Here a pair of wireless 2DI-4DO RFScada units remotely protect, monitor and control access to a secure location up to 25 miles away. Alarms are activated whenever access is required or gained. The electrical lock may be controlled remotely or locally. Remote indication is supplied to show if the door is securely closed, when it is opened plus full visual status of conditions. Alarms indicate all faults and abnormal conditions, such as power fail or forced entry.