RF600 system planning
4.5 Regulations applicable to frequency bands
RF600
System Manual, 09/2005 Edition, J31069 D0171-U001-A0-7618,
4-17
Channel assignment
•
The UHF band from 865 to 868 MHz is subdivided into three sub bands:
Sub bands
Frequency range
Output
865.0 to 865.5 MHz
0.1 W ERP
865.6 to 867.6 MHz
2,0 W ERP
:
:
:
0+]
0+]
0+]
0+]
867.6 to 868.0 MHz
0,5 W ERP
Listen before talk
With this technique, the reader checks whether a channel is assigned before transmission to
prevent collisions. The reader will only transmit when a channel is free. The reader can
transmit for up to ?? seconds on this channel and must then pause for at least ?? seconds or
jump immediately to an unassigned channel on which it can transmit for a further ??
seconds.
Regulations for frequency bands according to EN 300 220 (short range device)
For those countries in which the RFID directive according to EN 302 208 has not yet been
implemented, this alternative exists which is based on the older "Short range device"
directive:
EN 300 220 (short range device)
Frequency range
865.6 to 868 MHz
Number of channels
12
Transmit power
Max. 0.5 W ERP
Duty cycle (frequency assignment period)
10 % (6 min./h)
Содержание SIMATIC RF660
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