The units that allow an ATM to receive data are called Input Units; the units that allow data to be displayed are called Output Units.
Input Units:
There are two types of input units: the Card Reader and the Keypad.
- Card Reader:
The card reader is a device that reads the private account information on your card.
- For ATM cards, the magnetic stripe on the back of the card,
- for credit cards, the card's chip is used to connect with the card reader.
The data read by the card reader is used in transactions carried out through the ATM.
- Keypad:
The keypad is the device on the ATM used to enter the PIN, to enter the amount to withdraw in Withdrawal transactions, and to enter the amount to deposit in Deposit transactions. Only numeric values can be entered on the keypad.
Entered values can be changed or cleared. After the PIN is entered, the ENTER key can be used to log in to the system.
Output Devices:
There are four output devices.
- Speaker:
The speaker is a device that provides audible feedback when a specific key is pressed.
- Notification Screen:
This is the screen on which the details of the transaction performed on the ATM are displayed. For example: balance information, the amount to be withdrawn, bill information, warning messages given to the user, and so on.
- Receipt Printer:
The receipt printer produces a printout containing the transaction details after the transaction.
- Cash Dispensing Unit:
This is the unit that physically dispenses the cash during a Withdrawal transaction performed at the ATM. The ATM's function is to give the customer the amount of cash appropriate to the transaction.
