CONEL CGU 04i — описание беспроводного модуля связи для передачи данных [5/56]

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CGU 04i DESCRIPTION

2. Description of the communication module CGU 04i

2.1. General

GSM/GPRS communication module CGU 04i is a wireless data transmission device.

The communication module is one of the basic elements of AGNES GPRS system.

The system AGNES characteristics are described in reference [1]. GSM-GPRS infrastructure

is used for the wireless communication as a line layer. ARNEP protocol is implemented above

the line layer. The protocol ARNEP is described in reference [2]. On its basis the modules

create virtual private data network where data can be transferred between user devices via

any protocols.

One may simply imagine the CGU 04i module as a protocol converter between

the user device (PLC automatic, PC, data terminal, etc.) and GSM-GPRS infrastructure

of a mobile network operator, it provides the user with possibility to communicate simply

between all the systems. Apart from data transfers via GPRS the CGU 04i module enables

SMS.

The radio component GSM-GPRS is built in the CGU 04i module, consisting module

Cinterion.

GSM-GPRS module CGU 04i is controlled by communication 32-bit microprocessor.

It ensures GSM-GPRS communication, data transfer on serial user interfaces and a number

of diagnostic and service features. CGU 04i module in the basic version has one serial user

interface (communication port) RS232, one interface for direct connection of inputs

and outputs (CIO) for data collection and technological process management and one optional

user interface (RS232, RS422, RS485, M-BUSD, CNT). It is possible to set transfer

parameters and communication protocol for each user interface separately. As a result you

may communicate with various user interfaces using different communication protocols on

serial interface.

2.2. Examples of possible applications

• Security systems

• Telematics

• Telemetry

• Vending and dispenser machines

2.3. Compatibility with other Conel company modems

Regarding the communication and data transfers the CGU 04i module is compatible

with the older CGU 04 type (or CGU 02). This means it is possible to combine both types

in one network and simply extend an existing network of CGU 04 (CGU 02) modules

with new communication points using CGU 04i modules. CGU 04i provides some features not

included in the older CGU 04 type.

User and industrial communication protocol implemented on serial interfaces are

compatible with the protocols used for Conel radio modems (e.g. CDA 70). Thus you may

establish complex combined data networks consisting of both radio and GPRS modems.