The N503 Offline Door Module operates independently without a connection to iLOQ Cloud. The N503 has connections for a iLOQ NFC Readers and two lock cylinders. The N503 enables the user to control e.g. of electric doors, elevators, barriers etc. by using a valid iLOQ Key in the connected iLOQ NFC Reader or by using a iLOQ S5 Key in the connected C5 Lock cylinder.