GPRS Modem

The NDACS 6000 data logger which controls the data link operations can be fitted with a GPRS modem, use

- GPRS on part numbers to reference this option.

The following examples shows how to connect remote NDACS 6000 based tide monitoring systems to a central data server using standard direct mobile phone data link (CSM) or GPRS modem.

Direct Connection (CSM)

Any PC with a modem that can make a dial-out call can be used to connect directly to the NDACS instruments. The NDACS automatically answers an incoming telephone call and enables the user to see real-time information, make configuration changes and download information. If a call is accidentally disconnected the NDACS will reset the modem after a pre-set time.

In order to maximise the dial-up data link speed and to stay connected to the instrument continually a GPRS modem option is available and plugs in to the NDACS logger like any other device.

GPRS data costs are charged on the amount of data transferred and not the time over which the connection is made.

An NDACS 6000 instrument which acts as the data logger for the Keynes Controls tide monitoring systems accepts wireless as well as standard fixed line dial-up modems. Standard GSM and GPRS wireless modems can be directly attached to the logger unit without loading any software

as long as they support the industry standard Hayes compatible command set. When using the wireless modems the monitoring systems can be deployed anywhere there is a mobile phone service and access to the real-time data, automatic reports as well as stored data can be made anytime

Dual Band EGSM/GPRS modem (900/ 1800 Mhz) designed for data, fax SMS and voice applications.

·	RS-232 and audio through mini-sub D 15-pin connector supporting: Baud rate from 300 to 115,200 bits Autobauding.

Fully Type Aproved
Fully compliant with ETSI GSM Phase 2+
specifications (Normal MS)

Power supply through micri-FIT

4-pin connector

Sliding SIM Holder

Power Supply:
Input voltage: 5.5 -32V

·	5mA in idle mode, 140 mA in

communication GSM 900 @ 12V

·	5 mA in idle mode , 100mA in

communication GSM 1800 @ 12V

·	Peak 1.7A @ 5.5V

AT commands interface:

- GSM 07:05 and 07:07 AT commands

- comprehensive set of enhanced AT commands

·	SMS antenna connector

Data circuit asynchronous transparent and non transparenet up to 14,400 bits/s MNP2, V.42bic

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