The dry contact to fiber optic converter provides 4-channel unidirectional dry contact or 2-channel bidirectional dry contact transmission over optical fiber. It solves problems related to electromagnetic interference, ground loop interference, and lightning damage, thereby improving the reliability, security, and confidentiality of data communication. It can be widely used in various industrial control, process control, and traffic control applications, and is especially suitable for use in departments and systems such as banks, power supply, and those that have special requirements for the electromagnetic interference environment.




