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2) INTER-LOCK SYSTEM USING TWO KEYPADS
An inter-lock system needs two door controllers. This application example uses two DK-2822 with
simple cross wire connection on their "Output 1 Inhibit" and "Inter-lock Control Output" terminals.
It is necessary to link up the "(-) GND" terminals of the two keypads as common ground to achieve
the inter-lock logical functions.
Use keypad to open the door from outside
Press egress button to open the door from inside
Connect the door magnetic sensors on the doors to monitor their positions
While door 1 is open, then, door 2 is forced to keep close, or vice versa
Use N.O. Relay output for fail-secure lock; and N.C. output for fail-safe lock
Please also see the "NOTE" stated in the Application Example (1)
1
2
3
4
5
6
7
8
DATA
I/O
TAMPER
(+) (–)
DATA
N.C.
DOOR LOCK
I/O
(+)
N.O
(–)
EGRESS
BUTTON
EGRESS
(+)
(–)
BUTTON
(OPEN DOOR 1
ELECTRIC LOCK
FROM INSIDE)
IN4004
1
2
3
4
5
6
7
8
N.C.
DATA
I/O
TAMPER
(+) (–)
DATA
N.C.
DOOR LOCK
I/O
DOOR 1
SENDING
(+)
N.O
(–)
EGRESS
BUTTON
(+)
(–)
ELECTRIC LOCK
IN4004
58
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