2  支持點對點或環路(點對多點)連接

2  RS422/RS485/RS232 接口(kou)通訊速(su)率 300～115200bps

2  支持 2 線(xian)(半雙工(gong)(gong))和 4 線(xian)(全雙工(gong)(gong))工(gong)(gong)作模式

2  支持主(zhu)從(cong)工作(zuo)模式，從(cong)模式可作(zuo)為中(zhong)繼器(qi)使(shi)用

2  工業級(ji)光(guang)電器件提(ti)供良好的光(guang)電特性，保證數據傳輸可靠，工作壽命長

2  滿足工業(ye)4級(ji)電(dian)磁兼容性要求

     ME-M277B 系(xi)列(lie)是多(duo)功(gong)能的支持異步 RS-232,RS-422,RS-485 通(tong)(tong)(tong)信(xin)接口的光(guang)纖(xian)(xian)(xian)調制(zhi)解調器(qi)(qi)（光(guang)貓），ME-M277B 光(guang)貓是 連接遠(yuan)程終端單元(RTU)到主機(HOST)或分布式數(shu)據采集系(xi)統(tong)(SCADA)控制(zhi)器(qi)(qi)的最(zui)佳選擇。ME-M277B 使(shi)(shi)用(yong)(yong)普通(tong)(tong)(tong)多(duo)模(mo)光(guang) 纖(xian)(xian)(xian),最(zui)遠(yuan)傳輸(shu)距(ju)離超過 2km；單模(mo)光(guang)纖(xian)(xian)(xian)最(zui)遠(yuan)傳輸(shu)距(ju)離超過 40km，通(tong)(tong)(tong)信(xin)速率可(ke)(ke)(ke)達 460Kbps。 ME-M277B 系(xi)列(lie)光(guang)纖(xian)(xian)(xian)調制(zhi)解調器(qi)(qi)采用(yong)(yong)光(guang)纖(xian)(xian)(xian)作為傳輸(shu)介質,可(ke)(ke)(ke)有(you)效避免惡(e)劣環境下（如雷(lei)電(dian)(dian)、浪(lang)涌、電(dian)(dian)磁干擾等）對(dui) 數(shu)據通(tong)(tong)(tong)信(xin)質量的威脅,同時(shi)可(ke)(ke)(ke)省(sheng)去原來使(shi)(shi)用(yong)(yong)電(dian)(dian)纜通(tong)(tong)(tong)信(xin)時(shi)的雷(lei)電(dian)(dian)浪(lang)涌保(bao)護設備投資。所(suo)有(you)器(qi)(qi)件的選型和設計都按照工(gong)業 級以上標準，可(ke)(ke)(ke)充(chong)分滿足工(gong)業現場的特(te)殊需要（如耐高溫、抗干擾、寬電(dian)(dian)壓、防塵、防靜電(dian)(dian)等）。