What is the abbreviation of io?
io is a computer term and is the abbreviation of "Input/Output".
I/O input/output (Input/Output) is divided into two parts: IO device and IO interface. On POSIX-compatible systems, such as Linux systems, I/O operations can be performed in many ways, such as DIO (Direct I/O), AIO (Asynchronous I/O, asynchronous I/O), Memory-Mapped I/O ( Memory mapped I/O), etc. Different I/O methods have different implementation methods and performances. In different applications, different I/O methods can be selected according to the situation.
Definition
I/O input/output (Input/Output) is divided into two parts: IO device and IO interface.
On POSIX-compatible systems, such as Linux systems, I/O operations can be performed in many ways, such as DIO (Direct I/O), AIO (Asynchronous, I/O asynchronous I/O), Memory -Mapped I/O (memory mapped I/O), etc. Different I/O methods have different implementation methods and performances. In different applications, different I/O methods can be selected according to the situation.
The input and output I/O stream can be seen as reading bytes or packed bytes, taking them out and putting them in, dual-way switching; realizing the weak current line of the linkage control system and the strong current of the controlled equipment. Transfer and isolation between lines to prevent strong electricity from entering the system and ensure the safety of the system;
is connected to the dedicated line control panel to control important fire protection equipment (such as fire pumps, sprinkler pumps, and fans) etc.), one module can control the start and stop of a large fire equipment;
plug-in structure, the base can be installed on the wall first like a detector, and then installed after wiring and before debugging the project. Insert the switching module into the base. Easy to construct and maintain;
uses passive moving contacts or switches AC220V voltage as a response signal.
Confirmation light action light - red, answer light - green; during action, the action light is always on and the answer light is always on.
The IO output port can be connected to a relay. The relay contact load AC250V/3A, DC30V/7A starts as a set of normally open/normally closed contacts and stops as a set of normally open contacts.
The above is the detailed content of What is the abbreviation of io?. For more information, please follow other related articles on the PHP Chinese website!