RS-232/485/422 serial optic fiber modem

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The Model277 Series converter is equipped with a multiple interface circuit that can handle RS-232, or RS-422/485 serial interfaces andmulti-mode or single- mode fiber. Model277 converters are used to extend serial transmission distance up to 2 km (multi-mode fiber) or up to 20 km (single- mode fiber). Note that the RS-232 and RS-422/485 interfaces cannot be used on the same Model277 at the same time to convert to fiber.Auto Baud Rate Detection
The Model277 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 adevice's baud rate is changed, the signal will still be transmitted through the RS-232 or RS-422/485 to fiber converter without any problem.
Features
1.Auto sense serial signal rate, zero delay automatic transmit
2.500Kbps the highest rate
3.Supply three interface (RS232/485/422)
4.Multi-mode 2KM, signal-mode 20KM
Communication
Standard Accord EIA RS-232, RS-485, RS-422 standard
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 format Asynchronism, point to point or multi-point
Direction control Adopt automatic send data control , auto distinguish and control data transfer direction
Band rate 0-500Kbps, auto-sense signal serial baud rate
Fiber wavelength Multi-mode 850nm, signal-mode 1310nm
Electricity port transmission RS-232 port 15M, RS-485/422 port 1200M
Optic port transmission Multi-mode 2KM, signal-mode 20KM
Loading RS-485/422 port Support 32 port loop enviroment(or handtailor 128 point)
Interface protection 600W surge protection, 15KV static protection
Electricity connector 8 terminal block
Optic port connector 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%