Carel easy way aria, User Manual, Page: 8 / 44

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easy way ARIA +030220841 - rel. 1.0 - 26.10.2007
The advantages of working at 2.4 GHz
band of
frequencies no of
chan. data parameters use
symbol rate rate mapping
868-868.6
MHz 1 20 Kbit/s 20 Kbaud binary europe
902-928 MHz 10 40 Kbit/s 40 Kbaud binary north
america
2.4-2.4835
GHz 16 250 Kbit/s 62.5
Kbaud 16-ary
orthogonal world
wide
Tab. 1.a
The band centred around 2.45 GHz (used in the easy way ARIA system)
is the only one that can be used all over the world, without needing to
apply for special licenses. In addition, the ISM band (Industrial, Scientifi c
and Medical) exploits the full potential of the standard, that is, can use 16
transmission channels with a bit rate of 250 kbit/s.
Types of nodes
ZigBee™ Coordinator (easy way access point) •
Must be available in every network –
Coordinates the creation of the network –
ZigBee™Router (easy way Repeater)
•
Participates in the delivery of the messages –
Node with routing function –
ZigBee™End Device (easy way terminals and sensors)
•
Node with limited functions –
Low cost –
Type of easy way network (MESH)
ZigBee™ Coordinator - Access Point
ZigBee™ Router - Repeater
ZigBee™ End Device - terminali/sensori
Fig. 1.c
Fig. 1.d Fig. 1.e
The MESH layout, used in the easy way ARIA system, between coordinator
nodes (access points) and routers (repeaters) ensures a high tolerance to
faults, as if one router is damaged, the wireless signal still manages to fi nd
the fastest route to reach the destination .
1.6 Application examples
Underfl oor heating
Fig. 1.f
Air handling units (AHU)
Fig. 1.g
Supervision systems
Fig. 1.h