HN-291 Datasheet, PDF (3/3 Pages) Murata Manufacturing Co., Ltd. – 900MHz Frequency Hopping Wireless Data Modem

Versatility
The HopNet 291 (HN-291) is a versatile, low cost, multi-purpose 900MHz frequency-hopping wireless data modem. Built around the WIT910 radio, the HN-
291 has an integral 5dB patch antenna creating a "single piece" modem. Communication with the HN-291 is through a 115.2Kbps asynchronous serial port
supporting a standard RS-232 interface, a USB version is also available. The HN-291 communicates over the air at 172.8Kbps and supports both point-to-
point and point-to-multipoint networks.
Simplicity
With a NEMA 4X weatherproof enclosure and aluminum mounting flange, the HN-291 is simple to install on the side of a building or attached to a mast.
With no antenna to connect, the HN-291 is simply mounted where the antenna would ordinarily be mounted. This removes the need for long antenna cable
runs, expensive both in terms of cost and performance.
Useability
The HN-291 comes with a 50-foot cable that connects to an indoor Serial Adapter Box (included) that provides a standard RS-232 serial 9-pin D connection.
The HN-294 comes with just a 4-foot cable when long cable runs are not needed. The Serial Adapter Box also provides power to the HN-291 through a
universal 110/220 50/60 wall-mount power supply (also included). The integral 5dB patch antenna provides a line-of-site range of 20 miles, making the HN-
291 ideal for a variety of long range applications. For applications requiring more antenna gain, the HN-291X replaces the built-in patch antenna with an
external reverse TNC connector.
When paired with the RFM SNAP910 family of products, the HN-291 provides a cost-effective link from remote devices to Ethernet/IP-based applications.
These applications include Intranet-based applications as well as Internet access. The HN-291 also is ideal for use in SCADA applications as remote
modems in multipoint configurations and is an extremely cost-effective solution for point-to-point installations. The HN-291 has software-selectable transmit
power levels of 10mW, 100mW, 250mW and 500mW.
Based on RFM’s WIT910 spread spectrum frequency-hopping radio, the HN-291 has exceptional multipath fade rejection as well as immunity to jamming.
The WIT910 is based on field proven technology that delivers robust, reliable real world performance.
The HN-291 is FCC certified and operates in the license-free 900MHz band.
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©2008 by RF Monolithics, Inc.
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HN-291 - 4/10/08