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Help Center2W TTL RS232 RS485 Wireless Radio Modem 420MHZ-480Mhz Uhf Vhf Transmitter Module 3KM-5KM Range Radio Data Communication
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Specifications:
1 Features:
l Max. 2W Lower Power Emission
l High receiving sensitivity up to -123dBm/1200bps
l 3km-5km line of sight long transmission distance
l About 80g light weight
l With RS232&RS485 2 interface, TTL customized
l 0-16 Channels(DIP switch select and PC programming)
2 Pin Definitions
Pins |
Definition |
Description |
Level |
Terminal Connection |
1 |
VCC |
DC 5V |
Positive power supply 8-36V can be set in factory |
|
2 |
Rxd/RS232 |
Data Input |
RS232 Level |
Txd/RS232 |
3 |
Txd/RS232 |
Data Output |
RS232 Level |
Rxd/RS232 |
4 |
GND |
Ground of power supply |
Negative power supply |
|
5 |
SGND |
Signal |
SGND |
Signal |
6 |
A/RS485 |
RS485 Signal+ |
RS485 Level |
A/RS485 |
7 |
B/RS485 |
RS485 Signal- |
RS485 Level |
B/RS485 |
8 |
NC |
NC |
||
9 |
NC |
NC |
||
3 Working Frequency
The DIP switch can select 0~16 channels, and frequency point of 1~15 channels is fixed, and the frequency of the 0 channel can be set and saved arbitrarily through our software. Dial switch to "ON", means "1", dial "OFF" means "0", "1 is high" and "4" is "low.
Channel (1234) |
Frequency(MHz) |
Channel (1234) |
Frequency(MHz) |
0(0000) |
453.25000 |
8(1000) |
449.75000 |
1(0001) |
425.25000 |
9(1001) |
456.75000 |
2(0010) |
428.75000 |
10(1010) |
460.25000 |
3(0011) |
432.25000 |
11(1011) |
463.75000 |
4(0100) |
435.75000 |
12(1100) |
467.25000 |
5(0101) |
439.25000 |
13(1101) |
470.75000 |
6(0110) |
442.75000 |
14(1110) |
474.25000 |
7(0111) |
446.25000 |
15(1111) |
477.75000 |
4 Software Function Setting
4.1 Enter setup mode
Continues to send 3 + numbers at current baud rate, XZ-DT254 enters setup mode, and the serial port outputs OK at this time
Format + + +
Return OK
4.2 Set Channel 0 Frequency
Format >WF0/RX:453.25000/TX: 453.25000
Return
Explain >WF0 means working frequency when writing channel 0
RX: means receiving frequency453.25000 MHz ,please notice frequency needs to be accurate to 5 digits after the decimal point；
TX: means transmitting frequency 453.25000 MHz , please notice frequency needs to be accurate to 5 digits after the decimal point；
XZ-DT254 receiving and transmitting frequency range：420 ~ 480MHz, the same XZ-DT254 receiving and transmitting frequency settings can be the same or different, but modules in the same communication system must have the same receiving and transmitting frequency then they can communicate.
4.3 Baud Rate Setting
Format >WBA
Return <1200>
<8n1>
<1200>
<8n1>
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