RS485/422 serial device to optic fiber converter, auto baud rate detection, zero delay automatic transmit The Model277 Series converter is equipped with a multiple interface circuit thatcan handle RS-422/485 serial interfaces andmulti-mode or single- mode fiber. Model277converters are used to extend serial transmission distance up to 2 km (multi-modefiber) or up to 20, 40, 60km (single- mode fiber). Note that the RS-422/485interfaces cannot be used on the same Model277 at the same time to convert tofiber.Auto Baud Rate DetectionThe Model277 Series incorporates a method for automatically detecting the serialsignal baud rate by hardware. This is an extremely convenient feature for the user.Even if a device's baud rate is changed, the signal will still be transmittedthrough the RS-422/485 to fiber converter without any problem. Features 1 Auto sense serial signal rate, zero delay automatic transmit2 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, 60KMStandard Accord RS-48, RS-422 standard RS-485 signal D+, D-, GND RS-422 signal R+, R-, T+, T-, GND Fiber signal IN, OUT Working Asynchronism, point to point Direction control Adopt automatic send data control, auto distinguish and controldata 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 port 5 terminal block Optic port Multi-mode adopt ST/FC/SC connector, signal-mode adopt FC/ST/SC connectorWorking temperature -25 to 70 Storage temperature -40 to 85 Humidity Reality humidity 5% to 95% Input power 5-40VAC Consumption 2WL*W*H 100mm*69mm*22mm Shell Iron Color White Weight 230g

RS485/422 Serial Optic Fiber Modem