Locknetics ScanII Infrared Scanner

Locknetics Scan II Infrared Scanner detects movement within a particular range. It is called a Passive Scanner because it picks up changes of light or heat within it's range. It is basically a receiver.

Active Scanners work more like radar, where they emit some kind of light or radiation and detect a ''bounce back image''. Passive scanners are more effective in door hardware applications because they are more reliable and cheaper. They also are more compaitble with various hardware types.

When using a scanner in your application be sure to look that it is the Passive type.

Scanners are used almost exclusively with mag lock door locks. Mag locks stay in the locked mode until power is cut off by the power supply. Mag locks don't know which side of the door you are on and simply hold the door securely in place. A method needs to be provided that allows for easy unlocking from the inside of the door.

Scanners work well because they are always on and require no input from the user to operate. A person simply walks towards the door to activate the scanner.

Once activated, the scanner sends a signal to the power supply to unlock the door. A timer within the scanner also begins it's countdown. As it reaches zero, the signal to the power supply is stopped, thereby relocking the door.

Fire Codes in many cities require emergency exits to be exited ''with no prior knowledge''. This means a person in a panic needs no instruction in order to exit the door.

Note that some cities also require a backup means of exiting should the scanner fail. This backup consists of a wall-mounted pushbutton. It too wires directly to the power supply and releases the door when the button is pushed.

Whether required or not, it's always a good idea to have this type of secondary backup. Select a push button with a built-in timer, such as Securitron's EEB2. Optionally, use a standard push button with add-on timer such as HES's 2005 SmarPac II or Securitron's TM-9.