GE Concord 4 Installation Manual page 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
Path of
person
walking
Note: We do not recommend cross-zoning for exit/entry zones. Each zone can
individually protect the intended area.
Concord 4 Installation Manual
Motion sensor
Motion sensor
Appendix B: Reference tables
127