List of figures
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Figure 7-18: RAD-DI4-IFS structure ......................................................................103
Figure 7-19: Basic circuit diagram for the RAD-DI4-IFS ........................................ 103
Figure 7-20: Diagnostic LEDs of the RAD-DI4-IFS ................................................104
Figure 7-21: RAD-DI8-IFS structure ......................................................................106
Figure 7-22: Basic circuit diagram for the RAD-DI8-IFS ........................................ 107
Figure 7-23: DIP switches of the RAD-DI8-IFS .....................................................107
Figure 7-24: Diagnostic LEDs of the RAD-DI8-IFS ................................................109
Figure 7-25: RAD-DOR4-IFS structure .................................................................111
Figure 7-26: Basic circuit diagram for the RAD-DOR4-IFS ................................... 112
Figure 7-27: DIP switches of the RAD-DOR4-IFS ................................................. 112
Figure 7-28: Diagnostic LEDs of the RAD-DOR4-IFS ........................................... 113
Figure 7-29: RAD-DO8-IFS structure ....................................................................116
Figure 7-30: Basic circuit diagram for the RAD-DO8-IFS ...................................... 117
Figure 7-31: DIP switches of the RAD-DO8-IFS .................................................... 117
Figure 7-32: Diagnostics LEDs of the RAD-DO8-IFS ............................................ 118
Figure 7-33: RAD-DAIO6-IFS structure ................................................................. 121
Figure 7-34: Basic circuit diagram for the RAD-DAIO6-IFS ................................... 122
Figure 7-35: DIP switches of the RAD-DAIO6-IFS ................................................ 122
Figure 7-36: Diagnostics LEDs of the RAD-DAIO6-IFS ......................................... 123
Figure 8-1: Penetration of obstacles at different frequencies .............................. 129
Figure 8-2: Point-to-point connection, star network, self-healing mesh network . 130
Figure 8-3: Distributed network management with parent-child zones ................ 130
Figure 8-4: RF bands in the 2.4 GHz wireless system ......................................... 131
Figure 8-5: RF bands in the 868 MHz wireless system .......................................131
Figure 8-6: Antenna polarization .........................................................................134
Figure 8-7: Decoupling of wireless paths due to directivity and different polarization
levels ................................................................................................ 135
Figure 8-8: Outdoor installation of antennas .......................................................136
Figure 8-9: Dispersion on a rough surface .......................................................... 141
Figure 8-10: Diffraction on an edge ....................................................................... 141
Figure 8-11: Reflection on a metal surface ............................................................141
Figure 8-12: Reduction of radio waves when penetrating a wall ........................... 142
Figure 8-13: Angle of the transmitter and receiver ................................................ 143
Figure 8-14: Radio dead spot ...............................................................................143
Figure 8-15: Wireless path with strong wind .........................................................144
Figure 8-16: Fresnel zone ..................................................................................... 145
Figure 8-17: Free space attenuation ..................................................................... 148
Figure 8-18: Bush with an attenuation of approximately 15 dB ............................. 149
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