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NT-277

20107895848

 

 

 

 

 

 

 

 

 

Product: RS232/422/485 Fiber Optic Modem 

Model: NT-277 Series 

RS 232/485/422 Serial Port Fiber Optic Modem 

Overview

NT-277 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: RS232/485/422
  • Automatic detection of serial port rate, judgment and control of data transmission direction
  • Working wavelength: 850 nm (multi-mode); 1310 nm (single mode)
  • Maximum communication rate: 12500 Kbps
  • Optional optical interfaces: ST/SC/FC
  • Up to 2 kilometers in multi-mode transmission and up to 40 kilometers in single mode transmission
  • Broad voltage inputs: 5-40 VDC or 85-265 VAC
  • The interface supports 1500W surge protection and 15KV ESD protection
  • External power supply

Communication Indexes

Standard

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

RS-232 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

0-12500 Kbps

Fiber wavelength

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

Transmission distance of electrical interface

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

Transmission distance of optical interface

Multi-mode: 2 km; single mode: 40 km

Load capacity

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

Interface protection

600W surge protection, 1500V ESD protection

Form of electrical interface

8-pin connector

Form of optical interface

ST interface for multi-mode transmission and FC interface for single mode transmission

 

Environmental Indexes

Operating temperature

-25 to 70

Maintaining temperature

-40 to 85

Humidity

5%-95% RH

Power Indexes

Input power

12V input

Power consumption

2W

Appearance Indexes

Dimension

100mm*9mm*2mm

Enclosure

Iron enclosure

Color

Technology blue

Weight

230g

 

Order Information

 

 

NT-277M

RS-232/422/485 to multi-mode fiber  850 nm

NT-277S10

RS-232/422/485 to single mode fiber  1310 nm   10 km

NT-277S20

RS-232/422/485 to single mode fiber  1310 nm   20 km

 

 

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