Low speed data fiber modem

Overview

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.

Features

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

Specifications

Parameter	Specifications
Standard	In compliance with EIA RS-232 and RS-485 standards
RS232 signal	IN ,OUT,GND
RS-485 signal	D+,D-,GND
RS-422 signal	R+,R-,T+,T-,GND
Fiber Signal	IN,OUT
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	FC
Dimension	69mm(W)*100mm(D)*22mm(H)
Operating temperature	-25℃ to 70℃
Maintaining temperature	-40℃ to 85℃
Humidity	5%-95%RH
Input power	12V input
Power Consumption	2W

Application

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