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Serial Optical Fiber Modem

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Industrial Rail Type 1-4 channel RS232/422/485 (providing 3 type interface) Fiber Modem

Overview
This series of devices is industrial rail typeuse FPGA design providing 4-channel serial port each port supports RS232/422/485 three business interfaces. The device is the best choice of connecting a remote terminal unit (RTU) to a host (HOST) or a distributed data acquisition system (SCADA) controller with high cost performance. Effective transmission distance up to 0-120KM serial port communication speed up to 0-115.2KBPS.
Adopting optical fiber as transmission medium it can completely avoid the threats from harsh environments like lightning surges electromagnetic interference to communications equipment and it also eliminates the cost of lighting surge protection devices for using copper as transmission medium. 
Features
◆ Provide 4-channel serial port each serial port also provides three serial ports RS232/422/485 (interface type can be set by DIP switch) to start the service on-site conveniently;
◆ It can detect control RS-485 data flow automatically no need handshake signal to control data flow;
◆ With the ability to detect serial signal baud rate automatically;
◆ When there is no optic signal. it can detect automatically the opposite end device is powered off or the fiber is disconnected and indicates on the LED;
◆ Rack type device provide network management SNMP;
◆ Serial channel can transmit asynchronous baud rate from 300-115.2Kbps adaptive serial data;
◆ Serial interface lightning protection to IEC61000-4-5 (10/700μS). Differential mode: 6KV impedance (2Ω); Common mode: 6KV impedance (2Ω);
◆ Support a wide range of 9-55V AC and DC power input;
◆ Support internal isolation redundant dual power input;
◆ Power supply support overload protection anti-reverse protection;
◆ Meet the industrial four electromagnetic compatibility requirements;
◆ Super lightning protection function: lightning protection anti-induced high voltage anti-surge and so on;
◆ Fanless efficient cooling reduce repair time;
◆ Anodized aluminum housing IP40 degree of protection able to withstand the harsh environment test;
◆ Rail or wall-mounted;
◆ Wide temperature type: Operating temperature -40 ℃ ~ +85 ℃;
◆ All models are 100% baked machine test the warranty period: 5 years.
Parameters
Fiber          
Number of Fiber Ports:1
Fiber core :Single fiber/dual fiber
Connector:FC/SC/ST/LC(SFP)
Wavelength:850nm/1310nm multi mode;1310nm/1550nm single mode
Transmission distance:20~120Km
Typical output power:
Single mode 1310/1550nm: >-9dBm
Multi-mode 850nm:-18dBm
Multi-mode 1310nm:-25dBm
Receiver Sensitivity: -28dBm~- 40dBm
Serial port        
Standard: 
EIA/TIA-232 RS-232 (ITU-T V.28)
 EIA/TIA-422 RS-422 (ITU-T V.11)
 EIA/TIA-485 RS-485 (ISO/IEC8284)
Serial interface:
RS-422: TxD+ TxD- RxD+ RxD- 
RS-485 4 wires: TxD+ TxD- RxD+ RxD- 
RS-485 2 wires: A(TX+) B(TX-) Signal Ground
RS-232: RXD TXD Signal Ground
Electrical and mechanical feature         
Redundant dual power input:
 DC9-48V power consumption <5W
Overload protection: support
Reverse connection protection: support
Redundant protection: support
Access terminal: 4*5.08mm pitch plug-in terminal
Shell: IP40 protection grade aluminum alloy
Installation: rail installation wall-mounted installation
Weight: 0.75kg / PCS
Size: 133mm (L) x 120mm (W) x 50.0mm (H)
Working environment  
Operating temperature: -40 ℃ - +85 ℃
Storage temperature: -40 ℃ - +85 ℃
Humidity: 0% -95% (non-condensing)
MTBF:> 100000 hours
Application
Industrial Rail Type 1-4 channel RS232/422/485 (providing 3 type interface) Fiber Modem
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