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
