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Shenzhen N-net High-Tech Co.,Ltd


Home > Products > Fiber Optic Modem > RS485/RS422/RS232 To Fiber Converter > Low speed data fiber modem

Low speed data fiber modem

Low speed data fiber modem

Payment Type: L/C,Paypal,Western Union
Incoterm: FOB,EXW
Min. Order: 1 Piece/Pieces
Delivery Time: 4 Days

Basic Info

    Model No.: NT-S277

    Communication Mode: Full-Duplex & Half-Duplex

    Type: Optical Switch

    Transmission Rate: Other

    Ports: Other

    69mm(W)*100mm(D)*22mm(H): Serial To Fiber

Additional Info

    Packaging: carton

    Productivity: 50000

    Brand: N-net

    Transportation: Ocean,Land,Air,express

    Place of Origin: China

    Supply Ability: 50000

    Certificate: CE,FCC,ISO9001

    HS Code: 8517622990

    Port: Shenzhen,Yantian

Product Description


Fiber Optic Modem is a network terminal used for converting optical signals to electrical signals. It has the characteristics of large communication bandwidth and fast network speed.

NT-S277 is a type of RS-232/RS-485/RS-422 serial port fiber optic modem. It adopts industrial standard design and its wall type outface design supports DIN-rail standard lead rail installation, featuring easy installation. Presently many users make use of RS-232/RS-485/RS-422 serial port fiber optic modem to solve the electromagnetic interference in engineers and to extend the RS-232/RS-485/RS-422 serial port transmission distance to several or even tens of kilometers.NT-277 can provide users with RS-232/RS-485/RS-422 serial port end-to-end transparent transmission. Since signals are transmitted over fibers and these optical signals are free of electrical conductivity, they have strong anti-interference capacity and are immune to high-voltage power or thunders.


Zero-Delay automatic forwarding

Supporting three types of interfaces:RS-232/485/422

Automatic detection of serial port rate judgment and control of data transmission direction

Working wavelength:850nm(multi-mode):1310nm(single mode)

Maximum communication rate:500kbps

Optional optical interfaces: SC/ST/FC

Up to 2 kilometers in multi-mode transmission and up to 40 kilometers in single mode transmission

Broad voltage inputs:5~40V DC or 85~265VAC

The interface supports 1500W surge protection and 15KV ESD protection

External power supply





In compliance with EIA RS-232 and RS-485 standards

RS232 signal


RS-485 signal


RS-422 signal


Fiber Signal


Working mode

Asynchronous working mode, point-to-point

Direction control

Adopting automatic data flow control technology, supporting automatic judgment and control of data transmission direction

Baud rate

0-500Kbps,automatic detection of signal rate

Fiber wavelength

Multi-mode:850nm;single mode:1310nm

Transmission distance of electrical interface

RS-232 interface:15 meters:RS-485/422 interface:1200 meters

Transmission distance of optical interface

Multi-mode:2KM; single mode:20KM

Load capacity

RS-485/422 interface supports 32 nodes(128 nodes customizable

Interface protection

600W surge protection,1500V ESD protection

Data interface

8-pin connector or DB9

Optical interface




Operating temperature

-25℃ to 70℃

Maintaining temperature

-40℃ to 85℃



Input power

12V input

Power Consumption




Looking for ideal Low Speed Data Fiber Modem Manufacturer & supplier ? We have a wide selection at great prices to help you get creative. All the Data to Fiber Modem are quality guaranteed. We are China Origin Factory of Low Speed Modem. If you have any question, please feel free to contact us.

Product Categories : Fiber Optic Modem > RS485/RS422/RS232 To Fiber Converter

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Dolly Xu

Ms. Dolly Xu



Mobile Phone:+8615914068691Contact me with Whatsapp

Address:5-6 floor, C Building, Yiyuantong Industrial Zone,Xuexiang Community, Bantian, Longgang District, Shenzhen, Guangdong