems via Web BrowserOther performance requirements included the regulation of the ra-diators already existing in the building, the integration of wind and rain monitoring, and overriding the current fire alarm system so that all shading systems automatically rise during an emergency, or the pumps for the cooling ceiling automatically switch off when the pres-sure drops.A special challenge in integration was presented by the various shad-ing systems present, such as Venetian blinds, fabric awnings, and inte-rior curtains with the electric motors, as well as the wireless connection of the skylights with the shades. Since each blind has a different, spe-cific sensitivity to wind, and the awnings have to be retracted during rain, individual programing was essential. This had to be as flexible as possible, for example, to automatically close the curtains at dusk.All requirements could be implemented using the WAGO controller. CODESYS (Controller Development System) was used as the develop-ment environment for the programmable controller. This program has established itself as the standard in the field of automation technology, is relatively easy to use, and is supported by WAGO’s ready to use program modules and application examples. CODESYS visualization is rendered “Web compatible” by using the integrated Web server for the ETHERNET controller.

■ Investments Pay Off“The project at the MIC Clinic is a good example of how investing in intelligent building technology can quickly pay for itself. Both 1-wire technology and WAGO’s automation solution are very powerful and have a decisively good cost-benefit ratio,” states Marco Puchal-ski about the project results. He also highlights the flexibility and the scope of services. According to his experience, even complex date-time controls can be set using a simple Web operation. “We are very satisfied with the technical equipment for air-conditioning the patients’ rooms. We have a reliable cooling system that is guaranteed to be germ-free, and which is both energy efficient and easy to operate,” confirms Dr. Omid Abri, Medical Director at the MIC Clinic.

Text: Stephan Lampe, WAGOPhoto: MIC Clinic, WAGO

The 1-wire technology in conjunction with the WAGO-I/O-SYSTEM is a solution from TPN Service GmbH & Co. KG.

“We already saved around 70 percent of the usual capital costs during installation by using 1-wire technology and WAGO’s au-tomation solution,” confirms Marco Puchalski from TPN Service GmbH & CO. KG.

A significant energy savings potential can be realized using a de-mand-actuated climate control shading for each individual room.

A display visualized on a Web server is used for operation instead a classic, building control system.

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• BACnet Building Controller (B-BC) Device Profile• Freely Programmable to IEC 61131-3• Integrated Web Server• Highly Modular I/O• Supports SD Card• 2-Port ETHERNET Switch

COMPLEX APPLICATIONS – FAST CONTROL SOLUTIONBACnet/IP - The Building Automation Controller

New solutions for complex or large applications via high-performance CPU

Easy controller data back-up via SD card for BACnet/restore functionality

External trend data storage and Web visualiza-tion on SD card

750-831

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COMPETING IN A DECATHLON AGAINST THE SUNThe WAGO-I/O-SYSTEM 750 assumes center stage in RWTH Aachen’s “Counter Entropy House”

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COMPETING IN A DECATHLON AGAINST THE SUNThe WAGO-I/O-SYSTEM 750 assumes center stage in RWTH Aachen’s “Counter Entropy House”

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■ The ingredients: WAGO’s modular control technology, a hearty serving of good ideas, a large dollop of creativity, some technical skills, fresh university knowledge, and a lot of endurance. The results: One of the highest awards at the “Solar Decathlon Europe 2012” goes to the “Counter Entropy House” built by the team from the RWTH Aachen. This “decathlon of endurance” took place in Ma-drid for the second time, with 20 groups competing this year. Visi-tors experienced life in the future under the Spanish sun.

“There was nothing here. The house was created in an empty fa-cility at the Jülich Research Centre,” Julian Kremeyer narrates the project’s history while observing the construction process on the frame house, designed for occupancy by two people, with a cer-tain tension. If anything is missing, it has to be ordered. There is no small parts storage here for screws, connectors, or tools in order to facilitate the work. Pioneers have always had to do more with less. Julian Kremeyer studied engineering at the RWTH Aachen, not far from the Jülich Centre, and is the team member responsible for ensuring that the building automation truly does deliver what was promised during planning. The “Counter Entropy House” is visually dominated by the over-hanging, rectangular roof. With almost 150 square meters of sur-face, it optimally uses the maximum buildable area, as determined by the competition rules, and serves as a solar energy collector in addition to its usual role as protection from sun and rain. The ac-tual living spaces evolve from the space defined by the roof, and extend for a total dwelling area of 72 square meters.

