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Help CenterHalf Duplex Data RS485/RS232/TTL Radio Remote Control Transceiver
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Half-duplex Wireless Data Transceiver
SG-303
SG-303 wireless data transmission radio, is a long-distance wireless data transmission products.Its advantages of small size, metal shell, good shielding performance, strong anti interference, the internal use of integrated amplifier,TCXO reliability device and a built-in watchdog that ensure its good stability and high reliability. Half duplex communication working mode which is more convenient for the user to provide two-way data signal transmission and detection and control functions. The Send and receive time less than 50ms and timeliness. Suitable for wireless data acquisition, industrial control, the measurement and control of the oil field, watermark monitoring important industry.
Features:
1) Power and sensitivity:
Radio frequency output power is more than 5W,
high receiving sensitivity -120dbm (1200bps);
-117dbm(2400bps,
-105dbm(9600bps)
2). Multiple frequency,to meet various customers' needs
Carrier frequency can be 220-220 MHZ, 450-470 MHZ.
3) The transmission distance
4) High speed wireless communications and data buffer.
Air rate is greater than or equal to a serial port rate can continuous transmission infinite data, when the air rate is less than or equal to a serial port rate, temporary storage buffer then transfer.
5) transparent transmission, convenience for the user.
Radio after receiving the data needs to be sent, launch will start automatically without user to send and receive control.
6) Low power consumption
Receiving current < 60 mA, emission current < 1.5 A, hibernation current < 1 ma.
7) High reliability, small volume, light weight.
Aluminum alloy shielding enclosure, small size: 85 mm x 58 mm x 16 mm.
Connection:
The definitions and connection methods with terminals are shownas the following:
Interfaces definition:
|
name |
Description |
level |
remark |
1 |
GND |
GND |
5V |
|
2 |
A(TXD) |
RS-485 A or TXD of RS-232 |
|
|
3 |
B(RXD) |
RS-485 B or RXD of RS-232 |
|
|
4 |
NC |
|
|
|
5 |
DGND |
DGND |
|
|
6 |
RXD/TTL |
Data receive(TTL level) |
TTL |
|
7 |
TXD/TTL |
Data transmit(TTL level) |
TTL |
|
8 |
-- |
-- |
|
|
9 |
Test |
Internal test |
|
|
Specification:
Frequency: 230MHz/400MHz/420MHz/450MHz
Frequency stability: ±2.5ppm;
Working mode:Half-duplex
Channel spacing: 25 kHz;
Bit rate:1200/2400/4800/9600/19200bps (option)
Channel rate:1200/2400bps (option)
Transceiver conversion time:<50ms
Receiving sensibility: -117dBm(2400bps)
Working temperature:-40~+80℃; (industrial grade)
Working humidity:10% ~ 90% relative humidity, no condensation
Data format:8E1/8N1/801(other format also available,for example:9 data bits)
Power supply: DC12V(can also custom made according to your request).
Transmission distance: 12Km(matched with magnetic antenna in open air,1.5m length)
Dimension: 85x58x16mm (without radiator);
Receiver technical index:
Receiving sensibility: ≤0.25μV ( 12dB SINAD)
Adjacent channel selectivity: ≥70dB
Intermodulation suppression: ≥65dB
Spurious and image rejection: ≥70dB
Audio output power : 0.5W(8Ω,10% distortion)
Receive distortion:≤3%
Receiver current:≤ 50mA
Dimension:85x58x16mm
Transmitter technical index:
Transmit output power: 5W
Transmit current:<1.5A
Sleep current: <1mA
Clutter and images rejection: ≥70dB
Spurious Response: ≥70dB
Modulation frequency offset:≤3%
Modulation distortion:5mV
Modulation sensibility:≤300mA
Size: 85x58x16mm
Setting of frequency, interface, and data format
Before using SG-303, users can use our software to setting frequency value, interface rate and data format.
A. Users can program any frequency value in the frequency range. Before ordering, clients need confirm the frequency range.
B. Users can choose the interface rate according to requirement.
Users can change the data format individually.
Supported protocol and Transmit capability
SG-303 transceivers offer transparent protocol to support various applications and protocols of users. If the user needs to decrease his cost or ease the workload of terminal CPU, we can add other specific functions based on the transparent protocol, such as addressing, data acquisition, command interpretation and so on.
Description of Indicator light
a. The red and green lights will keep on about 50Ms when power suppy.
b. The red light is normally on when transmitting data, while the red light will crush out after ending the data.
c. The green light is normally on when receiving the air signal, while the green light will crush out after receiving the air signal.
Standard configuration:
One SG-303 DATA module;
One Power supply connector line;
One data connector line;
One 5.5dBi antenna.
1.As such high cost of goods,so normally ship them by DHL/UPS/FedEx Air express.
2.Door to Door service;
3.Be safety and fast.Appr. 3-5 working days then you will receive the package ;
4.Production time: within 5 working days for sample, 10-20 working days for wholesales.
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