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Data Connect CM 900
Data Connect Cellular Data Modem

Wireless cell dial modem access solution for OEM
(looks and feels like a standard RS 232 AT command compatible unit)
This is the ideal solution for integrating into your product or system.

This low cost combination of a modem & cell phone transceiver is ideal for those " remote remote" sites where a phone line is impossible. With the cost cellular service declining a cellular modem makes sense for gas and electric meters.

Data Connect Cellular Data Modem CM 900 Features

  • Uses AMPS cellular network for data transmission
  • User friendly modem AT command set
  • Standard RS 232 serial interface

        Sample Application Areas

  • Packet Data Radio
  • SCADA and Telemetry Systems
  • Remote gas/water/electric meter readings.
  • Factory Automation systems
  • Vending Machines

Data Connect Cellular Data Modem CM 900 Specifications

  • Air Speed                                                                 up-to 9600 bps
  • DTE Rate  (switch selectable)                                300, 1200, 2400, 4800, 9600,  
                                                                                       (14.4, 19.2, 57.6Kbps with compression turned on)
                                                                                      Auto Detection on receive
  • Data Compression & Error Detection                  MNP2-5, V42, V42bis, MNP 10 
                                                                                      MNP10-EC is supported
  • RF Power Output                                                    0.6 watts 
  • Power Supply                                                          5VDC Volts DC @ 800 ma avg. 1 amp max at turn on
  • Optional 3 watt output                                           Available soon
  • Interface                                                                   RS 232 Asynchronous
  • Signals supported                                                  TXD, RXD, CD, DSR, RTS, CTS
  • Operating Temperature Range                            -20 to 70 deg C 
  • Size                                                                         2.5' wide by 6" L by 1"H (hole to hole 5.5")  
                                                                                     (    no components on the bottom side of the bottom board)
  • Optional high-gain Antenna                                 4 dbm Omni-Directional  - 6 to 9 dbm Yagi
  • Optional  DIN rail mounting                                 Optional
  • Custom Configurations and Options

Your package includes:

  • CM 900 modem Board
  • CRM 4100 Radio
  • Manual

Size:

  • 4 7/8" mid hole to mid hole 5 1/2" end to end
  • 3" from outside data connector to outside of power connector
  • 1" thick - no components on the bottom side of the bottom board

 

Optional: CM 900 without Radio unit - for use with external cell phone

What you need to provide:
  • 5 Volts, 1.5 Amp DC Regulated DC Power Supply
  • Host PC with terminal program like Hyper terminal, Procomm etc
  • MIN, SID information (From your cellular service provider)

Installation:

The CM900 is configured as a DCE (e.g. modem). It talks to a PC through the RS 232 cable.                                                                                                                 

  1. Remove the screws from the top of the spacers
  2. Mount the CRM 4100 radio to fit into the 20 pin female header
  3. Connect the screws on the spacers
  4. Connect the power supply. Please take caution in making sure that the voltage with correct polarity only is applied. The LED should be on and current less than 500 ma.
  5. Connect the RS 232 cable provided. Connect the Antenna.
  6. The unit is ready for operation.

First Time Quick Start

For a typical session, the following may help.

Connect the CM900 (with the CRM 4100 radio) to the PC. Configure the serial port to 9600 bps, 8N1 and Hardware Handshaking.

Power up the unit.

Allow 10 seconds for calibration.

Enter <CR>. This allows the unit to auto-baud to match the speed of the PC.

The CM 900 will respond OK. This exercise must be repeated every-time on power up.

We are now ready to configure the radio.

1)    Enter AT+TEST<CR>. The unit will respond OK.

2)    Enter AT+MIN=< the MIN allocated><enter> The unit will respond OK.

3)    Enter AT+SID=< the SID allocated><enter> The unit will respond OK

4)    AT+SYS=02 <CR> The system is set for normal mode.

The radio is now configured and ready for operation.

Please note that radio does NOT have to configured every-time. The above information is stored in the Radio’s non-volatile memory.

Operation:

The CM900 (hereafter referred to as the modem) is always in one of the two states: the command state or the on-line state. The modem assumes the Command State when power is applied. This state allows the modem to be configured for the particular application. In the Command State, all inputs from the PC are treated as commands . The modem may be set to the on-line state in which all inputs form the PC are treated as data to be shipped over the airwaves and all inputs from the airwaves is treated as received data from the remote end.


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3405 Olandwood Court
Olney, Maryland 20832