LEGRAND Wattstopper WBT900-IP Installation Instructions

No: 25176 – 2/17 rev. 1
Catalog Number • Numéro de Catalogue • Número de Catálogo: WBT900-IP
Country of Origin: Made in China • Pays d'origine: Fabriqué en Chine • País de origen: Hecho en China
The WBT900-IP is designed to transport BACnet-IP communication data over short to extended ranges using the 900 MHz frequency
(902-928). All devices are plug-and-play requiring no special programming tools. Using a web browser or patch cable synching , radios
can be addressed to one another in the field. All WBT900-IP transceivers are shipped by default as a Client/Subscriber.
The WBT900-IP Transceiver allows the user to create a long-range, wireless BACnet-IP network with numerous Client units (up to 16)
per Server transceiver.
Configuring a wireless link with the WBT900-IP requires the establishment of five elements:
1. Each radio must know whether it is to be a Server or Client.
2. The Server must know how many Clients are expecting communication with it.
3. The Server and any given Client must agree on which radio frequency channel they are using.
This can be set manually using a HyperTerminal interface and preconfigured configuration files.
4. The Client must be assigned a unique subscriber ID to specify which time division slot it will use when communicating with the
Server.
5. The Server and any given Client must share a common 128-bit encryption key and Network ID.
The Server automatically scans for the best of the 12 available radio frequency channels, encrypts BACnet-IP data received from
the network, and transmits it wirelessly to the correct Client. The Server is constantly monitoring the radio link and can automatically
change the channel if performance is degraded due to interference. If two Server units are very close to one another, they may interfere
if operating on adjacent frequency channels. Place them at least 20 feet apart or manually select non-adjacent channels for their
operation. Also, the Client should be placed at least 10 feet from the Server to avoid overloading the WBT900-IP receiver.
900 MHz Channel Table
1 903.12500 MHz
2 905.20833 MHz
3 907.29167 MHz
4 909.37500 MHz
5 911.45833 MHz
6 913.54167 MHz
WARNING: If using AC power option, a 24 VAC isolation transformer must be used! Ensure neither of the two secondaries are bonded.
NOTE: As with any RF network, plan ahead for proper antenna selection and placement. It is the intention of Wattstopper to provide
a reliable wireless communication device for existing BACnet MSTP networks. However, in some conditions, reliability is
determined largely by correct antenna placement, which is the responsiblity of the installer. This product is NOT TO BE USED
in situations where life safety issues may arise. Wattstopper makes no claims, expressed or implied, of the product's usefulness
with regard to specific applications. Determination of the product's suitability for a particular application is the sole responsibility
of the purchasing parties. In any installation, ensure the devices are properly protected from the elements by installing in an
appropriate enclosure. Additional surge protection devices may be necessary to protect from lighting and/or power surges.
WARNING: Extra care must be taken when attaching the antenna to the bridge unit. Finger tight is sufficient, using tools may damage
the RPSMA connector if over tightened.

DESCRIPTION AND OPERATION

7 915.62500 MHz
8 917.70833 MHz
9 919.79167 MHz
10 921.87500 MHz
11 923.95833 MHz
12 926.04167 MHz
Wattstopper
Wireless BACnet IP Bridge
Installation Instructions • Instructions d'Installation • Instrucciones de Instalación

SPECIFICATIONS

Volts ...............................................................12-24 VAC or VDC
UL Standards Tested ................................ UL 2043 plenum rated
902-928MHz Direct Sequence Spread Spectrum (DSSS)
Synchronous point-to-multipoint communication
Special Features
Includes unity gain antenna
AES 128-bit encrypted payload protection
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