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China WD889/WD250 Multi Channel FM Transceiver & Wireless Modem | Reliable Suppliers & Factory Direct Solutions
WD889 Transceiver
⚡ Power: 25W
📐 Size: 137 x 135 x 44 mm (L x W x H)
WD250 Transceiver
⚡ Power: 20W
📐 Size: 124.7 x 76 x 34 mm (L x W x H)
Industrial Data MODEM Series
MD1200 MODEM
Transmission Mode:Transparent
Modulation Mode:FSK (f1=1.3KHz f2=2.1KHz)
Transmission Rate:75-1200bps self-adaption
BER:10-7 (S/N=20dB)
Interface:RS232 / RS485 / TTL
Temperature:-40℃ ～ +70℃
Voltage:DC+7 ～ +15V or +5V
Current:RS232: <30mA; RS485: <60mA
Installation Size:59.5 x 39.3 mm
Adapter Model:250A / WD889 / WD886 etc.
MD4800 MODEM
Transmission Mode:Transparent / Intelligent
Modulation Mode:FFSK
Wireless Rate:1200 / 2400 / 4800 bps
Interface Rate:1200 / 2400 / 4800 / 9600 bps
Address / Data Format:Programmable setting
BER:10-7 (S/N=20dB)
Interface:RS232 / RS485 / TTL
Temperature:-40℃ ～ +70℃
Voltage:DC+7 ～ +15V or +5V
Current:RS232: <30mA; RS485: <60mA
Installation Size:59.5 x 39.3 mm
Adapter Model:250A / WD889 / WD886 etc.
MD19200 MODEM
Transmission Mode:Transparent / Intelligent
Modulation Mode:GMSK / CPFSK
Wireless Rate:9600 / 19200 bps
Interface Rate:1200 / 2400 / 4800 / 9600 / 19200 bps
Address / Data Format:Programmable setting
BER:10-7 (S/N=20dB)
Interface:RS232 / RS485 / TTL
Temperature:-40℃ ～ +70℃
Voltage:DC+7 ～ +15V
Current:<40mA
Size (L x W):60 x 50 mm
Adapter Model:250A / 889 / 886 / 250G / 258G etc.
MD38400 MODEM
Transmission Mode:Transparent / Intelligent
Modulation Mode:GMSK / CPFSK
Wireless Rate:38400 bps
Interface Rate:38400 bps
Address / Data Format:Programmable setting
BER:10-7 (S/N=20dB)
Interface:RS232 / RS485 / TTL
Temperature:-40℃ ～ +70℃
Voltage:DC+7 ～ +15V
Current:<40mA
Size (L x W):60 x 50 mm
Adapter Model:250A / 889 / 886 / 250G / 258G etc.
Frequently Asked Questions (FAQ)
What communication interfaces are supported by the MD series MODEMs?
All MD series modems (MD1200, MD4800, MD19200, MD38400) support RS232, RS485, and TTL serial communication interfaces for industrial integration.
What are the differences in transmission rates and modulations across the modules?
MD1200 utilizes FSK modulation supporting 75-1200bps. MD4800 utilizes FFSK modulation with rates up to 4800bps wireless / 9600bps interface. MD19200 supports GMSK/CPFSK up to 19200bps, while MD38400 provides high-speed throughput up to 38400bps with GMSK/CPFSK modulation.
What operating temperature range can these devices withstand?
All models are engineered for industrial environments and operate reliably in a wide temperature range of -40℃ to +70℃.
Which radio models are compatible with these MODEM modules?
The MD1200 and MD4800 adapt to models such as 250A, WD889, and WD886. The MD19200 and MD38400 provide broader adapter support including 250A, 889, 886, 250G, 258G, and compatible units.
What data transmission modes do the MODEMs support?
The MD1200 operates in Transparent mode, while MD4800, MD19200, and MD38400 support both Transparent and Intelligent data transmission modes with programmable address code and data format settings.