40
GB
easy way ARIA +030220841 - rel. 1.0 - 26.10.2007
Maximum distance between Access Point and terminals/sensors in an •
open eld (outdoors): 100 m;
maximum distance between Access Point and terminals/sensors with •
eld of sight (indoors): 50 m;
transmission frequency: selectable from 2405 to 2480Mhz;•
number of channels available: 16 ;•
transmission power: 0 dBm;•
wireless protocol: ZigBee;•
physical layer: 802.15.4;•
reception sensitivity: -90 dB;•
maximum current: 35 mA;•
current in standby: 1 µA;•
domain levels: 7;•
maximum number of wireless network devices 199, of which:•
15 Access Point; –
184 terminals + sensors; –
maximum 5 repeaters in cascade connection;•
maximum no. of devices connectable to each access point 60, of which:•
24 terminals/sensors connectable directly to the access point; –
8 Repeaters, connectable directly to the access point; –
24 terminals/sensors, connectable directly to each repeater. –
Example:
Fig. 7.a
Key:
Access Point 1st level dominion
Repeater 2nd level dominion
terminals/sensors 3th level dominion
7. WIRELESS FEATURES OF THE EASY WAY SYSTEM