射频卡开锁，开锁时用射频卡放在读卡器上(距离<15CM)即可开锁，如果用非法卡连续刷写次数超过3次则报警，这时系统将关闭刷卡器30分钟，在30分钟后再允许刷卡。

-RF card lock, RF card lock used on the card reader on the (distance < 15CM) to unlock, if illegal brush to write the number of cards for more than three times the alarm, then the system will be closed 30 minutes card device, Allow 30 minutes after the credit card.