■ Total Regenerative PackageThe use of completely new methods for heat dissipation, dehu-midification supported by sorption, as well as classic water stor-age improved by phase change materials, form the foundation for the actual energy concept. In order to configure the solar energy inputs to be as efficient and sustainable as possible, solar thermal modules were used in addition to thin-layer photovoltaic cells. A regenerative heat recovery system and intelligent controlling de-vices help to keep the heat losses in the house to a minimum and to round out the energy efficient design.For WAGO, all of these appeared as good reasons for supporting the project with technology and applications support, in collabo-ration with on-site system partners. What they created in an old brick building at the Jülich Research Center will become, after its completion, a positive energy build-ing, with a sustainable, energy-optimized life cycle at its core. Spe-cifically, this means that the production of the components, their transport to the site, and their eventual disposal, were all consid-ered individually, and as a whole.

The WAGO-I/O-SYSTEM 750 forms the communi-cation and control center for the building.

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■ Control Taps Savings PotentialsAgainst this background, the complete building automation is de-signed such that it taps the energy savings potentials to the great-est extent possible and thereby simultaneously offers the maximum living and operating comfort. A central role was assigned to the WAGO-I/O-SYSTEM 750. First, all of the conventional signals – from the ventilation system through the air conditioning up to heating and hot water – were collected using standard I/O mod-ules. Then, the PLC was directly connected to the KNX network. Finally, the whole was designed so that the entirety of the tech-nology could be comfortably controlled using an iPad. For the WAGO-I/O-SYSTEM 750, it made sense to bring all of the func-tions and technical systems into one communication track, in this case, ETHERNET. One of the engineering students explains, “In our house, building automation morphs into the home office and flows into entertainment, including sound control.”

■ iPad OperationDuring their project, the students determined that customers spe-cifically search for modern solutions; for instance, they keep watch for iPad apps for building automation. By this means, light, sound, blinds, temperature, ventilation, and heating can be controlled in a way that is simple, cost-efficient, requires no additional wiring, and is visually much more stylish. The alternatives would have involved separate room operating devices, switches or buttons, which would have then required holes or slits in the walls for their installation.The WAGO-I/O-SYSTEM 750 also offers a web-supported visual-ization interface for more ease of use. “We’re only using this for the house commissioning,” according to Kremeyer, “the residents will use applications specially adapted as apps.” Aside from a purely operational function, the WAGO solution is assigned the task of col-lecting data from the sensors in order to eventually centrally evalu-ate it. In the end, the “Counter Entropy House’s” level of energy efficiency can only be proven using numbers and graphs.

Text: Thomas Schaaf, WAGO Photo: Tobias Schell, Kai Kasugai, WAGO

Maximum degree of freedom for communica-tion interfaces

WAGO-I/O-SYSTEM scores with its integrated Web-based display

Programming that is configured so flexibly that continuous adaptation is possible.

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ENERGY STORED ON ICE■ There are a lot of concepts for energy-efficient industrial and commercial buildings. However, the combination of modern auto-mation, energy, and building technology found in the company headquarters for leitec® Gebäudetechnik GmbH is something quite different. It is not only aesthetic, but with its 400 m³ ice bank, it is also especially efficient.

The building, located in between Göttingen and Erfurt in Hei-ligenstadt, is visually attractive and simultaneously a model for the use of energy and resource saving technologies. Three primary elements are interconnected: an extraordinary energy design (including ice bank, photovoltaics, and heat pump), an efficient heating and ventilation design, and exemplary controls using an innovative, building automation that crosses disciplines. “Our building was constructed in 2011 as a center for modern energy and building technology and has served as a reference project ever since. Whenever we show this building to custom-ers, we can usually count on interesting projects as a result,” reports Bernd Apitz, CEO of leitec® Gebäudetechnik GmbH.

■ Innovative Engineering TechnologyThe building is completely supplied with heat and electricity without the use of any fossil fuels. On the 1200 square meter roof, more than 900 photovoltaic modules annually generate around 100,000 kWh of electricity – enough for use in the building, as well as generating an excess to feed into the grid.The large roof surface also serves as a collection point for the thermal energy needed in the building. A thermal absorption col-lection system was installed between the photovoltaic elements to capture thermal energy. This energy is then fed to a 400 m³ ice bank. The capacity of this robust and relatively inexpensive storage is sufficient for a period of 60 days without solar energy.The functionality of the ice bank is based on the fact that as much energy is used to phase transition water from a cold liquid to solid ice at zero degrees Celsius as is needed to cool hot wa-ter from 80 degrees Celsius to zero. The thermal energy stored is sufficient to heat the entire building in winter and to cool it in the summer.

