Black Box Industrial Modem RF115 Manuel utilisateur

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Industrial Modem RF115

Wireless async communication

that stands up to extreme

conditions—without sacrificing

data quality or speed.

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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

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

RF115 s 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.

OVERVIEW

Recognize any of these situations?

• Youwaitmorethan30minutestogetthrough

to a vendor’s tech support.

• Theso-called“tech”can’thelpyouorgivesyou

the wrong answer.

• Youdon’thaveapurchaseordernumberandthe

tech refuses to help you.

• It’s9p.m.andyouneedhelp,butyourvendor’s

tech support line is closed.

According to a survey by Data Communications magazine, 90%

of network managers surveyed say that getting the technical support

they need is extremely important when choosing a vendor. But even

though network managers pay anywhere from 10 to 20% of their

overall purchase price for a basic service and support contract, the

technical support and service they receive falls far short of their

expectations—and certainly isn’t worth what they paid.

At Black Box, we guarantee the best value and the best support.

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.

Why Buy From Black Box? Exceptional Value.

Exceptional Tech Support. Period.

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#15626

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 susceptible to man-made interference

or other noises—whether natural or generated by other Spread-

Spectrum radios. The code simply sounds like background noise,

so it’s difficult for an unauthorized user to detect.

No Jamming

To prevent jamming, the de-spreading process spreads

(decreases) the power level of other signals.

How the Technology Caught On

Low susceptibility to interference and anti-jamming features—

plus the ability to tolerate high levels of electromagnetic and

multipath interference—are what prompted the United States

military to use the technology during World War II.

Spread Spectrum and the FCC

In 1985, the FCC let radios based on a Spread-Spectrum

modulation method operate without a license in certain portions

of the radio spectrum. The three frequencies the FCC specified

for commercial Spread Spectrum are:

• 902MHzto928MHz

• 2400MHzto2483.5MHz

• 5725MHzto5850MHz.

Why the Technology is Popular Today

Spread-Spectrum technology is the ideal medium for wireless

data transmission for a number of reasons:

• Transmissionsremainfreefrominterferenceandjamming.

• Transmissionscanbespecificallyaddressed.

• Multipleconversationscanoccursimultaneouslyinrelatively

small areas.

• Dataratescanbeveryhighifyouusethe2400band

or higher.

Technically Speaking

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Tech SPecS

Speed —Upto115.2kbpshalf-duplex(upto57.6kbpsfull-duplex)

Protocol — Async, Modbus RTU support

Distance — Up to 20 miles (32.2 km) line-of-sight, depending on environment,

geographicconditions,andoptionalantenna;upto60miles(96.6km)

with 2 repeaters

Hopping Code — 15 orthogonal user-selectable pseudorandom algorithms

Occupied Bandwidth — 230 KHz

Spreading Function — Frequency-hopping 112 channels

(96channelsinternational)

Word Length — 10-/11-bit maximum

Radio Frequency — 902- to 928-MHz spread spectrum;

No FCC license required

RF Output Power — 1⁄10 to 1 watt (selectable in 1⁄10 increments)

Interface — RS-232 (can support

2- or 4-wire RS-485 with the optional RS-485 Modules)

Connectors — RS-232: DB9; Antenna: Standard-thread

SMA F; RS-485: 2- or 4-wire screw terminal strip

Indicators — P (Power), C (Carrier), I (Data In), O (Data Out)

Operating Environment —-40to+167°F(-40to+75°C)

Relative Humidity Tolerance — Up to 95%, noncondensing

Power — 12 VDC (24 VDC available as special order);

115- or 230-VAC wallmount transformer included

Size —1.4"Hx5"Wx7.8"D(3.6x12.7x19.8cm)

Weight — 1.8 lb. (0.8 kg)

Item Code

Industrial Modem RF115

MDR100A-R4

RS-485 RF Modem Module

2-Wire

MD3310-R2

Optional RF Antennas

Omnidirectional with Bracket Mount

10-ft. (3.0-m) Cable

MDR151-0010-R2

  25-ft.(7.6-m)Cable 

MDR151-0025-R3

50-ft. (15.2-m) Cable

MDR151-0050-R3

100-ft. (30.4-m) Cable

MDR151-0100-R3

Yagi (Unidirectional) with Bracket Mount

50-ft. (15.2-m) Cable

MDR152-0050-R4

100-ft. (30.4-m) Cable

MDR152-0100-R4

You may also need…

DB9 Extension Cable with EM/RFI Hoods

EDN12H

Standard SMA Male to

“N” Type Male Adapter Cable

MDR153

The MDR1000A-R4 has a

fixed-whip antenna but can also be

used with an optional RF antenna.

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