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1.1 easy way ARIA
The easy way system is designed for all HVAC/R applications that require
the monitoring of the ambient conditions (temperature and humidity)
and/or the control of the ambient comfort based on the requirements
of the end user (operating mode, set point, ...). These applications
may involve geothermal heat pumps and roof top units in hospitality,
residential and light commercial environments.
1.2 Description
easy way ARIA is made up of:
•
easy set:
an innovative wireless terminal with integrated sensors for
measuring the temperature and humidity.
•
easy read:
wireless sensors that measure the temperature and
humidity.
•
access point:
RS485/ZigBee™ gateway hat collects the information
from the terminals and sensors.
•
repeater:
ZigBee™ to ZigBee™ device that relays the wireless signals,
allowing greater distances between the access point and terminals/
sensors.
1.3 Advantages of the CAREL solution
Easy way ARIA is an advantageous solution in terms of:
•
fl exibility: possibility to manage fl exible spaces very simply, thus
reorganising the layout of a supermarket or an offi ce without having
an impact on the communication network.
•
simple installation for retrofi t applications, in historical or prestigious
properties that do not have raised fl oors or false ceilings.
•
lower installation and operating costs.
•
easy commissioning/service.
•
integration with the most commonly-used Building Management
Systems (BMS).
•
specifi c control of individual zones (energy saving).
•
the now mature ZigBee™ technology used for wireless communication
ensures high security of the data exchanged.
•
mesh layout between the access point and Repeaters.
1.4 Terminology
Wireless
Wireless means "without wires", in contrast to the term "wired.
Wireless network
Telecommunications system (series of devices, appliances, methods and
protocols) for the transmission of information via radio, typically radio-
frequency technology used instead of wired connections, making the
systems particularly fl exible.
ZigBee™
Zigbee™ is a set of specifi cations based on the IEEE-802.15.4 standard for
the creation of Wireless Personal Area Networks (WPAN).
Comparable in some ways to Bluetooth, it stands out for its very low
power consumption and the reduced cost of implementation, despite
having a maximum data transfer speed of 250 kbit/s.
ZigBee™ devices, with compact dimensions and low costs, are designed
to work in dedicated self-organised networks (Mesh networks) and are
used in many fi elds.
1. INTRODUCTION
1.5 Advantages of the wireless solution
Advantages of a wireless network over a wired network
•
mobility of the terminals;
•
ease of installation and connection of the devices;
•
coverage even where obstacles are present;
•
fl exibility in the event of structural modifi cations;
•
reduction in wiring costs;
•
scalability in the interconnection of terminals;
•
sturdiness.
The advantages of wireless networks can overcome some of the intrinsic
limits in wired systems.
Advantages of ZigBee™
•
standard technology;
•
reduced costs ;
•
can be used globally;
•
reliable;
•
supports a large number of nodes;
•
easy confi guration;
•
long battery life;
•
secure data transmission.
ZigBee™
7
Fig. 1.a
Fig. 1.b
easy way ARIA +030220841 - rel. 1.0 - 26.10.2007
GB
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