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Manual RTcom Radio Modems

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Summary
  • RTcom Radio Modems - page 1

    User Manual RTcom-Universal, Global Max and Outback Radio Modems Copyright Radio-Tech Limited 1998-2000 ...

  • RTcom Radio Modems - page 2

    2 CONTENTS INTRODCUTION 3 Selecting the frequency of operation 5 R.F Path Surveys 5 INSTALLATION Power Supplies 6 Location 6 Antenna Feeders 7 Lightning Surge Protection 8 Antenna Installation 9 Antenna Options 10 GENERAL ARANGEMENT RTcom-Global and Universal 11 RTcom-Outback 12 RTcom-Max 12 CONNECTIONS Data and Power 13 CONFIGURATION Operating Mod ...

  • RTcom Radio Modems - page 3

    3 INTRODUCTION The RTcom-range of radio modem is intended as a direct replacement for cables over short, medium and long distance, serial data links. They are suitable for part of point-to-point, master to slave or scanning telemetry links, where the modem is either used on its own our in conjunction with existing cables. The modems also operate tr ...

  • RTcom Radio Modems - page 4

    4 In many countries it is quite legal to operate systems without need for operating licences. These countries include the United Kingdom, Australia, New Zealand, Korea, South Africa, Scandinavia and the majority of Europe. However, operation in these countries is normally subject to the equipment first being approved to a defined standard, such as ...

  • RTcom Radio Modems - page 5

    5 Frequency of operation Often there is not a choice over operating frequency. In most countries frequency allocations are very limited, by way of example in Europe there is only 433-435MHz UHF or 868-870MHz SHF. While the UK and many others offer VHF, UHF and SHF allocations. However other frequencies may be used subject to local government licenc ...

  • RTcom Radio Modems - page 6

    6 If there is doubt over the signal reaching the receiver a path survey should be conducted. The outback modem includes a test mode that places the modems transmitter into constant transmit mode. This permits the measurement of signal strength at the receiver. Normally our modems will work satisfactorily with a signal level below 1uV (-107dBm). INS ...

  • RTcom Radio Modems - page 7

    7 For battery powered operation in cold and damp climates the only reliable way to achieve long term operation is to use double IP65/7 enclosures, with both the outer and inner enclosure fitted with silica gel desiccant sachets. Please be aware that solar heating and wind chill can take the modem beyond its designed operating temperature range. Fur ...

  • RTcom Radio Modems - page 8

    8 Lightning Surge Protection: A direct lightning strike can never be totally protected against or predicted. Currents exceeding 10,000A can flow vaporising antenna, feeders, towers and other such structures. Lightning conductors will give a degree of protection to the building but not always to the electronic apparatus within. Generally the probabi ...

  • RTcom Radio Modems - page 9

    9 Antenna Installation The type and location of the antenna used can have a profound effect on your overall system performance and its legality. In point to point links it is good practice to make efficient use of the radio spectrum by selecting an antenna that will project the R.F energy into the direction of desired operation and similarly at the ...

  • RTcom Radio Modems - page 10

    10 Warning : The use of gain antenna in some countries is not permitted. Similarly where ERP (transmitted power limits) are imposed the actual transmitted power must not exceed the limit stated. This means that the transmitter output power, less any coaxial feeder losses, plus the antenna gain must not exceed the specified maximum ERP. Before insta ...

  • RTcom Radio Modems - page 11

    11 Guide to your RTcom-Global & Max Modem Status LED's 12-24V dc supply RS422 & RS485 Interface RS232 interface Links to select 2-4 wire RS485 Mode Switch for Data Rate and data format Channel selection switch (Global Only, See Table) Mode Switch for RS232 / RS485 Modes Carrier Detect LED (Global only) Reset Button ...

  • RTcom Radio Modems - page 12

    12 Guide to your RTcom-Outback Guide to your RTcom-Max (Please take care when opening cover) Optional Location for Battery Solar/12-24V dc supply RS422 & RS485 Interface RS232 interface Links to select 2-4 wire RS485 Configuration Mode Switch Radio Module mounted in cover Connections as per Global Modem ...

  • RTcom Radio Modems - page 13

    13 CONNECTIONS Data connections should always be made using screened cable. This will insure maximum rejection of interference from outside sources. Always use a common ground point. The RTcom Global, Eurpoa, MAX and Outback modems support RS232, RS422 and RS485 communications, both 2 and 4-wire. The RS232 port should be used for short cable runs o ...

  • RTcom Radio Modems - page 14

    14 Pin Number Designation WRT Modem Notes 1 DCD Optional not normally needed 2 RX (data) RS232 input data to modem 3 TX(data) RS232 output data from modem 4 RTS Optional not normally needed 5 GND Ground 6 B RX(-) RS485/RS422 7 A RX(+) " 8 +Vs Supply 7.5 to 15V dc 9 N/C 10 GND Ground 11 Z = TX(-) RS485/RS422 12 Y = TX(+) " 13 +Vs Optional ...

  • RTcom Radio Modems - page 15

    15 On the Global and Max modems two dip switches are provided for the selection of the desired operating mode and two plug links are provided from the selection of 2 or 4 wire RS485 operation. A further DIP switch is provided on the Global modem for frequency Channel selection. Switch Number Function 1 Baud Rate (See Table) 2 Baud Rate (See Table) ...

  • RTcom Radio Modems - page 16

    16 OPERATION The RTcom protocol permits 100% transparent operation and direct cable emulation. Simply what goes in comes out! R.F. packet framing, code balancing, encryption and preambles etc are taken care of automatically within the modem. Standard industrial communications protocols such as Modbus include a secure CRC 16 or 32 error check code o ...

  • RTcom Radio Modems - page 17

    17 COMMISSIONING The data rate, parity and number of data bits are set using the dual in line switch located above. If a scanner is available the chosen channels and the adjacent channels should be scanned for activity. With frequency agile products such as the Max and Global a fee channel should be selected as far away as possible from the channel ...

  • RTcom Radio Modems - page 18

    18 system. This results in the messages becoming fragmented, thus confusing the modem into thinking the end of file has been detected. The other common problem, in particular with WindowsTM Hyper Terminal, is the way in which is deals with errors. Should an error occur it attempts to re-establish the link from both ends simultaneously, something of ...

Manufacturer RTcom Category Network Card

Documents that we receive from a manufacturer of a RTcom Radio Modems can be divided into several groups. They are, among others:
- RTcom technical drawings
- Radio Modems manuals
- RTcom product data sheets
- information booklets
- or energy labels RTcom Radio Modems
All of them are important, but the most important information from the point of view of use of the device are in the user manual RTcom Radio Modems.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals RTcom Radio Modems, service manual, brief instructions and user manuals RTcom Radio Modems. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product RTcom Radio Modems.

Similar manuals

A complete manual for the device RTcom Radio Modems, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use RTcom Radio Modems by users. Manuals are usually written by a technical writer, but in a language understandable to all users of RTcom Radio Modems.

A complete RTcom manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual RTcom Radio Modems - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the RTcom Radio Modems, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the RTcom Radio Modems, that we can find in the current document
3. Tips how to use the basic functions of the device RTcom Radio Modems - which should help us in our first steps of using RTcom Radio Modems
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with RTcom Radio Modems
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of RTcom Radio Modems in a specific country, if it was not possible to solve the problem on our own.

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