RAD-...-IFS
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PHOENIX CONTACT 105542_en_05
Network structures
2.4 GHz wireless modules can be used to create network structures with up to 250 devices.
Up to 99 devices are possible with 868 MHz wireless modules. In these network structures,
each device has a repeater function for forwarding data.
In addition, the Trusted Wireless network is able to self-heal connection aborts (self-healing
network). Alternative connection paths are initiated automatically. From a simple point-to-
point connection to complex mesh networks, you can flexibly create various structures.
Figure 8-2 Point-to-point connection, star network, self-healing mesh network
Distributed network management
Technologies such as WirelessHART or ZigBee use centralized network management.
That means that all messages pass through a central manager, which can lead to a signifi-
cant volume of wireless network traffic.
Trusted Wireless 2.0 on the other hand uses distributed network management. This in-
volves creating “parent-child zones” in the wireless network where the higher-level wireless
module is referred to as the “parent” and the wireless modules connected to it as “children”.
All network management takes place within the parent-child zone and therefore does not
have to be directed through the central manager. This reduces the message traffic volume
and speeds up data exchange.
Figure 8-3 Distributed network management with parent-child zones
Point to Point Star
self healing Tree, or Mesh
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Parent-Child-Zone 1
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Parent-Child-Zone 2.1 Parent-Child-Zone 2.2
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Parent-Child-Zone 3.1
M = Master
R = Repeater
S = Slave
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