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SST-2450 Wireless Modem User ’s Manual
Warranty
All products manufactured by ICP DAS are warranted against
defective materials for a period of one year from the date of delivery
to the original purchaser.
Warning
ICP DAS assumes no liability for damages consequent to the use of
this product. ICP DAS reserves the right to change this manual at
any time without notice. The information furnished by ICP DAS is
believed to be accurate and reliable. However, no responsibil
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Table of Contents 1. Introduction........................................................................................................... 3 2. Specifications........................................................................................................ 4 3. Product Description ............................................................................................... 5 3.1. Pin assignment ......................................................................................
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1. Introduction SST-2450EXT is a spread spectrum radio modem with controlling an RS-232/RS-485 interface port. It is designed for data acquisition and control applications between a host and remote sensors. It is also useful for those applications where the installation of cable wire is inconvenient. The SST-2450 can be used not only in peer-to-peer mode (refer to page 8), but also in a multi-point structure (refer to page 13). The SST-2450 is based on a direct sequence spread spectrum
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2. Specifications Frequency Range: 2.4GHz (2410.496MHz~2471.936MHz) Channel Spacing: 4.096MHz Output Power: 0.1W Transmit power : 19dBm 1dBm Modulation technique: GMSK Radio technique: Direct sequence spread spectrum Duplex Mode: TDD (for Full-duplex) Number of channels: 16 Number of PN codes: 16 PN code rate: 1.365 Mchips /sec. Interface: RS-232/RS-485 Communication range: Dependent upon the external antenna (the default is 300M) Maximum data transfer rate in asynchron
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3. Product Description 3.1. Pin assignment SST-2450 Radio Modem Frequency Range : 2410~2471MHz Channel Space : 4,096 Mhz Communication Range : 100-300M Interface :RS-232/RS-485 (RS-232) (RS-485) SST-2450 Wireless Modem User’s Manual Ver1.5, Feb /2003, OMH-030-10, ---5 20 SET 1 GND RX TX GND (Y)DATA+ (G)DATA- (R)+Vs (B)GND 10 11
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3.2. Block diagram Transceiver The SST-2450 wave signal cannot pass through metallic obstacles. So this product is not suitable for this type of metallic environment. The signal can pass thorough a cement wall, but will be weakened to half its efficiency for every 15cm of the wall’s thickness. SST-2450 Wireless Modem User’s Manual Ver1.5, Feb /2003, OMH-030-10, ---6
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4. Applications 4.1. Peer to Peer There are three types of peer to peer operational modes to choose from. The following table outlines the settings information and limitations. Mode Description: In this mode, the SST-2450 can accept and transmit any signal from the device. This mode works by using a sample and rebuild. The SST module samples the input signal then converts it into a wave signal technique before transmitting it to another SST module. When the other SST module receives
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4.1.1. PC to PC connections -- Using Mode 1 Full-Duplex Full-Duplex Asynchronous Asynchronous Master Slave Baudrate: 9600bps Max. Baudrate: 9600bps Max. SST-2450 Wireless Modem User’s Manual Ver1.5, Feb /2003, OMH-030-10, ---8
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4.1.2. Connecting a PC to the 7000 module – Using Mode 2 Full-Duplex Full-duplex Synchronous Synchronous Master Slave Baudrate: 57600bps Max. Baudrate: 57600bps Max. SST-2450 Wireless Modem User’s Manual Ver1.5, Feb /2003, OMH-030-10, ---9
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4.1.3. Connecting the 7188 Embedded Controller to the 7000 module – Using Mode 3 Both SST-2450 modules are setting as follows: Half-Duplex Synchronous Slave Baudrate: 57600bps Max. SST-2450 Wireless Modem User’s Manual Ver1.5, Feb /2003, OMH-030-10, ---10
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4.1.4. Connecting a PC to a PLC – Using Mode 3 Both SST-2450 modules settings are as follows: Half-Duplex Synchronous Slave Baudrate: 57600bps Max. SST-2450 Wireless Modem User’s Manual Ver1.5, Feb /2003, OMH-030-10, ---11
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4.1.5. Using the 7188 as a Bridge -- Using Mode 3 Both SST-2450 modules settings are as follows: Half-duplex Synchronous Slave Baudrate: 57600bps Max. SST-2450 Wireless Modem User’s Manual Ver1.5, Feb /2003, OMH-030-10, ---12
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4.2. Network communication 4.2.1. Application 1 All SST-2450 modules settings are as follows: Half-Duplex Synchronous Slave Baudrate: 57600bps Max. SST-2450 Wireless Modem User’s Manual Ver1.5, Feb /2003, OMH-030-10, ---13
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4.2.2. Application 2 All SST-2450 modules settings are as follows: Half-duplex Synchronous Slave Baudrate: 57600bps Max. Data Format: E,8,1 SST-2450 Wireless Modem User’s Manual Ver1.5, Feb /2003, OMH-030-10, ---14
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5. Quick Start instructions for the SST-2450 The SST-2450 is set by using a software utility. By using this tool, you are able to avoid disassembling the case. The utility not only provides a setting interface but also a testing interface. When you have finished making the settings, you can simply click a button to test the SST-2450 using the same software. 5.1. Installing the software Double clicks the Setup.exe file which is found in the Napdos\Wireless\Wireless Modem\SST-2450\Se
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The following screen will then be shown. 1. We recommend installing the software into the default directory. However, you may choose a different directory by clicking the “Change Directory” button and selecting the directory where you want to install the software. 2. Click the button to install the software. 3. Click “Exit Setup” to cancel the installation. Once the software has been installed, you will be able to find the executable file in StartèApplication fileèSST-2450 Setti
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5.2. SST-2450 Settings When setting the SST-2450, you should first use a wire to connect the SET and GND pins. Quickly power off and power on the SST-2450, then launch the setting software program. There are only 3 steps required to make your settings. 1. Open a Serial Port. 2. Setting the operating mode. 3. Exit the program. When setting the operating mode, please refer to the following steps: When you set the SST-2450, you should never use the following settings: SST-2450
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1. Select a COM port from which your SST-2450 is connected to the PC. In the setting mode, the baud rate must be set at 9600bps and the Line control values must be N, 8,1. Click the “Open” button to open a connection to the device then click the “Setting SST-2400” button to continue. 1 3 2 2. The following screen will appear. From the options shown in the Interface & Mode status panel, choose a suitable operational mode for your system. After making your selections, click the “S
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5.3. Testing the SST-2450 This tool is for testing the transmissions between two PCs using the SST-2450. Please note that before you use this function, you must make sure that you have removed the wire that you used to connect the SET and GND pins. The testing method is as follows: 1. Launch two copies of the SST-2450 setting tools, 2. Click the “Testing SST-2450” button on each and the following screens will appear. 3. Attempt to send data to each port in the following manner: n In
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6. Troubleshooting Setting error If you are attempting to set your SST-2450 using the software, but are unable to access the setting tool, the following screen will appear. Follow the steps shown on the error screen. Testing error If you are attempting to test your SST-2450 using the software, but are unable to access the testing tool, the following screen will appear. Follow the steps shown on the error screen. SST-2450 Wireless Modem User’s Manual Ver1.5, Feb /2003, OMH-030-10,
