Keyboard Connectors

The most important input device for a PC is the keyboard. All PC motherboards contain a connector that allows a keyboard to be connected directly to the motherboard through the case.

There are two main types of keyboard connectors. Once, these were the AT and PS/2 connectors. Today, the PS/2-style connector remains popular, but it is quickly being replaced by USB-attached keyboards.

The all-but-extinct original AT connector is round, about 1⁄2 inch in diameter, in a 5-pin DIN configuration.

The PS/2 connectoris a smaller 6-pin mini-DIN connector.

Most new PCs you can purchase today contain a PS/2 keyboard connector as well as a PS/2 mouse connector right above it on the motherboard.

AT keyboard connector










PS2 keyboard connector