Description
3.7 WirelessHART
SITRANS TF280 WirelessHART
18
Operating Instructions, 10/2010, A5E02619566-02
Properties
Field devices communicating using wireless HART can be connected into a meshed
network:
● The wireless HART gateway obtains information from each field device involved in the
wireless HART network concerning the respective adjacent devices.
● The network manager in the wireless HART gateway organizes the network on the basis
of this information.
The field devices present on the network are both signal sources and repeaters. A message
is passed on from the transmitting field device via the connected fields devices until the
wireless HART gateway is reached. If a network station fails or if a hindrance prevents a
message from being passed on, the data is automatically transmitted via alternative routes.
If an additional field device is integrated into an existing network, it must be authenticated.
①
Wireless HART gateway: SIMATIC NET IE/WSN-PA Link
②
SITRANS P280 WirelessHART pressure transmitter
③
SITRANS TF280 WirelessHART temperature transmitter
Figure 3-4
Meshed wireless HART network (example)
The transmission distance from station to station without barriers (line-of-sight) is up to
250 m. Significantly longer distances can be covered it the field devices of a network are
spatially positioned in sequence.
