Industrial Single-Mode, 1310nm, 20Km, ST Fiber Connectors. Supports RS-232 / RS-422 / RS-485. Plug & Play – No Dip Switches to set. Power: 110 ~ 370 Volts. RS232 / RS485 / RS422 to Single Mode Fiber Optic Converter The 20km SER-FIBER-SM-ST OR SER-FIBER-SM-SC is a industrial grade bi-directional externally powered multi-functional RS232/RS485/RS422 to Single Mode Fiber Optic Converter which converts either full-duplex RS232, half-duplex RS-485 or. Moxa's industrial-grade serial-to-fiber optic converters can convert RS-232/422/485 to optical fiber, which provides users with an easy and reliable way to communicate with their serial devices. Note: When using a power meter to measure the fiber TX power, set the baudrate to 9,600 bps and send. Our rugged, industrial-grade, point-to-point RS232 / RS485 / RS422 serial to fiber optic converters work in pairs to extend serial signals (RS232, RS485, RS422, and TTL) over long distance. FOSTCDRi-Sx extends serial data ranges up to 15 km (9. Thor Fiber Multi-Serial (RS-232 / RS-485) + 2 x RJ45 Fiber Optic Converters that transmit a serial protocol over fiber with 2 ports for Ethernet transport. The serial port interface is a terminal block connector field wiring. TCF-142 converters are used to extend serial transmission up to 5 km (TCF-142-M with multi-mode fiber) or up to 40 km (TCF-142-S.