Interlogix Concord 4 REV J Installation Manual - Manual (Page 139)

Appendix B: Reference tables
Concord 4 Installation Manual 133
Cross-zoning
Cross-zoning (two-trip) refers to two different group 18 sensors that must be
tripped within two minutes of each other to report an alarm to the central station.
Figure 28 below shows the path of a person walking from the kitchen to the living
room. When the person is detected walking through the kitchen, the motion
sensor in the kitchen is tripped, sounding a local alarm. If motion is detected by
the living room motion sensor within two minutes, an alarm report will be sent to
the central station.
Figure 28: Cross-zone diagram
Note: We do not recommend cross-zoning for exit/entry zones. Each zone can
individually protect the intended area.