■ Efficient Heating and Ventilation DesignThe building is equipped with underfloor heating. For the of-fices, however, leitec® had something different in mind. “By us-ing individual room control for lighting, heat, and ventilation, we can save a lot of energy while still increasing the comfort of our employees,” explains Bernd Apitz. To accomplish this,

we installed a new type of low-temperature radiators in the of-fices, which output two to three times as much heat and are approximately five times as effective as conventional radiators of the same style. Controlled by CO2 and presence detectors, the rooms are heated very quickly when an employee enters the office to their individually adjusted comfort level. In addition, a ventilation system supports the effective regulation of room air conditioning and ensures the offices remain cool in the summer. Bernd Apitz calculates the energy savings associated with heat-ing to be 40 to 50 percent.

■ Building Automation Across DisciplinesThe lighting, heating, ventilation, electrical, and security systems are comprehensively controlled using the WAGO-I/O-SYSTEM 750. The WAGO-I/O-SYSTEM serves as the global connection piece between the various disciplines and their bus protocols, such as BACnet, LON®, and KNX, and can thus simultaneously ensure heating and ventilation, an on demand illumination con-trol, blind regulation that is sensitive to weather, and the connec-tion of the safety system with the heating functions.Numerous automated functions in the building regulation ensure high energy efficiency for the entire leitec® building. An impor-tant element is the automated room control. If, for example, an employee opens a window, then the radiator is automatically shut off and the ventilation is regulated using a motorized ven-tilation damper. Corridor lighting is controlled using movement sensors. No consideration of the final fieldbus was required for the field-side wiring of the I/O modules. Due to the modularity of the WAGO-I/O-SYSTEM 750, any combination of digital/analog inputs and outputs is possible. ETHERNET serves as the automation medium. The KNX/EIB world is connected to the ETHERNET using the KNX IP controller. Thus, conventional sen-sors and actuators as well as complex connections to DALI (Digi-tal Addressable Lighting Interface), for the control of the lighting, or to SMI (Standard Motor Interface), for control of the blinds, can be inexpensively integrated.Using DALI modules, individual lights and entire lighting groups can be centrally controlled, and configuration data can be regu-lated and stored. In addition, sensors for brightness measure-ment and presence detection, for example, can be integrated into a DALI network. All electrical data from the supply network, from the actual consumers to the values of the heat pumps, is continuously detected using 3-phase power measurement mod-ules for on-going energy monitoring and management.

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ENERGY STORED ON ICE

The leitec® building is visually attractive and is a model for the use of energy and resource saving technologies. Electricity is generated using photovoltaic modules and thermal energy, which is generated by a ther-mal absorption collection system on the roof, and then fed to an ice bank.

No consideration of the final fieldbus was required for the field-side wiring of the I/O modules. Due to the modularity of the WAGO-I/O-SYSTEM 750, any combination of digital/analog inputs and outputs is possible.

“By using individual room control for lighting, heat, and ventilation, we can save a lot of energy while still in-creasing the comfort of our employees,” explains Bernd Apitz, CEO of leitec® Gebäudetechnik GmbH.

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■ Flexibility for Individual SolutionsThis type of building automation is distinguished by high flexibility and for unusual and innovative solutions, according to the point of view of the CEO of leitec®. Of particular relevance is the open programmability according to the IEC 61131-3/CODESYS Au-tomation Alliance. Bernd Apitz has had good experiences with WAGO’s open I/O system. The independence from specific field-bus types and the large number of available interfaces has vastly simplified the integration of the various disciplines. The modularity of the technology was very convincing for him. Since the electron-ics are incorporated into the module, it is easier to exchange a module than to switch out an entire actuator. Finally, the avail-ability of several modules from industrial automation technology and also the cost-benefit ratio were very attractive. The CEO of leitec® also mentions the constant availability of his WAGO con-tact person.leitec® plans to use its positive experiences with automation, en-ergy, and building technology for additional expansions of the design in the future, for example by integrating eMobility or wind energy. Bernd Apitz considers his company to be well positioned for supplying the growing demand for intelligent controls in pri-vate residences.

