National Instruments WSN-9791 User Manual

USER GUIDE AND SPECIFICATIONS

NI WSN-9791 Ethernet Gateway

This user guide describes how to use the NI Wireless Sensor Network WSN-9791 Ethernet gateway and
lists specifications. The NI WSN-9791 provides an Ethernet data acquisition interface. The
NI WSN-9791 combines with NI WSN-32xx nodes to form a wireless sensor network. Figure 1 shows
the components of the NI WSN system.

1

2

4

1 PC or NI Real-Time Hardware Running

Application Software

2 NI WSN-9791 Ethernet Gateway

5

3

3 NI WSN-32xx Nodes
4 Ethernet Cable/Connection
5 9–30 VDC Power Supply Connection

Figure 1. NI WSN System Components

3

Figure 2 shows a close up of the NI WSN-9791.

NI WSN-9791

117.54 mm
(4.628 in.)

146.88 mm
(5.783 in.)

165.94 mm
(6.533 in.)

60.18 mm
(2.369 in.)

112.97 mm
(4.448 in.)

88.33 mm
(3.478 in.)

3.088 in.

(78.44 mm)

51.29 mm
(2.019 in.)

44.32 mm
(1.745 in.)

87.50 mm
(3.445 in.)

Figure 2. NI WSN-9791 Ethernet Gateway

Dimensions

Figure 3 shows the NI WSN-9791 device dimensions.

NI WSN-9791 User Guide and Specifications 2 ni.com

Figure 3. NI WSN-9791 Device Dimensions

Safety Guidelines

Operate the NI WSN-9791 only as described in this user guide.

Hot Surface This icon denotes that the component may be hot. Touching this component may result

in bodily injury.

NI WSN Safety Information

The following section contains important safety information that you must follow when installing and
using NI WSN products.

Caution Do not substitute parts or modify the NI WSN product. Use the product only with the

devices, accessories, and cables specified in the installation instructions.

Caution Do not operate a NI WSN products in an explosive atmosphere or where there may be

flammable gases or fumes. If you need to operate NI WSN products in such an environment, the
NI WSN products must be in a suitably rated enclosure.

Caution If you need to clean a NI WSN product, use a dry towel. The product must be completely

dry and free from contaminants before you return it to service.

Caution Operate the product only at or below Pollution Degree 2. Pollution is foreign matter in a

solid, liquid, or gaseous state that can reduce dielectric strength or surface resistivity. The following
is a description of pollution degrees:

• Pollution Degree 1 means no pollution or only dry, nonconductive pollution occurs. The pollution
has no influence.

• Pollution Degree 2 means that only nonconductive pollution occurs in most cases. Occasionally,
however, a temporary conductivity caused by condensation must be expected.

• Pollution Degree 3 means that conductive pollution occurs, or dry, nonconductive pollution occurs
which becomes conductive due to condensation.

Caution You must insulate signal connections for the maximum voltage for which the NI WSN

product is rated. Do not exceed the maximum ratings for the product. Do not install wiring while
the product is live with electrical signals. Do not remove or add connector blocks when power is
connected to the NI WSN system. Avoid contact between your body and the connector block signal
wiring when hot-swapping devices.

1

Operate NI WSN products at or below the installation category

marked on the hardware label.
Measurement circuits are subjected to working voltages2 and transient stresses (overvoltage) from
the circuit to which they are connected during measurement or test. Installation categories establish
standard impulse withstand voltage levels that commonly occur in electrical distribution systems.
The following is a description of installation categories:

• Installation Category I is for measurements performed on circuits not directly connected to the

3

electrical distribution system referred to as MAINS

voltage. This category is for measurements of

voltages from specially protected secondary circuits. Such voltage measurements include signal

1

Installation categories, also referred to as measurement categories, are defined in electrical safety standard IEC 61010-1.

2

Working voltage is the highest rms value of an AC or DC voltage that can occur across any particular insulation.

3

MAINS is defined as a hazardous live electrical supply system that powers equipment. Suitably rated measuring circuits may
be connected to the MAINS for measuring purposes.

© National Instruments Corporation 3 NI WSN-9791 User Guide and Specifications

levels, special equipment, limited-energy parts of equipment, circuits powered by regulated
low-voltage sources, and electronics.

