Planning wireless systems
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8.4 RF bands
2.4 GHz
Data rates and RF bands do not depend on the network topology.
Figure 8-4 RF bands in the 2.4 GHz wireless system
868 MHz
The number of RF bands depends on the network topology and the over-the-air (OTA) data
rate.
Figure 8-5 RF bands in the 868 MHz wireless system
Point-to-point connection,
star network
I/O, serial, PLC / Modbus/RTU mode
Mesh network
250 kbps
125 kbps
16 kbps
8RFbands
(frequency hopping spread spectrum method)
1 RF band (fixed frequency)
Point-to-point connection, star
network
I/O, serial, PLC / Modbus/RTU mode
Mesh network
1.2 kbps
9.6 kbps
19.2 kbps
60 kbps
120 kbps
14 RF bands (fixed frequency)
2 RF bands
(frequency hopping spread
spectrum method)
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