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China WD889/WD250 Multi-Channel FM Transceiver & Wireless Modem from Reliable Suppliers and Factory
WD889: 25W Size: (L x W x H) 137x135x44mm
WD250: 20W Size: (L x W x H) 124.7x76x34mm
MD1200 MODEM
Data transmission mode:
Transparent
Modulation mode:
FSK (f1=1.3KHz f2=2.1KHz)
Transmission rate:
75-1200bps self-adaption
BER:
10-7 (S/N=20dB)
Communication interface:
RS232/RS485/TTL
Temperature:
-40℃～+70℃
Voltage:
DC+7～+15V or +5V
Current:
RS232: <30mA; RS485: <60mA
Installation size:
59.5x39.3mm
Adapter model:
250A/WD889/WD886 etc.
MD4800 MODEM
Data transmission mode:
Transparent/Intelligent
Modulation mode:
FFSK
Wireless transmission rate:
1200/2400/4800bps
Interface transmission rate:
1200/2400/4800/9600bps
Address code/Data format:
Programmable setting
BER:
10-7 (S/N=20dB)
Communication interface:
RS232/RS485/TTL
Temperature:
-40℃～+70℃
Voltage:
DC+7～+15V or +5V
Current:
RS232: <30mA; RS485: <60mA
Installation size:
59.5x39.3mm
Adapter model:
250A/WD889/WD886 etc.
MD19200 MODEM
Data transmission mode:
Transparent/Intelligent
Modulation mode:
GMSK/CPFSK
Wireless transmission rate:
9600/19200bps
Interface transmission rate:
1200/2400/4800/9600/19200bps
Address code/Data format:
Programmable setting
BER:
10-7 (S/N=20dB)
Communication interface:
RS232/RS485/TTL
Temperature:
-40℃～+70℃
Voltage:
DC+7～+15V
Current:
<40mA
Size (L x W):
60x50mm
Adapter model:
250A/889/886/250G/258G etc.
MD38400 MODEM
Data transmission mode:
Transparent/Intelligent
Modulation mode:
GMSK/CPFSK
Wireless transmission rate:
38400bps
Interface transmission rate:
38400bps
Address code/Data format:
Programmable setting
BER:
10-7 (S/N=20dB)
Communication interface:
RS232/RS485/TTL
Temperature:
-40℃～+70℃
Voltage:
DC+7～+15V
Current:
<40mA
Size (L x W):
60x50mm
Adapter model:
250A/889/886/250G/258G etc.
Frequently Asked Questions
What communication interfaces do these modems support?
All standard models listed here, including the MD1200, MD4800, MD19200, and MD38400, support RS232, RS485, and TTL communication interfaces.
What is the operating temperature range for these devices?
These industrial-grade modems are designed to operate reliably in harsh environments, supporting a wide temperature range of -40℃ to +70℃.
Which power adapters are compatible with these modems?
Compatible adapter models include the WD889, WD250 (250A), WD886, WD250G, and WD258G, depending on the specific modem model.
What is the data transmission mode difference between MD1200 and MD4800?
The MD1200 operates exclusively in Transparent data transmission mode, whereas the MD4800 supports both Transparent and Intelligent modes.
How reliable is the wireless signal transmission on these modems?
All models feature a very low Bit Error Rate (BER) of 10-7 at a Signal-to-Noise Ratio (S/N) of 20dB, ensuring high accuracy and data integrity.