RS485/RS422/RS232 universal single-mode optical fiber converter. Baud rate self-adaptive; Transparent data transmission; No need to change the original communication protocol and software; 9-40VDC wide voltage isolated power supply; Rate: 0-500Kbps, self-adaptive; Wavelength: 1310nm. Applicable optical fiber: single-mode 9/125, 10/125, 8.3/1; Transmission distance: 0-20km (up to 60km or 120km, need to declare, standard FC connector); ST optical fibre splice; -40-+85℃ industrial grade working temperature; Standard lead rail mounting.