The fiber optic converter of RS485/422/232 to Fiber Optic is used to extend  distance up to 2Km over multi-mode fiber or up to 20Km over single-mode fiber. The converter is equipped with multiple interface circuit such as RS-232, RS-422,  RS-485 (2 or 4-wire). It secures data transmission at speeds up to 115.2bps for  RS-232, or up to 500Kbps for RS-422/485. Key Features ◎    DB-9 or Terminal block option ◎    Speeds up to 115.2Kbps base for RS-232, 500Kbps for RS-422/485 ◎    Extend transmission distance up to 20Km Technical Specification Model No. Interface Fiber Type Wave Length (nm) Distance EX9541 DB-9(male) Multi-mode 820 2Km EX9542 DB-9(male) Single-mode 1310 20Km Standards:                         TIA/EIA-232(ITU-T V.28)                                          TIA/EIA-422(ITU-T V.11)                                          TIA/EIA-485(ISO/IEC8284) Network Interface:   Configuration Port RS-232 (Terminal block/DB9) 1 RS-485/422 (Terminal block/DB9) 1 ST Fiber Transceiver 1   Data Transfer Rate and Maximum Cable Distance Configuration Rate (bps) Up to distance RS-232 115.2K 15m (50ft) RS-422/485 90K 1220m (4000ft) RS-422/485 500K 92m (300ft) MM Fiber 10M 2Km SM Fiber 10M 20Km RS-232 Port: Terminal Back / DB9 RS-422 Port: Terminal Back / DB9 RS-485 Port: Terminal Back / DB9 ST Fiber Port: Full duplex/Half duplex Fiber cable: 50 / 125, 62.5 / 125, or 100 / 140µm multi-mode                  8.3 / 125, 8.7 / 125, 9 / 125 or 10 / 125µm single mode Data Transfer Rate: up to 115.2Kbps (RS-232)                               up to 500Kbps (RS-485 / 422)   Main Export Markets: Worldwide