User's Manual

16 : O/P 1 INHIBIT N.O. (Output 1 Inhibit Control Input – Normally Open)
A Normally Open (N.O.) sensing input point for controlling the Output 1, with this terminal
connecting to (-) ground, the Egress Button, the group of User PINs and Cards for Output 1 are
all disabled. It is prepared mainly for the cross wire connection with the “Inter-lock O/P” point of
the partner keypad in an Inter-lock system.
NOTE: The inhibit function does not govern the Duress Codes and the Super User Codes. They are
17 : INTER-LOCK O/P (Inter-lock Control Output)
An NPN transistor open collector output with maximum power rating of 24VDC/100mA sink. It is OFF
at normal condition and it switches to (-) ground immediately for the first 5 seconds after keying in
a valid User Code or reading a card to operate Output 1, then, it will keep tying to (-) ground during
the Door Position Sensor is open circuit due to door opening. Use this output point to make cross
wire connection with the partner keypad’s “O/P 1 Inhibit” point in an Inter-lock system to prevent
both doors can be opened at the same time.
An Inter-lock System:
An inter-lock system is a two-door system that always allows only one of the doors to open during
the operation. While one of the doors is opened, the other door keeps close until the open door is
re-closed. It prevents the unauthorized people dashing into a protected area while the doors are in
use.
An inter-lock system needs two keypads and two door position sensing switches for the two doors.
always valid.
11
d) Inter-lock Control
The inter-lock control output always goes to (-) while the door is open, which gives signal to disable
the partner keypad in an inter-lock system. See the Inter-lock terminal 18 description for more
information.
e) Door Opening Alarm
Door Opening Alarm is designed for the emergency door only. It is always given when the door is
opened unless a valid user code or card is used prior to the door is opened. See programming
Location 91 for the details.