MODEL277 Series

1-port RS-232/485/422 to Fiber Converter

 

 Support 1 RS-232, RS-485/422 or 3IN1 serial port to 1 fiber port


 Support advanced communication coding and clock recovery technology to ensure accurate transmission of distant data


 Support unique "Zero time delay and automatic forwarding" technology


 Support autotunning technology of serial baud rate


 Support 5VDC, 12-48VDC, -48VDC and 220VAC four power supply solutions

MODEL277 series are serial-to-fiber modems that convert RS-232/485/422 serial port signal to optical signal. This series include 3 types of optional products and support 1 RS-232, RS-485/422 or 3IN1 serial port to 1 fiber port. It adopts wall mounting or DIN-Rail mounting to meet the requirements of different application scenes.


This series adopt advanced communication coding and clock recovery technology to avoid data transmission error. And it adopts unique "Zero time delay and automatic forwarding" technology to enhance the anti-interference capability of interface and achieve real zero time delay. It can conduct automatic detection of baud rate, even the baud rate of the device serial signal changes; the converter can still achieve RS-232 or RS-485/422 to optical port conversion. MODEL277 series can be widely used in various industrial control, process control, traffic control, intelligent community and other scenes, especially suitable for bank, power industry, departments and systems with special requirements for electromagnetic interference.

 

 Fiber Port

 

Number of interfaces: 1

Interface form: optional SC/ST/FC port

Transmission distance:

Multimode: 2km

Single mode: 20/40/60/80/100/120Km


Transmission wavelength:

Multimode: 1310nm

Single mode: 1310nm or 1550nm

 

Serial Port

 

Standards: EIA RS-232C, RS-485, RS-422

Number of interfaces: Support 1 RS-232, RS-485/422 or 3IN1 serial port

RS-232 signals: OUT, IN, GND

RS-485 signals: D+, D-, GND

RS-422 signals: T+, T-, GND, R+, R-

Baud rate: 300bps-115200bps

MODEL277 interface form: RS-232/485/422 serial port, adopts 8-pin 5.08mm pitch terminal blocks

MODEL277A interface form: RS-232 serial port, DB9 female

MODEL277B interface form: RS-485/422 serial port, adopts 5-pin 5.08mm pitch terminal blocks

Direction control: RS-485 direction adopts ADDC (Automatic Data Direction Control) technology

Load capacity: RS-485/422 end supports 32 points polling environment (customizable 128 points)

Transmission distance: RS-232, 15m; RS-485/422, 1200m

RS-485 pull high/low resistor: 4.7kΩ

 

 

LED Indicator

 

Power supply indicator, fiber port data receiving and alarm indicator, fiber port data sending indicator

 

Power

Requirement

 

 

MODEL277

Input power supply: 12~48VDC

Connection mode: 2-pin 5.08mm pitch terminal blocks


MODEL277A, MODEL277B three optional power supply solutions

External power supply: 5VDC, adopts DC round head for connection, MODEL277B supports 2.0A overcurrent protection

Built-in power supply: -48VDC, adopts 3-pin 5.08mm pitch terminal blocks;

220VAC, adopts 3-hole AC socket with switch

 

Environmental

Limit

 

MODEL277:

Operating temperature: -40~75℃

Storage temperature: -40~75℃

Relative humidity: 5%~95% (no condensation)


MODEL277A, MODEL277B:

Operating temperature: -10~60℃

Storage temperature: -40~85℃

Relative humidity: 5%~95% (no condensation)

 

Physical

Characteristic

 

Housing: IP30 protection grade, metal shell

Installation: wall mounting or DIN-Rail mounting (DIN-Rail accessories should be purchased separately)

MODEL277 dimension (W×H×D): 100mm×69mm×22mm


MODEL277A, MODEL277B dimension (W×H×D):

External power supply: 94mm×70.6mm×26mm

Built-in power supply: 173.2mm×115mm×30mm

 

Certification

 

CE, FCC, RoHS

 

Warranty

 

3 years

 

 

Unit:mm 

 

Available Models Fiber Port RS-232 RS-485/422 RS-232/485/422 Power Supply Range
MODEL277 1 - - 1 12~48VDC
MODEL277A 1 1 - -

5VDC/-48VDC/220VAC

optional

MODEL277B 1 - 1 -