ICP DAS USA SST-2450 Bedienungsanleitung

SST-2450 Wireless Modem User’s Manual Ver1.5,Feb /2003, OMH-030-10, ---1

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 assumesno 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 responsibility is

assumed by ICP DAS for its use, or for any infringements of patents

or other rights of third parties resulting from its use.

Trademark

The names used for identification only may be registered

trademarks of their respective companies.

SST-2450 Wireless Modem User’s Manual Ver1.5,Feb /2003, OMH-030-10, ---2

Table of Contents

1. Introduction...........................................................................................................3

2. Specifications........................................................................................................4

3. Product Description...............................................................................................5

3.1. Pin assignment ........................................................................................5

3.2. Block diagram..........................................................................................6

4. Applications..........................................................................................................7

4.1. Peer to Peer............................................................................................7

4.1.1. PC to PC connections -- Using Mode 1.......................................8

4.1.2. Connecting a PC to the 7000 module –Using Mode 2.................9

4.1.3. 7188 Embedded Controller to 7000 module –Using Mode 3...... 10

4.1.4. Connecting a PC to a PLC –Using Mode 3................................11

4.1.5. Using the 7188 as a Bridge -- Using Mode 3..............................12

4.2. Network communication.........................................................................13

4.2.1. Application 1...........................................................................13

4.2.2. Application 2...........................................................................14

5. Quick Start instructions for the SST-2450...............................................................15

5.1. Installing the software............................................................................15

5.2. SST-2450 Setting ..................................................................................17

5.3. Testing the SST-2450.............................................................................19

6. Troubleshooting...................................................................................................20

7. Dimensions.........................................................................................................21

8. Din-rail Mounting.................................................................................................22

9. External Antenna.................................................................................................23

9.1. ANT-3 (Directional).................................................................................23

9.2. ANT-8(Omni directional)........................................................................24

9.3. ANT-12P (Directional)............................................................................25

10. Appendix ..……………………………………………………………………………………26

SST-2450 Wireless Modem User’s Manual Ver1.5,Feb /2003, OMH-030-10, ---3

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

applicationsbetween 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 and RF

technology, operating In the ISM bands with a Frequency Range of

2410.496MHz~2471.936MHz. The Channel Spacing is 4.096MHz.

The SST-2450 is similar to the SST-2400, with the major difference being

the setting control method. The SST-2400 is set using jumpers, whereas the

SST-2450 is set using a software utility. The older SST-2400 can work in

conjunction with the new SST-2450 by changing itsinternal 8051 chip. The

new chip includes updated firmware, so please contact us and we will send a

new chip. Refer to page 26 for detail.

SST-2450 Wireless Modem User’s Manual Ver1.5,Feb /2003, OMH-030-10, ---4

2. Specifications

Frequency Range: 2.4GHz (2410.496MHz~2471.936MHz)

Channel Spacing: 4.096MHz

Output Power: 0.1W

Transmit power : 19dBm土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 asynchronous mode:

Full-duplex mode: 9.6Kbps; Half-duplex mode: 28.2Kbps

Maximum data transfer rate in synchronous mode:

Full-duplex mode: 19.2Kbps;Half-duplex mode: 57.6Kbps

Setting Method: Software utility

Antenna type: Flexible

Data Format: N, 8,1 or E, 8,1dependent upon the software setting

Data bit error rateèAFTER DSST PROCESSING:

BER of RF Module：< 1/1000 @ -90 土2dBm

Processing Gain：~12dB

Input voltage: 10~30V DC

Input current: 250mA (Typical)

Power Consumption: 1.5W

Size: 121.5mm (L) x 72mm (W) x 33mm (H)

Weight: 200g

Operating temperature range:0~50C

Operating humidity range:0~90%

SST-2450 can work together with SST-2400 (however the 8051 chip in

the SST-2400 must be changed).

SST-2450 Wireless Modem User’s Manual Ver1.5,Feb /2003, OMH-030-10, ---5

3. Product Description

3.1. Pin assignment

Radio Modem

Frequency Range : 2410~2471MHz

Channel Space : 4,096 Mhz

Communication Range : 100-300M

Interface :RS-232/RS-485

SST-2450

SET

GND

(Y)DATA+

(G)DATA-

(R)+Vs

(B)GND

(RS-232) (RS-485)

SST-2450 Wireless Modem User’s Manual Ver1.5,Feb /2003, OMH-030-10, ---6

3.2. Block diagram

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.

Transceiver

SST-2450 Wireless Modem User’s Manual Ver1.5,Feb /2003, OMH-030-10, ---7

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

the wave signal, it transforms the signal back into the original format. The

sample rate used is 32kb per second, so the device can’t accept higher

speed signals. The maximum signal speed is less than9600 bps. Any data

format may be need in this mode.

Setting Limitative: Baud Rate must be 9600bps or below; Full-duplex;

Asynchronous; One SST-2450 is the Master the other is the Slave.

This mode simulates the Full-duplex mode. The device can transmit and

receive signals at the same frequency. The RF processor uses the timer

controller to simulate Full-duplex. Initially, the module that has been set as

the master is in transmission mode. After 4ms, it switches to receive mode.

The slave module is inverse to thus. For example if the master is in

transmission mode but a signal need to be transmitted by the slave at the

same time; the slave will store the signal in it’s buffer and will transmit once

the master is in the receive mode. In Mode 2, the RF signal will be

processed by the 8051 CPU so requires the fixed data format to be either N,

8,1 or E, 8,1.

Setting Limitative: Full-duplex;Synchronous; One SST-2450 is the Master

and the other is the Slave.

This mode simulates the Half-duplex mode. One device will respond when it

receive a command from another device. This is the only mode which

supports a SST-2450 network (refer to page 13). This mode is also requires

a fixed data format to be either N, 8,1 or E, 8,1.

Setting Limitative: Half-duplex; Synchronous; Both SST-2450s are slaves.

Refer to chapter 5 for further setting argument information.

SST-2450 Wireless Modem User’s Manual Ver1.5,Feb /2003, OMH-030-10, ---8

4.1.1. PC to PC connections -- Using Mode 1

Full-Duplex

Asynchronous

Master

Baudrate: 9600bps Max.

Full-Duplex

Asynchronous

Slave

Baudrate: 9600bps Max.

SST-2450 Wireless Modem User’s Manual Ver1.5,Feb /2003, OMH-030-10, ---9

4.1.2. Connecting a PC to the 7000 module –

Using Mode 2

Full-Duplex

Synchronous

Master

Baudrate: 57600bps Max.

Full-duplex

Synchronous

Slave

Baudrate: 57600bps Max.

SST-2450 Wireless Modem User’s Manual Ver1.5,Feb /2003, OMH-030-10, ---10

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.

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