• Installation Category II is for measurements performed on circuits directly connected to the
electrical distribution system. This category refers to local-level electrical distribution, such as that
provided by a standard wall outlet (for example, 115 V for U.S. or 230 V for Europe). Examples
of Installation Category II are measurements performed on household appliances, portable tools,
and similar products.

• Installation Category III is for measurements performed in the building installation at the
distribution level. This category refers to measurements on hard-wired equipment such as
equipment in fixed installations, distribution boards, and circuit breakers. Other examples are
wiring, including cables, bus-bars, junction boxes, switches, socket-outlets in the fixed installation,
and stationary motors with permanent connections to fixed installations.

• Installation Category IV is for measurements performed at the primary electrical supply
installation (<1,000 V). Examples include electricity meters and measurements on primary
overcurrent protection devices and on ripple control units.

Safety Guidelines for Hazardous Locations

The NI WSN-9791 is suitable for use in Class I, Division 2, Groups A, B, C, D, T4 hazardous locations;
Class I, Zone 2, AEx nC IIC T4 and Ex nL IIC T4 hazardous locations; and nonhazardous locations
only. Follow these guidelines if you are installing the NI WSN-9791 in a potentially explosive
environment. Not following these guidelines may result in serious injury or death.

Caution Do not disconnect the power supply wires and connectors from the gateway unless power

has been switched off.

Caution Do not install or remove the gateway unless power has been switched off.

Caution Substitution of components may impair suitability for Class I, Division 2.

Caution For Zone 2 applications, install the WSN system in an enclosure rated to at least IP 54 as

defined by IEC 60529 and EN 60529.

Special Conditions for Hazardous Locations Use in Europe

The NI WSN-9791 has been evaluated as Ex nA nL IIC T4 equipment under DEMKO Certificate No. 07
ATEX 0626664X. Each gateway is marked II 3G and is suitable for use in Zone 2 hazardous locations,
in ambient temperatures of –40 °C ≤ Ta ≤ 70 °C.

NI WSN-9791 User Guide and Specifications 4 ni.com

Electromagnetic Compatibility Guidelines

This product was tested and complies with the regulatory requirements and limits for electromagnetic
compatibility (EMC) as stated in the product specifications. These requirements and limits are designed
to provide reasonable protection against harmful interference when the product is operated in its
intended operational electromagnetic environment.

This product is intended for use in industrial locations. There is no guarantee that harmful interference
will not occur in a particular installation, when the product is connected to a test object, or if the product
is used in residential areas. To minimize the potential for the product to cause interference to radio and
television reception or to experience unacceptable performance degradation, install and use this product
in strict accordance with the instructions in the product documentation.

Furthermore, any changes or modifications to the product not expressly approved by National
Instruments could void your authority to operate it under your local regulatory rules.

The following statements contain important EMC information needed before installing and using this
product:

Caution This product is intended for use in industrial locations. As a result, this product may cause

interference if used in residential areas. Such use must be avoided unless the user takes special
measures to reduce electromagnetic emissions to prevent interference to the reception of radio and
television broadcasts.

Caution Changes or modifications not expressly approved by National Instruments could void the

your authority to operate the hardware under the local regulatory rules.

Caution Operate this product only with shielded cables and accessories.

Related Documentation

Check ni.com/manuals for the most recent hardware documentation. For a complete list of
documentation related to the NI WSN system, refer to ni.com/info and enter rdwsnrd.

In addition to this guide, the following documents may be useful when configuring your NI WSN
system:

• NI Wireless Sensor Network Getting Started Guide

• NI WSN-32xx User Guide and Specifications

• Configuring WSN in MAX, available from Start»All Programs»National Instruments»NI-WSN

• The NI-WSN book on the Contents tab of the LabVIEW Help available by selecting Help»Search
the LabVIEW Help in LabVIEW

• NI-WSN Readme, available on the software installation disc included with your device.

Training Courses

If you need more help getting started developing an application with NI products, NI offers training
courses. To enroll in a course or obtain a detailed course outline, refer to

ni.com/training.

Technical Support on the Web

For additional support, refer to ni.com/support or zone.ni.com.

