NI WSN-9791

Wireless Sensor Network Ethernet Gateway
NI WSN-9791 NEW!
◾◾ NI-WSN software provides easy
network configuration and
data extraction
◾◾ 2.4 GHz, IEEE 802.15.4 radio to
communicate with measurement nodes
◾◾ 10/100 Mbits/s Ethernet port for
flexible connectivity to Windows PCs
or LabVIEW Real-Time programmable
automation controllers (PACs)
◾◾ Up to 300 m outdoor range with line
of sight
◾◾ Supports up to 36 measurement nodes
◾◾ 9 to 30 VDC power input
◾◾ Industrial ratings:
◾◾ -30 to 70 ºC operating temperature
◾◾ 50 g shock, 5 g vibration
◾◾ Panel and DIN-rail mounting
options available
Operating Systems
◾◾ Windows Vista/XP/2000
◾◾ LabVIEW Real-Time
Software Support
◾◾ LabVIEW
Driver and Configuration
Software (included)
◾◾ NI-WSN software
◾◾ Measurement & Automation Explorer
configuration utility
Overview
The NI WSN-9791 Ethernet gateway coordinates communication between
distributed NI WSN-32xx measurement nodes and a host controller in your NI
wireless sensor network (WSN). The gateway uses a 2.4 GHz, IEEE 802.15.4
radio to gather measurement data from the sensor network and a 10/100 Mbits/s
Ethernet port to provide flexible connectivity to a Windows PC or NI LabVIEW
Real-Time PAC, as seen in Figure 1.
With this flexibility, you can create simple, stand-alone wireless monitoring
networks or completely integrated wired and wireless measurement solutions
that feature access to the full breadth of NI hardware and software platforms.
LabVIEW integration with NI WSNs delivers a common development
environment for your applications as well as rapid application development,
easy network configuration, remote data access, and the ability to program and
customize measurement node behavior.
The 9 to 30 VDC externally powered gateway offers -30 to 70 °C operating
temperatures, 50 g shock ratings, and a compact, 2U form factor. Up to
36 measurement nodes can communicate with a single gateway, and you can
configure the Ethernet settings of the gateway for DHCP, static, and link-local
IP address configurations.
Wireless Networking
The NI WSN system is built on a low-power, reliable IEEE 802.15.4 network.
The Ethernet gateway coordinates the wireless network, performing functions
such as device authentication, message buffering, and network topology
administration.
The gateway, routers, and end nodes work together to form a mesh network.
Measurement nodes can operate as routers or end nodes, providing the flexibility
to extend the range of your sensor network. When nodes are configured as
routers, they can repeat messages from end nodes and extend network range
Figure 1. NI WSN systems provide flexible connectivity to Windows or LabVIEW Real-Time
host controllers.
while acquiring measurement data.
NI Wireless Sensor Network Ethernet Gateway
To save power and increase reliability, the network delivers a maximum
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.
You can configure the network to operate on any of the 14 wireless
communication channels to optimize performance and ensure coexistence with
other wireless devices. The external, omnidirectional antenna and internal power
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.
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.
MAX also offers an overview of the nodes connected to your network
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 3. NI WSN System in a LabVIEW Project
Simply drag and drop I/O variables from the LabVIEW project to a LabVIEW
block diagram for data extraction, analysis, and presentation.
Figure 2. Network Configuration in MAX
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Wireless Sensor Network Ethernet Gateway
Mechanical Information
The WSN-9791 Ethernet gateway measures approximately 4.6 by 2.3 by 3.5 in.
(L by W by H). The front of the gateway offers power, status, and activity LEDs
in addition to a reset button that you can use to reboot the device. The power
connector and Ethernet port are located on the front, while the DIN-rail and panel
mount plate screw holes are located on the back of the device. The gateway also
includes integrated panel mount holes that are located on the side of the device.
Consult the WSN-9791 user guide for detailed mechanical information.
