Instructions

60
b) INTER-LOCK SYSTEM USING TWO KEYPADS
INT.
LOCK
O/P 1
INHIBIT
ELECTRIC LOCK 1
Door 1
CROSS WIRE CONNECTION
Door 2
ELECTRIC LOCK 2
INT.
LOCK
O/P 1
INHIBIT
An inter-lock system needs two door controllers. This application example uses two DK-2882 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)