This is a low cost proximity card access controller with dual output for external controlling. One output from the relay directly with NC and NO connection. The other is a power output for driving external devices. The AL338F standalone access controller can accept a maximum of 338 proximity cards. A 9 to 12V DC supply is required to power the kit, which has a current consumption of less than 200mA. A 9VDC/300mA (2.1mm center positive) plug pack will do fine. 

Put either CLRA or CLRM to ON position and power up the unit. The unit is waiting for a master card to be read. Pick a proximity card and put on top (around 1 inch above) of the AL338F, the card is read and  tored as the master card. Then remove the power and put both CLRA and CLRM to OFF position. On next power on, the unit will be in normal operation.

When the unit is in normal operation, put the master card on top of the AL338F, the unit will enter into programming mode with red LED stays lite. Then place a card on top of AL338F, if the unit responds with a single beep sound means authorization is granted to that card. On the other hand, if the unit responds with a dual beep sound means authorization is removed from that card. If no more card need to be added or removed, the unit will return to normal operation after 5 seconds idle. If a long beep is responded, it means all memory locations are occupied.

If an authorized granted card is placed over the AL338F, the green LED and the relay is turned on as set by TMR0, TMR1 and TMR2 with a beep sound. On the other hand, if an unauthorized card is placed over the AL338F, the green LED and the relay will have no action but with a long beep sound. An input contacts is provided, if it is shorted, the unit will respond the same as an authorized card read.