InDTU is used to connect a serial device. It can support either GPRS or CDMA mobile network. InDTU 131 Stable, reliable, highly-integrated, industrial standard applications. Product Overview: With the improvement and development of modern industry and technology, the demand of using network in industry control domain becomes more obvious and is rising steadily. The industry control applications have developed gradually from the traditional on-site mode to the remote monitor mode. The powerful Internet and maturing data communication technologies break the restriction of distance, thus the industry control network becomes extended. Based on the wide coverage and easy access of the 2.5G mobile network, it was adopted as the carrying network to do the data collection and data transfer. The mobile GPRS/CDMA network can provide a reliable data transfer meaning. With its properties of mobile access, Internet connection and reasonable data transfer rate, the mobile network is suitable for remote data collection and wide area network construction. We developed the InDTU mobile data terminals unit (DTU) series based on the GPRS/CDMA network. They are mainly used to connect control devices with serial port interfaces. The InDTU can either collect data from the control devices or send it to the control centers or can send data from control centers to the control devices. The InDTU also support different kinds of protocol bridging. The InDTUs are used as the main components of a M2M network configuration. They are suitable for various of industrial control applications. Features: Easy to cover wide area; Easy to construct network; Support further application development; Cost effective; Take advantage to use the Public Network; No network maintenance cost; The cost is charged by data flow; Applicable to control devices distributed in wide area with middle and small data flow Applicable to complicated network structures; Applicable to mobile control devices, such as devices on locomotives and auto vehicles; Technical Specifications Function Types Function Names Function Descriptions Notes Basic Functions Broad voltage support 9~24V DC input GPRS/CDMA network support GPRS/CDMA network support InDTU 131 series Serial port configuration Configuration via exterior serial ports is available. Operating status indication LED displays the operating status. Installation type Can be installed on the track rail of the industry cabinet Reset Exterior Reset interface is provided to reset InDTU Mobile DDN support Based on China Mobile’s mobile DDN service InDTU 130 series Transparent data transfer Transparent two-way data transfer is adopted Protocol convertibility function Enable modbus rtu modbus tcp, Convertibility according to customers’ needs is available. InDTU 131CBG, InDTU 131GBG Long connection mode Real time connection with application server is available. Short connection mode Short connection application server mode can be accomplished by configuration activation strategy. Local data activation Activate InDTU to connect to network by local data sending when DTU is in dormancy under short connection mode. Phone call activation Activate InDTU to connect to network by phone call when DTU is in dormancy under short connection mode. Time activation/time disconnection Timely activate DTU to connect or disconnect to network by configuration. Multi-center support Can support 1~5 data centers InDTU 131GDC，InDTU 130CDC Log function Opening the logs and exporting logs via serial ports is available through configuration, thus facilitate engineering personnel to view the operating status. Multi-port communication rate Supported Baud rate：2400~115200bps RS 232/485/422 Support RS 232 | RS 485 | RS 422 communication Interfaces vary with different types. Watchdog function of hardware and software Watchdog mechanism prevents InDTU crash Network Functions PPP protocol support Dial-up protocol CHAP authentication Authentication mode PAP authentication Authentication mode PPP layer heartbeat Maintain the connection with the network of operators, prevent forcible dormancy, and monitor the stability of the dial-up connection. TCP layer heartbeat Monitor the application server at the application layer Application Layer heartbeat Application layer heartbeat was adopted to monitor the connection with application server. Advanced Functions Upgrade function Upgrade the unit via local serial ports Configuration import/export function It is available to export internal configuration of InDTU, or import backup configuration to InDTU