CONTENTS
2
Contents
1. SAFETY INSTRUCTIONS......................................................................................................4
2. DESCRIPTION OF THE COMMUNICATION MODULE CGU 04I .........................................5
2.1. General ............................................................................................................................5
2.2. Examples of possible applications ...................................................................................5
2.3. Compatibility with other Conel company modems ...........................................................5
2.4. Description of CGU 04i components................................................................................6
2.4.1 GSM module...............................................................................................................6
2.4.2 Control microprocessor ..............................................................................................6
2.4.3 Telemetric inputs and outputs ....................................................................................7
2.4.4 Optional hardware interface PORT2 ..........................................................................7
2.4.5 User interface protocols..............................................................................................8
2.4.6 Sleep mode ................................................................................................................8
2.5. Technical parameters.......................................................................................................9
2.6. Module status indication.................................................................................................10
2.7. User interfaces (connectors)..........................................................................................11
2.7.1 PORT1 (PORT2) connector - RS232 .......................................................................12
2.7.2 PORT2 connectors...................................................................................................14
2.7.3 Connector PORT2 - RS485......................................................................................14
2.7.4 Connector PORT2 - RS422......................................................................................16
2.7.4.1 Connector PORT2 – MBUSD ................................................................................18
2.7.4.2 Connector PORT2 – CNT......................................................................................20
2.7.5 CIO connector ..........................................................................................................21
2.7.6 PWR supply connector.............................................................................................23
2.8. Antenna connection .......................................................................................................25
2.9. Technical specifications of port 2...................................................................................25
2.10. CGU 04i settings..........................................................................................................28
2.11. Service cable................................................................................................................28
2.12. Standard accessories...................................................................................................29
2.13. Additional accessories .................................................................................................29
2.14. Assembly procedure ....................................................................................................30
2.15. Mechanical external dimensions and mounting recommendations..............................32
2.16. Product marking...........................................................................................................35
2.17. PORT2 marking ...........................................................................................................35
2.18. CGU 04i production label.............................................................................................35
2.19. Expansion ports labels.................................................................................................36
2.20. Basic parameters description.......................................................................................37
3. QUALITY OF THE GPRS SIGNAL.......................................................................................42
3.1. Antenna installation for modems....................................................................................42
3.2. Good quality GPRS requirements:.................................................................................42
3.3. Example, station received these signals: .......................................................................42
3.4. Method of signal measurements....................................................................................43
3.5. AT^MONI command meaning........................................................................................43
3.6. AT^MONP command meaning ......................................................................................44
4. EXPANSION PORT MOUNTING .........................................................................................45
5. CIO – ANALOGUE INPUTS AND BINARY OUTPUTS ........................................................47
5.1. Description of I/O signal evaluation and reception.........................................................47
