Detailed Product Description

The Model277/B Series converter is equipped with a multiple interface circuit that can handle RS-422/485 serial interfaces andmulti-mode or single- mode fiber. Model277/B converters are used to extend serial transmission distance up to 2 km (multi-mode fiber) or up to 20, 40, 60km (single- mode fiber). Note that the RS-422/485 interfaces cannot be used on the same Model277/B at the same time to convert to fiber.Auto Baud Rate Detection
The Model277/B Series incorporates a method for automatically detecting the serial signal baud rate by hardware. This is an extremely convenient feature for the user. Even if a devices baud rate is changed, the signal will still be transmitted through the RS-422/485 to fiber converter without any problem.
Features
1.Auto sense serial signal rate, zero delay automatic transmit
2.Adopt automatic send data control, auto distinguish and control data transfer direction
3.0-120Kbps the highest rate
4.Supply two interface (RS485/422)
5.Multi-mode 2KM, signal-mode 20KM, 40KM, 60KM
Communication

Standard	Accord RS-485, RS-422 standard
RS-485 signal	D+, D-, GND
RS-422 signal	R+, R-, T+, T-, GND
Fiber signal	IN, OUT
Working format	Asynchronism, point to point or multi-point
Direction control	Adopt automatic send data control , auto distinguish and control data transfer direction
Band rate	0-120Kbps, auto serial band rate test
Fiber wavelength	Multi-mode 850nm, signal-mode 1310nm
Electricity port transmission	RS-485/422 port 1200M
Optic port transmission	Multi-mode 2KM, signal-mode 20, 40, 60KM
Loading	RS-485/422 port Support 32 port loop enviroment(or handtailor 128 point)
Interface protection	600W surge protection, 15KV static protection
Electricity connector	5 terminal block
Optic port connevtor	Multi-mode adopt ST/SC connector, signal-mode adopt FC/ST/SC connector

Environment

Working temperature	-25 to 70
Storage temperature	-40 to 85
Humidity	Relative humidity 5% to 95%

Power

Input power	5-40VAC
Consumption	2W

Dimension

L*W*H	100mm*69mm*22mm
Shell	Iron
Color	White
Weight	230g