302UM0017 Rev 01
PD230 Enhanced Detector User Manual
Page 21 of 37
If a vehicle enters Channel 1 Loop and then proceeds to Channel 2 Loop, a 150 ms pulse will
be issued on Channel 1 relay output as the vehicle leaves Channel 1 Loop.
If a vehicle now enters Channel 2 Loop and then proceeds to Channel 1 Loop, a 150 ms
pulse will be issued on Channel 2 relay output as the vehicle leaves Channel 2 Loop.
Progress of a vehicle over the loops
Case 1:
(AB LOGIC Pulse Mode)
Forward direction
A - Vehicle Enters Loop1
B - Vehicle Exits Loop 1,
C - Vehicle Enters Loop2,
D - Vehicle Exits Loop 2,
Typically caused by loops
being too far apart or very
small vehicles
Case 2:
(AB LOGIC Pulse Mode)
Forward direction
A - Vehicle Enters Loop1
B - Vehicle Enters Loop2
C - Vehicle Exits Loop 1
D - Vehicle Exits Loop 2
This is the correct forward
operation for Pulse
AB Logic
Case 3:
(AB LOGIC Pulse Mode)
Reverse direction
A - Vehicle Enters Loop2
B - Vehicle Exits Loop 2
C - Vehicle Enters Loop1
D - Vehicle Exits Loop 1
Typically caused by loops
being too far apart or very
small vehicles
Summary of Contents for PD230 Enhanced Vehicle Detector
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