Reset
Button
Figure 4. Extracting NI WSN Measurement Data Using LabVIEW
Advanced WSN Architectures
You can combine NI WSNs with other NI platforms to customize and enhance
your measurement capabilities. You can complement your NI WSN with PACs,
Activity,
Power,
Status LEDs
vision systems, or even human machine interfaces (HMIs) to create a fully
Ethernet Port
integrated solution that meets your unique application needs.
Power
Connector
DIN-Rail and
Panel Mount Plate
Screw Holes
Integrated Panel
Mount Holes
Figure 6. Gateway External Features
Accessories
NI WSN accessories feature options for gateway and measurement node
mounting as well as a weatherproof enclosure for outdoor use of the
measurement nodes. Available mounting accessories include options to panel
mount and DIN-rail mount WSN measurement nodes and gateways. The
NI WSN-3281 magnetic panel mount kit provides easy setup and takedown
on virtually any metal surface. For high shock and vibration applications,
NI recommends a panel mounting configuration rather than DIN-rail.
Figure 5. Customize and enhance your NI WSN system.
LabVIEW integration with NI WSNs also provides database integration,
remote data access with Web services, and customizable analysis and
visualization of your data. In addition, you can use other NI software such as
Accessory
Description
NI WSN-3280
NI WSN node panel mount bracket with spring-loaded screw-locking
mechanism and integrated strain relief
NI WSN-3281
NI WSN node magnetic panel mount bracket with spring-loaded
screw-locking mechanism and integrated strain relief
NI WSN-3282
NI WSN DIN-rail mounting kit for nodes or gateway (includes four screws)
NI WSN-3283
NI WSN panel mount plate for nodes or gateway (recommended for
gateway) with additional four keyholes for mounting to wall in multiple
orientations (includes four screws)
Table 1. Mounting Kits
You can choose from several power accessories that provide external power
to the WSN Ethernet gateway or WSN measurement nodes.
DIAdem to provide advanced data processing and analysis or the LabVIEW
Datalogging and Supervisory Control Module for integrated event detection
and alarming.
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NI Wireless Sensor Network Ethernet Gateway
Accessory
Description
Desktop Power Supply
This power supply provides 12 VDC power up to 1.25 A/15 W,
and is rated for 0 to 70 °C. The supply terminates with a 2-position
MINI-COMBICON connector; plugs directly into the WSN gateway
or measurement nodes.
PS-5 Power Supply
This DIN-rail-mountable, 24 VDC power supply delivers up to 5 A of
current and is rated for operation from -25 to 60 °C. Recommended for
industrial installations.
Table 2. External Power Supplies
Ordering Information
NI WSN Starter Kit (Americas).......................................................781080-01
NI WSN Starter Kit (Europe/Asia)..................................................781080-11
Ethernet Gateway
NI WSN-9791 (Americas)...............................................................780996-01
NI WSN-9791 (Europe/Asia)...........................................................780996-11
The connectivity accessories for NI WSN products include additional screw-
Programmable Measurement Nodes
terminal kits for the measurement nodes and a power connector backshell kit
NI WSN-3202 (Americas)...............................................................780997-02
that contains a strain relief attachment for the two-position power connector on
NI WSN-3202 (Europe/Asia)...........................................................780997-12
the Ethernet gateway and measurement nodes.
NI WSN-3212 (Americas)...............................................................780998-02
NI WSN-3212 (Europe/Asia)...........................................................780998-12
Accessory
Description
Power Connectors
Extra 2-position MINI-COMBICON power connectors – quantity 4
Power Connector
Backshell
Strain relief attachment for the 2-position power connector on the
measurement nodes and gateway that clips to the connector and includes
a zip tie to hold the power cable in place
Table 3. Connectivity Accessories
Nonprogrammable Measurement Nodes
NI WSN-3202 (Americas)...............................................................780997-01
NI WSN-3202 (Europe/Asia)...........................................................780997-11
NI WSN-3212 (Americas)...............................................................780998-01
NI WSN-3212 (Europe/Asia)...........................................................780998-11
Power Accessories
Desktop supply................................................................................780703-01
U.S. power cord..............................................................................763000-01
PS-5 industrial supply.....................................................................778805-90
Mounting Accessories
NI WSN-3280..................................................................................780999-01
NI WSN-3281..................................................................................781073-01
NI WSN-3282..................................................................................781074-01
NI WSN-3283..................................................................................781075-01
Connectivity Accessories
NI WSN-3284..................................................................................781076-01
NI WSN-3285..................................................................................781077-01
Power connectors...........................................................................780702-01
Power connector backshell kit........................................................196375-01
Outdoor Enclosure and Accessories
NI WSN-3291..................................................................................780994-01
NI WSN-3292..................................................................................195712-01
NI WSN-3293..................................................................................195738-01
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For complete product specifications, pricing, and accessory information,
call 800 813 3693 (U.S.) or go to ni.com/wsn.
