First, use 

 Boston Electronics OPT485 [S] -9 mini RS-232/485/422 / fiber converter with Boston OPT485 [S] Series RS-232/485/422 / fiber optic converter full functionality, smaller, and can be extrapolated directly to DB-9 pin RS-232 port. 

 This series is Boston's patented electronic products, with China Patent No. 2023.5, was Boston's first electronic inventions and all the world's smallest serial port (RS-232/RS-485/RS-422) and fiber optic converter. As a result of optical fiber as a communication transmission medium, high isolation voltage, electromagnetic interference, anti-lightning and so on. Boss fiber converter widely used in various industrial process control, distributed data collection and other occasions, especially for power system automation, traffic control and other departments. 


 Second, the hardware installation 

 OPT485-9 type RS-232/485/422 / Fiber Converter (multi-mode) shape for the DB-9/DB-9 adapter box size, which DB-9 (socket) at one end directly into the DB-9 pin RS-232 pin seat, an external 5V power supply, use a pair of ST fiber optic connectors. 

 OPT485S-9 type RS-232/485/422 / Fiber Converter (single mode) shape for the DB-9/DB-9 adapter box size, which DB-9 (socket) at one end directly into the DB-9 pin RS-232 pin seat, an external 5V power supply, using a pair of FC fiber optic connector. 

 OPT series fiber converters used to send each other via optical fiber access receiver. Pay attention to maintaining the ST fiber optic converter FC Block, Block, or clean, if not connected, be sure the rubber plug with a matching sub-cover. 


 Third, the performance characteristics 

 Boston Electronics OPT Series RS-232/485/422 / fiber converter above the highest rate of 115.2Kbps. All without any initialization settings! Unique zero delay automatic send and receive Boston conversion technology, ensure that it meets all of the software! OPT485-9 of the DB-9 hole side can be directly extrapolated PC-DB-9 pin RS-232 port ( needle seat), only use RXD-2, TXD-3, GND-5 three signal lines.