Product Design & Development

Wireless And Serial Ethernet Radio Modems

Wednesday, August 11, 2004

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Wireless And Serial Ethernet Radio Modems

A variety of wireless serial and Ethernet radio modems are available, along with associated antenna, cable, adapter, and power plug accessories. The new line of modems is designed specifically for the industrial automation market and employs proprietary Frequency Hopping Spread Spectrum (FHSS) radio transmission technology. Two series of modems are available: The CR-HN series consists of versatile, 2.4 GHz FHSS wireless data modems. CR-HN radios are suitable for SCADA applications (as remote modems in multipoint configurations) and are a cost-effective solution for point-to-point installations. A DIN-rail mounted serial adapter box, one of the major components of the CR-HN series, resides in the control panel while the NEMA 4X radio module is mounted externally to the control panel to achieve the best line-of-sight link to the other radio antennas in the system. For most purposes, the CR-HN radio module incorporates an integral 6-dB antenna, creating a "single piece" modem. CR-HN modems start at $595. CR-SE series Ethernet radios are based on the same patented technology as the CR-HN serial radios. CR-SE series are low-cost, 2.4 GHz FHSS wireless data modems. They provide long-range, high-speed wireless connectivity among Ethernet devices in industrial settings. CR-SE radios have multipath fade rejection, as well as immunity to jamming. Typical CR-SE applications include wireless industrial automation and data collection, network bridging, PLC networking, and SCADA. CR-SE radios can function as a high-speed bridge to a distant Ethernet network node, or a CR-SE radio base station can be connected to multiple remote CR-SE radios to build a wireless Ethernet network. The higher gain antennas increase the range up to five plus miles. All CR-SE models enable long-range connectivity far beyond cabled Ethernet maximums. CR-SE modems start at $1,195.
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