© National Instruments Corporation 5 NI WSN-9791 User Guide and Specifications

Software Overview

Note Refer to the NI WSN Readme, available on the software installation disc included with your

device, for NI software application version support.

The NI-WSN software includes NI Measurement and Automation Explorer (MAX) as well as server and
driver software for easy integration into application software packages. These software components
manage the low-level communications and hardware details, simplifying programmatic access to
I/O channels. The NI-WSN software is on the software installation disc included with your
NI WSN-9791 gateway device. The NI-WSN software is supported by Windows 7/Vista/XP and
contains the following components:

•NI MAX

• NI-WSN software

You can download a current version of the NI-WSN software from
browser, go to ni.com/support and select Drivers and Updates»Distributed I/O»Wireless Sensor
Networks, then select the latest version of NI-WSN software. If you are using other software, refer to
the installation instructions that accompany your software.

What You Need to Get Started

To set up and use NI LabVIEW for WSN with the NI WSN-9791, you need the following:

• NI WSN-9791 Ethernet Gateway device(s), with 9–30 V power supply

•NI WSN-32xx node devices with a 9–30 V power supply or four 1.5 V AA alkaline for each node

• Mounting hardware (DIN rail, panel-mount, or rack mount accessory)

• Ethernet cable/connection

• Screwdrivers: a 1/8 in. flathead and a number 1 Phillips

• NI-WSN software version 1.1 or later

• Host PC running Windows 7/Vista/XP

• NI LabVIEW version 8.6.1 (32-bit) or later

• NI LabVIEW Real-Time Module (32-bit)

• Related hardware and software documentation

• Optional accessories

• DIN rail terminal blocks

• I/O cables and sensors

• Mounting accessory

ni.com/support. Using your web

NI WSN-9791 User Guide and Specifications 6 ni.com

Unpack the Devices and Install the Antenna

Remove the devices from the package and inspect the device. Contact NI if the device appears damaged.
Do not install a damaged device.

Caution The device is static sensitive. Always properly ground yourself and the equipment when

handling or connecting to the device.

To attach the antenna, align the antenna with the mount and screw it on as shown in Figure 4.

Caution The antenna must be attached to the NI WSN device in order for the NI WSN device to

function correctly.

Figure 4. Attach Antenna to Device

Mounting the NI WSN-9791 Device

You can mount the NI WSN-9791 device on a panel or on a 35 mm DIN rail. For kit accessory ordering
information, refer to the accessory section of the NI WSN product page at

Caution Your installation must meet the following requirements:

• Allows 25.4 mm (1 in.) of clearance above and below the NI WSN-9791 device for air
circulation.

• Allows 50.8 mm (2 in.) of clearance in front of modules for common connector cabling, such as

the 2-position detachable screw terminal connector

ni.com.

.

© National Instruments Corporation 7 NI WSN-9791 User Guide and Specifications

NI WSN-9791

3.18 mm
(0.125 in.)

3.18 mm

(0.125 in.)

114.30 mm

(4.500 in.)

45.72 mm
(1.800 in.)

55.88 mm
(2.200 in.)

101.60 mm
(4.000 in.)

Note Figure 5 is an actual size template. You can print it out and use it to determine screw hole

placement for panel mounting.

Figure 5. NI WSN-9791 Panel Mount Dimensions Template

NI WSN-9791 User Guide and Specifications 8 ni.com

Using the Integrated Panel Mount Feature

4.500 in.

(114.30 mm)

The NI WSN-9791 integrated panel mount feature accepts number 8 or M4 pan head screws to secure
the device onto a flat surface. To install the NI WSN-9791 on a flat surface, complete the following
steps:

1. Prepare two holes in your panel 4.448 in. (112.97 mm) on center to accept the number 8 or M4 pan
head screws or bolts.

2. Install the front screw first in the mounting panel leaving .08 in. space under the head of the screw.

3. Slide the NI WSN-9791 front mount under this screw.

4. Fasten the rear screw into place through the rear enclosure mount of the NI WSN-9791.

© National Instruments Corporation 9 NI WSN-9791 User Guide and Specifications

Figure 6. Using the Integrated Mount Feature