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Produttore : Black Box
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Black Box Corporation. Free 24-hour tech support: 724-746-5500 blackbox.com 1 of 412/13/2010 #15626 Industrial Modem RF115 Wireless async communication that stands up to extreme conditions—without sacrificing data quality or speed. » Data speeds of up to 115.2 kbps half duplex. » Supports a distance of up to 20 miles (32.2 km) for line of sight, up to 60 miles (96.6 km) with 2 repeaters. » 10- or 11 bit word structure. » Offers Modbus RTU protocol support. » Optional antennas available omnidirectional and unidirectional. Features » Data speeds of up to 115.2 kbps half duplex. » Supports a distance of up to 20 miles (32.2 km) for line of sight, up to 60 miles (96.6 km) with 2 repeaters. » 10- or 11 bit word structure. » Offers Modbus RTU protocol support. » Optional antennas available omnidirectional and unidirectional. Features OVERVIEW The Industrial Modem RF115 is designed to stand up to electromagnetic and radio interference, industrial motors, and temperature extremes found in oil and gas fields and refineries, utility substations, manufacturing floors, military installations— anywhere ordinary equipment can’t go. This wireless async modem uses Spread-Spectrum technology to speed your data to its final destination—safe and error-free. Data travels over the license-free 902–928-MHz radio band. You can use two modems in a point-to-point configuration and receive incoming signals from a remote control device. Or use the modem in a polled multipoint configuration and communicate with multiple remote devices. The Modem’s DB9 connector is an RS-232 interface. Optional RS-485 Modules are also available. Each Industrial Modem includes a fixed whip antenna with a 20-mile (32.2-km) line-of-sight range. The modem can also be outfitted with any of our optional antennas. Choose from omnidirectional or unidirectional antennas—in a variety of cable lengths and mounting options. For additional security, the modem features voltage clamps and fuses to protect your transmissions from electrical surges found on power lines. Still Compatible If you already have an Industrial Modem RF115, don’t worry— the MDR100A-R4 is compatible with older models and antennas. We also offer adapter cables for attaching older Industrial Modem RF115s to newer antennas or attaching older antennas to newer Industrial Modem RF115s. Choosing the Right Antenna for Your Industrial Modem RF115 For ordinary line-of-sight installations, the built-in antenna may be all you need. If you can’t get a direct line of sight without separating the modem from the antenna, choose one of our Omnidirectional Antennas. If you need to transmit through trees or non-metallic structures— or if you want to increase signal-to-noise ratio—choose a Yagi (unidirectional) Antenna with Bracket Mount. Remember, you always need a direct line of sight in any application over a 0.25- to 0.5-mile (0.4- to 0.8-km) range. Why Buy From Black Box? Exceptional Value. Exceptional Tech Support. Period. Recognize any of these situations? According to a survey by Data Communications magazine, 90% • You wait more than 30 minutes to get through of network managers surveyed say that getting the technical support they need is extremely important when choosing a vendor. But even to a vendor’s tech support. though network managers pay anywhere from 10 to 20% of their • The so-called “tech” can’t help you or gives you overall purchase price for a basic service and support contract, the the wrong answer. technical support and service they receive falls far short of their • You don’t have a purchase order number and the expectations—and certainly isn’t worth what they paid. tech refuses to help you. At Black Box, we guarantee the best value and the best support. • It’s 9 p.m. and you need help, but your vendor’s tech support line is closed. You can even consult our Technical Support Experts before you buy if you need help selecting just the right component for your application. Don’t waste time and money—call Black Box today. 724-746-5500 blackbox.com 2 of 412/13/2010 #15626 technically speaking Spread-Spectrum Technology Explained Unlike conventional radio, Spread Spectrum doesn’t stick to one frequency. During transmission, Spread-Spectrum signals are spread over a wide range of frequencies. Then a receiver collects (de-spreads) the transmissions into their original form. The Spread-Spectrum signal is then tagged with a pseudo random code. Only the user’s receiver recognizes this code. The receiver knows in advance how the transmitter will spread the spectrum, so it can easily find the signal and track the transmission. To do this, the receiver uses a locally generated replica pseudo random noise code, a received code, and a receiver correlator to separate only the desired coded information from all possible transmitters. (Think of the correlator as a filter that responds to signals encoded with a pseudorandom noise code that matches its own code.) No Interference The correlator is not susceptib...