• Product name: DB9 DB15 DB25 serial port male and female plug + plastic metal shell
• Color: white plastic core, blue plastic core, black plastic core
• Shell: plastic shell metal shell
• Product overview: Metal shell DB9 and three-row DB15 are common, DB15 plastic and DB9 plastic shell, metal shell, one piece is the price of 2 sets!
• Scope of use: It is suitable for data line use of PLC programming line, feel screen connection line, data transmission line, instrumentation and other equipment.

The RS-232 standard interface (also known as EIA RS-232) is one of the commonly used serial communication standards. It was jointly formulated by the American Electronics Industry Association (EIA) in conjunction with Bell Systems modem manufacturers and computer terminal manufacturers in 1970. , whose full name is "Serial Binary Data Exchange Interface Technical Standard between Data Terminal Equipment (DTE) and Data Communication Equipment (DCE)".

Computer accessories have a variety of converters, such as PS2 to USB, VGA to DVI interface and so on. In fact, it is to convert a certain kind of connector to another kind of interface. For example, if you have a mouse with a round port, but the computer at hand does not have a mouse port with a round port, you can use a USB-to-PS2 converter to plug it into the USB port, and the other end of the head is the so-called round port. You can plug in the round mouse and use it.