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Legacy DCS
without
HART support
Remote I/O
station w/o HART
support
SITRANS
MDS
OS
IWLAN
IEEE802.11
IE/WSN-PA LINK
SITRANS AW200
Industrial Ethernet
WirelessHART
Industrial Ethernet
PR
OFIBUS
4 –20 mA
4 –20 mA
4 –20 mA
Figure 4-2
WirelessHART network with diagnostics station
The WirelessHART network is capable of organizing itself. This is the responsibility of the
"Network Manager" software that automatically organizes, establishes and manages
WirelessHART networks. The Network Manager software calculates the optimum connection
paths between the network nodes and selects an alternative path via which the data will be sent
if an error or fault occurs.
After installation, every WirelessHART adapter is capable of recognizing its neighbors. The
WirelessHART adapter detects the strength of the wireless signal, synchronizes itself, obtains
frequency information and then establishes connections to its neighbors in the wireless
network. This means that the user is not required to make any settings regarding the
organization of the network.
Power supply of the WirelessHART adapter
The power required by the WirelessHART adapter is provided by the supplied battery unit. The
field device can be supplied by the battery unit or by a separate power supply. It is possible to
connect two-wire and four-wire field devices.
If you use the battery to supply power to the field device, this shortens the life of the battery.
4.2
Siemens HART field devices for the adapter
Up to four HART and 4 … 20 mA field devices can be connected to the WirelessHART adapter
SITRANS AW200. Depending on their electrical characteristics, the field devices can either be
supplied with power by the WirelessHART adapter or you require an external power supply.
Information on Siemens HART field devices for the adapter is available under: Services &
http://www.siemens.com/automation/service&support
Mode of operation and system
4.2 Siemens HART field devices for the adapter
WirelessHART Adapter SITRANS AW200
18
Operating Instructions, 02/2020, A5E02777161-AA