Text: Karl-Heinz Sanders, WAGOPhoto: fotografie-grimm-leinefelde,

leitec, WAGO

The heating and ventilation design saves 40 to 50 percent of the heating energy

The cross-discipline building automation includes heating, ventilation, lighting, and shading Flexible due to fieldbus independence and large variety of interfaces

In the leitec® building, one communication network connects the entire building. The WAGO-I/O-SYSTEM serves as the global connection piece between the different disciplines and their bus protocols, like BAC-net, LON®, and KNX.

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Linect® − The COMPLETE PORTFOLIOThe new WAGO components for the universal lighting connection system means Linect® leaves no desires unfulfilled.

294 Series 5-pole Linect® Lighting Connector for three-phase current.

■ The newest components from WAGO’s Linect® portfolio: 294 Series Linect® Lighting Connector, WINSTA® Linect® T-Connector for three-phase current applications, and Linect® Connector for pluggable light-ing connection in conventional installations.

■ Linect® Connectors for Three-Phase CurrentWAGO’s new Linect® Connectors for three-phase current applications now provide easy plug-in connection of lighting systems with three-level circuit topology. This simplifies and expedites lighting installations in shopping centers, sporting facilities and more. The new Linect® con-nector from the WINSTA® MIDI family provides a pluggable lighting connection. It accepts conductor cross sections up to 4 mm² (AWG 12) and a maximum nominal current of 25 A. Therefore, this new con-nector is ideally suited for long cable runs that are commonly used in large-scale projects.WAGO has developed the matching counterpart for the lighting in-dustry: The new 5-pole Linect® Lighting Connector. It is designed for standard connection of solid, stranded and fine-stranded conductors with cross sections ranging from 0.5 mm² to 2.5 mm² (AWG 20–14). The maximum nominal current is 24 A. The 294 Series Linect® Lighting Connector is available with a variety of ground contacts. A snap-on type strain relief plate is also available.

■ Pluggable Lighting Connection in Standard InstallationsThe Linect® Pluggable Connector is part of a standard pre-installation. Linect® luminaries are simply plugged into the finished installation so that opening the light fixture is no longer required. This makes chang-ing the lighting fixture a “snap” for maintenance work or later appli-cation changes. No interruption of the electrical circuit is necessary. The 3-pole Linect® Connector is protected against mismating and is equipped with CAGE CLAMP®S connection technology. Any type of wire (solid, stranded and fine-stranded) with cross sections up to 2.5 mm² (AWG 14) can be accommodated. The maximum nominal current is 24 A.In addition to designers, electricians, and wholesalers, light manufac-turers will also benefit from the new Linect® Connector. In Scandina-vian countries, for example, Linect® lights can be quickly installed us-ing a SCHUKO connection kit.

Text: Stephan Albrecht, WAGOPhoto: WAGO

Also designed for three-phase cur-rent: The 5-pole Linect® T-Connec-tor, available with A Coding and white housing.

Linect® Pluggable Connector (770-6229): Standard installation with pluggable lighting connection.

2020

■ In order to realize an energy-efficient building, mature building automation is necessary. In the fields of heating, ventilation, and air conditioning, which are especially important with regard to energy consumption, WAGO has made libraries available to their custom-ers that include ready-made system macros. Expensive programming time can often be skipped when libraries are used. The use of system macros like these can contribute to standardization and thus to cost reductions.

Around 40 percent of the energy used in Germany is consumed by buildings. Due to increasing energy costs, energy efficiency in buildings plays an increasingly important role. The DIN EN Stan-dard 15232 defines four energy efficiency classes (A to D), which represent a method for measuring a building’s energy efficiency. In addition to the design of the main body of the building and the technical systems used, automation technology and the corre-sponding software exert an enormous influence on energy effi-ciency.The fields of heating, ventilation, and air conditioning (HVAC) are of particular interest in relation to energy consumption, as they consume a relatively large proportion of the building’s energy needs. Buildings with a high energy efficiency can be certified according to various standards. Among the most important are the Australian “Green Star,” the German DGNB, the French HQE, BREEAM in Great Britain, as well as LEED and “Green Globes” in the USA.

