Detailed features:

Wireless Modem Module RS-232/RS-485 Interface

Introduction
SST-900EXT is a spread spectrum radio modem with RS-232/RS-485 interface port. It is designed for data acquisition and control application between host and remote sensors. It is also useful for those application, the cable wire is inconvenient to be installed. Please refer to the right hand side hardware configuration .

Application

Remote Data acquisition

Factory automation

Building automation

Remote security system

Remote Display system

Features

Half-duplex up to 57600bps

Auto band -rate setting

ISM band

Full-duplex or half-duplex

Spread Spectrum technology

Specifications

Frequency Range :
902-928 MHz (SST-900EXT)

Channel Spacing : 2MHz

Transmit power : 20 +/- 2dBm

Modulation technique : GMSK

Radio technique : direct sequence spread spectrum

Duplex Mode: TDD ( for Full-duplex)

Number of channel : 8

PN code rate : 1.365 Mchips /sec.

Communication distance: Depend on external antenna, default is 300M

Maximum data transfer rate in asynchronous mode:
Full-duplex mode : 9.6Kbps
half-duplex mode : 28.2K

Maximum data transfer rate in synchronous mode:
Full-duplex mode : 19.2Kbps
half-duplex mode : 57.6K

Data bit error rate

Antenna : < 1/1000@ -102dBm

Input voltage : 10~30Vdc

Input current : Typical then 250mA

Size : 106mm (L) x 76mm(W)x31mm(H)

Weight : 200g

Operating temperature : 0~50C

Operating humility : 0~90%