The event LED, using special flash rates, identifies the condition of loop fault, whether present or historical. This is the standard operation for intersection control where reliability is the major concern.
Designed especially for intersection control where crosstalk must be eliminated, the 222 GP8 provides four different front panel selectable frequencies. In addition the 222 GP8 also functions as a scanning detector, further reducing the possibility of crosstalk between two loops connected to the same detector.