WAGO provides extensive HVAC libraries free of charge

Pre-made system macros replace expensive programming through the use of simple parameterization

Initialization takes place using a Web-based user interface

LIBRARIES FOR HVAC APPLICATIONSParameterizing instead of programming: ready-made system macros ensure standardization and contribute to cost reductions

21direct building

■ Planning Lays the FoundationPlanning for the technical equipping of a building forms an im-portant foundation for energy-efficient building operation. One basic requirement is that everyone who participates in the con-struction shares a common and clear language. Foundations for this can be found in the Construction Tendering and Contract Regulations (VOB), the Association of German Engineers (VDI) 3814, and DIN EN ISO 16484-3. However, nothing is said as yet in the guidelines and standards about the components that are to be used. This applies for equipment as well as for hard-ware and software for automation. In technical building services, there exist a multiplicity of proto-cols and interfaces, via which the individual components can be addressed. In addition to simple analog and digital inputs and outputs, BACnet, MODBUS, LON®, MP-bus, KNX, EnOcean, and DALI are all well represented in the market, as well as nu-merous others. In larger commercial properties, a mixture made of different protocols and bus systems is often used simultane-ously. Therefore, there is a need for automation hardware that can operate all protocols and interfaces in one system, as far as possible. The WAGO-I/O-SYSTEM 750 is the hardware solution to meet this challenge. The controller, which takes on control tasks for the automation solution, can be easily expanded using various system modules, so that almost any devices can be con-nected to the system.

■ From Planning to ImplementationThe controllers, which use CODESYS Soft PLC, are programmed ac-cording to the IEC Standard 61131-3. WAGO has made a compre-hensive HVAC library available to their customers in the fields of heat-ing, ventilation, and air conditioning, so that their customers do not have to do the programming themselves. For many common applica-tions, there are suitable system macros, which the user only has to configure. After the user has entered data points and system parame-ters, the ready-made application can be directly commissioned. Com-plex programming is thereby avoided, which can lead to significant cost reductions for starting up systems and the re-use of macros simpli-fies standardized solutions.Customers can obtain the HVAC system macros free of charge from the company’s homepage. Even complex applications, such as cas-cade control using cross-flow heat exchangers and frequency regu-lated fans, are available in the library. Additional function blocks, which allow easy expansion of the available macros, are likewise in-cluded in the library. Initializing the application takes place using a Web-based user inter-face. The user can set parameters using the interface and carry out any additional configurations of the application. A visualization dis-play is also possible without requiring a large programming expendi-ture. A Web-server is integrated into the controllers, which graphically depicts the building services, showing the current parameters of the different systems and enabling operation. The only thing that the user has to supply is a standard Web browser. Ideally, WAGO’s operating panels from the PERSPECTO® Series can also be used here.

■ Bottom Line: System Implementation without ProgrammingEnergy-efficient building automation succeeds only with modern automa-tion systems, which integrate all disciplines within a commercial property, to the greatest extent possible. The HVAC fields play a central role in rela-tion to total energy consumption. Using WAGO’s components and sys-tems for building automation and the appropriate, ready-made applica-tions, which are available at no charge in the HVAC library, the user can implement an energy-efficient building automation system without exces-sive programming costs. The visual display of the completed building automation is also automatically generated to a substantial extent using the integrated Web server.

Text: Karl-Heinz Sanders, WAGOPhoto: © PantherMedia/Fabian Schmidt, WAGO

LIBRARIES FOR HVAC APPLICATIONSParameterizing instead of programming: ready-made system macros ensure standardization and contribute to cost reductions

22

COMPACT SPLICING CONNECTORS FOR ELECTRICAL INSTALLATIONSCertified “Maintenance-Free”

■ Compact splicing connectors are commonly used in electrical in-stallations for connecting wires with one another. Compact splicing connectors that employ Spring Pressure Connection Technology, i.e., connectors which do not require the use of any tools, can be installed extremely quickly. Connections implemented in this manner are per-nament and stable. WAGO’s 222 Series Compact Splicing Connec-tors are the first in the world to be certified according to the British Standard BS 5733 mf as maintenance-free.

The 222 Series is the first choice among many installers when it comes to implementing reliable electrical connections easily and quickly. One of the major advantages of the 222 Series is that fine-stranded wires can also be connected without first having to pre-pare the wire ends, meaning that soldering or crimping on of fer-rules is not required. This saves quite a bit a time in practical use.

