WSN-9791 NI [National Instruments Corporation], WSN-9791 Datasheet - Page 2

• Manufacturer Part Number: WSN-9791
• Description: Wireless Sensor Network Ethernet Gateway
• Manufacturer: NI [National Instruments Corporation]

NI Wireless Sensor Network Ethernet Gateway
theoretical throughput of 250 kbits/s. In general, this correlates to between
30 and 60 samples per minute per channel on the WSN measurement nodes.
communication channels to optimize performance and ensure coexistence with
other wireless devices. The external, omnidirectional antenna and internal power
amplifier offer up to 300 m outdoor range with line of sight.
Software Overview
With NI-WSN software, you can easily configure your sensor network in the
NI Measurement & Automation Explorer (MAX) configuration utility and quickly
extract measurement data from your wireless sensor network with the LabVIEW
graphical development environment.
Network Configuration
MAX offers an intuitive user interface to add and remove measurement nodes
and configure wireless settings. Upon connection, the WSN-9791 Ethernet
gateway is autodetected under Remote Systems in MAX, and you can assign
measurement nodes to the gateway. The gateway maintains a list of nodes
(by serial number) that have been authorized for network access. When a node
powers up, it scans for available networks, locates either a gateway or router,
and attempts to join it. If the gateway has the node in its list, the node joins the
network, downloads the latest configuration from the gateway, and begins its
normal operation of acquiring measurement data and controlling digital I/O. If a
node is unable to connect, it executes a retry sequence with increasingly higher
wait periods beginning with one minute between connect attempts and ending
with 55 minutes between connect attempts. This preserves battery power if a
gateway is offline.
including their last communication time, battery status, and link quality. In
addition, MAX provides an interface to set the wireless communication channel,
configure the gateway IP address, and wirelessly update firmware on the
measurement nodes.
Figure 2. Network Configuration in MAX
To save power and increase reliability, the network delivers a maximum
You can configure the network to operate on any of the 14 wireless
MAX also offers an overview of the nodes connected to your network
Programming
You can integrate your NI WSN measurement data directly into LabVIEW. After
adding the WSN Ethernet gateway to a LabVIEW project, the nodes configured
with the gateway in MAX are automatically added underneath the gateway in
the project, giving you instant access to their I/O and properties.
Figure 3. NI WSN System in a LabVIEW Project
block diagram for data extraction, analysis, and presentation.
Simply drag and drop I/O variables from the LabVIEW project to a LabVIEW
BUY ONLINE at ni.com or C
ALL 800 813 36
93 (U.S.)
2