The autonomous code lock combines the functions of a touch access control keypad, a card reader, a proximity tag, and a fingerprint reader. This modern device works with electromagnetic locks that use an access control system. It can also control other electrical or alarm devices. The lock features a relay output. Authorized individuals can enter a room or building by reading a card, entering an access code, or scanning a previously stored fingerprint. The non-volatile EPROM memory retains stored codes and parameters even when the power supply is interrupted. It has a durable and highly weather-resistant housing. The lock is suitable for surface mounting. LEDs indicate the operational status of the encoder.