Opposite Direction" Fraud; Opposite Direction" Fraud When Free In One Direction - Automatic Systems PNG382 Field Manual

d. "Tailgating" Fraud after passage through doors (fig. 13d)
If an unauthorized entry is detected, in the same direction, after an authorized person passes through
the doors, the "tailgating" fraud alarm is activated:
- the doors close in front of the authorized person unless the security zone is activated,
- the buzzer is activated,
- the pictograms show a red cross.
The alarm will end after a short time-out (% TM6) (1 sec by default). If there is still a presence in the
entrance corridor and if authorization is submitted in the meantime, the doors will open. Otherwise
there will be an "intrusion" fraud (see above).

4.2.1.3. "Opposite direction" Fraud:

The PNG is operated in a controlled mode in one direction and a controlled or locked mode in the other
direction.
A user presents a valid ticket and can enter the walkway. While the doors are open, any persons entering
from the opposite direction (through the exit zone) will set-off an "opposite direction" fraud. An alarm is
activated immediately:
- the doors close in front of the authorized person unless the security zone is activated,
- the buzzer is activated,
- the pictograms show a red cross.
The alarm will end when the exit zone has been freed and after a short time-out (% TM6) (1 sec by
default). The doors will reopen if the authorized person has not yet passed through and the time-out
allowed for authorized passage is returned to zero.
By default detection of entry into the exit zone will take place over 3 cells: detection is activated when the
A3
first and the second cell are successively darkened while leaving the third free.
It is possible to choose entry detection "opposite direction" for two cells in the PNG configuration
procedure (DIP2 of word 3). In this event, detection will take place more quickly but there will
consequently be an increased risk of false alarms during the passage of the authorized person.

4.2.1.4. "Opposite direction" fraud when free in one direction

The PNG is operated in a free mode in one direction and a controlled or locked mode in the other
direction.
Entry through the controlled direction:
A user presents a valid ticket and can enter the walkway in the controlled direction. While the doors are
open, a person enters in the opposite direction in free mode. Two types of "opposite direction" detection
are possible:
 Automatic Systems PNG38X-A3_1-04-gb-02.doc
"Opposite direction" Fraud
authorized user
Fig. 13 e
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ALARM
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