Multi-door interlocking is used to control the entry of persons to a secure area such as a clean room, where dust or small particles may be a problem. One multi-door interlocking group is composed of at least two doors and only one door can be opened simultaneously.

1. Click Logical View on the home page.
2. Choose one of the following methods to enter the area's resource group page.

   • Select one area and click to enter the editing area page.

     Figure 1. Enter Area Editing Page

   • Select Group tab on the left to display all the resource groups of different areas.

     Figure 2. Enter Resource Group Page
3. In the Multi-Door Interlocking field, click Add to add a multi-door interlocking group.
   Figure 3. Add Multi-Door Interlocking Group
4. Create a name for the group.
5. In the Door field, click Add to select the doors to add them to the group. Among the added doors, only one door can be opened simultaneously.
6. Optional: You can locate the multi-door interlocking group on the map by setting the locations of the doors in the group and setting the border of the region for detection.
   1. Check Add to Map.

      The region as well as the doors in the group will be added to the map of the area on the right.

   2. Drag to draw the region according to the actual needs.
   3. Drag the icons of the doors to set the their locations on the map.
   4. Right click to finish.
      Figure 4. Draw Multi-Door Interlocking Group on Map

   After adding the multi-door interlocking group on the map, when multi-door interlocking alarm is triggered by the doors in the group, the client will notify the user by highlighting the region on the map and you can view the real-time alarms triggered in the region in the Monitoring module on the Control Client.

7. Click Add.

   The multi-door interlocking group is added in the table and you can view the doors in the group.