
L
N
1N4004
1N4004
Input
AC100
-
240V
Door
Bell
Alarm
Door
Contact 1
Exit
Button 1
Lock
1
(
A
/
B
)
Lock
B Lock
A
Inside Door
Outside Door
Short
-
Circuit
Wire
Red Black Green White
Access Host (Enter Door 1
)
Door
Contact 2
Exit
Button 2
1N4004
1N4004
Lock
2
(
A
/
B
)
Lock
B Lock
A
Red Black Green White
External Reader(Enter Door 2)
9.8 Anti-passback for Two Doors
In this mode, access host on door 1 is anti-passback master unit,and external reader on door 2 as the anti-passback
auxiliary unit. Then they build up a two doors anti-passback system, which is normally used for parking lot.
The users can only enter door 1 when read valid card on access host, and exit from door 2 when read valid card on
external reader. If without the entering record from door 1, the users cannot exit from the door 2, also the users can't
enter in twice without the first exit record.
Remark: This is only for card users of Zone 1, PIN users of Zone 1 and all users of Zone 2 are invalid.
Access Host
Application
Scene
Graph
27
28
Standalone for single door
Standalone for two doors
Two units interlocked for two doors
With external reader for two doors
Access
Host
Access
Host
External
Reader
External
Reader
Door 1
Door 2
Door 1
Door 2
Access
Host
Door 2
Door 1
Door 1
Door 2
Access
Host
Figure 1
Figure 2