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NI Wireless Sensor Network Ethernet Gateway
Specifications
Power Requirements
These specifications are typical at 25 °C unless otherwise noted.
Caution: Use the WSN-9791 with a 24 VDC, UL-listed, limited power source
» For complete specifications, see the NI WSN-9791 User Guide and
(LPS) supply. The power supply bears the UL-listed mark, LPS. It must also meet
Specifications manual at ni.com/manuals.
any safety and compliance requirements for the country of use.
Input voltage range................................ 9 to 30 V
Wireless Characteristics
Radio mode............................................ IEEE 802.15.4
Maximum required input power............ 4.5 W
RF data rate............................................ 250 kbits/s
Physical Characteristics
Indoor range........................................... Up to 90 m
Weight.................................................... Approx. 250 g (8.8 oz)
Outdoor range........................................ Up to 300 m
Weight with antenna............................. Approx. 259 g (9.1 oz)
Frequency band . ................................... ISM 2.4 GHz (2400 to 2483.5 MHz)
Dimensions............................................ See the NI WSN-9791 User Guide
Channels ............................................... 11 to 24
and Specifications manual
Due to regulations, the frequency bands depend on the country of operation.
2
Due to regulations, the valid channels depend on country of operation.
for device dimensions.
TX power
Environmental
1
2
1
Version
Maximum Radio Output
Americas
+17 dBm max (50 mW)
Europe/Asia
+10 dBm max
the system in a suitably rated enclosure.
Operating temperature.......................... -30 to 70 °C
Modulation type................................ DSSS (O-QPSK)
Receiver sensitivity........................... -102 dBm
Antenna
Connector.......................................... Female RP-SMA connector
VSWR................................................ MAX 2.0
Impedance......................................... 50 Ω
Directivity.......................................... Omni
Nominal gain.......................................... 1.5 dBi
Ethernet
Network interface.................................. 100BASE-TX, full-duplex;
100BASE-TX, half-duplex;
10BASE-T, full-duplex;
10BASE-T, half-duplex
Network protocols................................. TCP/IP, UDP
Network IP configuration....................... DHCP + Link–Local, DHCP, Static,
The WSN-9791 device is intended for indoor use only. For outdoor use, mount
Link–Local
Communication rates ............................ 10/100 Mbits/s, autonegotiated
Maximum cabling distance.................... 100 m/segment
(IEC-60068-2-1 and IEC-60068-2-2)
Storage temperature.............................. -40 to 70 °C
(IEC-60068-2-1 and IEC-60068-2-2)
Operating humidity................................ 10 to 90% RH, noncondensing
(IEC-60068-2-56)
Storage humidity.................................... 5 to 90% RH, noncondensing
(IEC-60068-2-56)
Maximum altitude.................................. 2,000 m
Pollution degree..................................... 2 (IEC 60664)
Shock and Vibration
Operating vibration, random.................. 5 grms, 10 to 500 Hz
(IEC 60068-2-64)
Operating shock..................................... 30 g, 11 ms half sine,
50 g, 3 ms half sine,
18 shocks at 6 orientations
(IEC 60068-2-27)
Operating vibration, sinusoidal.............. 5 g, 10 to 500 Hz
(IEC 60068-2-6)
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