■ High Degree of Reliability during Installation and OperationThese compact connectors are well-suited for wire sizes up to 4 mm2 (AWG 12) and are designed for nominal currents up to 32 A. This enables these connectors to be used for wiring of low-voltage light-ing, which normally carries a relatively high current. The 222 Series also offers 100% touch-proof protection, both during assembly and operation. As the wire insulation extends fairly deep into the con-nector, a minimum distance of 4 mm is always maintained between the exposed surface and live parts, reliably ruling out any risk to users.The quality of electrical contact is also of vital importance for a compact connector. Depending on the amperage, poor contact, i.e., high resistance, can result in smoldering of the housing in a worst case scenario. The funneled wire entry hole of the 222 Series ensures that, even for fine-stranded wires, all single strands are in-serted into the clamping unit, for a secure connection. Once the spring clamp has ensured proper contact, it is of course essential that this contact remain permanent. A number of factors, such as temperature fluctuations, relative humidity or aggressive industrial atmospheres, can have an impact on the contact. WAGO placed particular focus on these influences in the development of the 222 Series. This is why these connectors are constructed of high-quality and high-grade materials.

■ Maintenance-Free - Defined for the First Time in a StandardCompact splicing connectors such as those of the 222 Series are subject to numerous standards requirements, such as the UL 486C and IEC 60998 series of standards. Requirements for maintenance-free electrical connections are defined in Great Britain in the BS 5733 standard. This specification of maintenance-free components is unique throughout the world. Since WAGO attached great impor-tance to long-term connection stability in the development of the 222 Series, it was decided to conduct certification of the connectors according to the BS 5733 standard. Besides long-term electrical connection stability, this standard also describes other influences which electrical connections must withstand, such as vibrations, ther-mal loading and short-term overloading.

23direct building

COMPACT SPLICING CONNECTORS FOR ELECTRICAL INSTALLATIONSCertified “Maintenance-Free”

■ Certified as “Maintenance-Free” by Dekra to BS 5733WAGO contracted the Dutch testing institute Dekra in Arnheim for the certification of the 222 Series, where tests as prescribed in the BS 5733 standard were conducted. This included testing of long-term stability, vibration resistance and behavior under overcurrent and thermal loading conditions. The 222 Series passed all of the tests with flying colors. Dekra has thus confirmed that the 222 Se-ries meets the requirements set forth in the BS 5733 standard and that it is maintenance-free for the applications defined by the stan-dard.Certification of the 222 Series provides decisive benefits for instal-lation. For example, the compact splicing connectors can now be used in locations that are not accessible for maintenance work on conclusion of installation, i.e., non-accessible locations. A typical example of this are the electrical installation locations in buildings that are subsequently plastered over or covered by wall paneling.

The British BS 5733 standard only allows components that have “maintenance-free” certification to be used in such locations.

Up to now, only soldered or crimped connections were per-mitted for use at these locations and these required a consid-erably greater amount of time for installation. Now, after certification of the 222 Series Compact Splicing Connec-

Suitable for all wire types

High degree of reliability during installa-tion and operation

Certified “maintenance-free” based on BS 5733

tors, users can use these to easily and quickly install connectors for these types of installations.Even though this standard is valid only for the British market, this certification demonstrates that the quality and level of reliability of WAGO’s 222 Series Compact Splicing Connectors are exceed-ingly high — something that users throughout the world can benefit from.

Text: Andreas Brettschneider, WAGOPhoto: WAGO

ADDRESSES DWAGO Kontakttechnik GmbH & Co. KGPostfach 28 80, 32385 MindenHansastraße 2732423 MindenPhone: +49 571 887-0Fax: +49 571 887-169info@wago.com

AWAGO Kontakttechnik Ges.m.b.H.Laxenburger Straße 2441230 ViennaPhone: +43 1 6150780Fax: +43 1 6150775info.at@wago.com

CHWAGO CONTACT SARte. de l’Industrie 19Case Postale 1681564 DomdidierPhone: +41/26 676 75 86Phone: +41/26 676 75 01info.switzerland@wago.com

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WAGOdirect building March 2013

Editor: Torsten Schimanski (responsible editor)

Phone: +49 (0)571 887-531 Fax: +49 (0)571 887-8531

Re-use of this content free of charge is possible following approval and with use of appropriate citation. Contact: Torsten Schimanski. We assume no liability for unsolicited manuscripts and photos sent in. WAGOdirect building appears at irregular intervals.

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