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 th