PN# 500-14900
Page 6
Rev. D, 06/11
7. OPTIONAL FUNCTIONS
The following optional functions are not necessary to meet delayed exit safety codes but may be
implemented as desired to increase the utility of the application.
7.1 LOCK STATUS REPORTING
The LS input is for optional lock (or door) status reporting. Note that when the XDT is delivered,
the LS terminal is jumpered to the "+" terminal. In this mode, the board interprets the lock as
being secure so no reporting occurs, and the board can be used for normal delayed exit.
To implement lock status reporting, a lock status switch, door switch or positive voltage signal
should be connected to LS so that +V is present on LS when the lock or door is secure. If the
lock or door stops reporting secure when the door has not been released by the board, the
remote alarm relay will switch 5 seconds later and remain switched until LS again reV.
The purpose for the 5 second delay is to allow a door to reclose and again report secure after
legitimate use. If any function of the XDT board has released the door, the LS input will be
ignored until the board has relocked the door. This feature allows use of the XDT board to
perform exit delay and yet also report on propped doors or forced doors.
FIG. 3: OPTIONAL LOCK STATUS AND BYPASS FUNCTIONS
NO
NC
C1
C2
C3
+
LS
BP
FE
IN
RS
NC
NC
NO
WHEN DOOR OR LOCK STATUS SWITCH
COV TO "LS", THE DOOR IS
CONSIDERED SECURE. IF THE SWITCH
OPENS WHEN THE DOOR SHOULD BE
SECURE, THE REMOTE ALARM RELAY
WILL SIGNAL AFTER A 5 SECOND DELAY AND REMAIN IN THIS
STATE UNTIL THE SWITCH CLOSES AGAIN. THE WHITE WIRE OF
A SECURITRON "S" MAGNALOCK CAN CONNECT DIRECTLY TO
"LS".
WHEN +V IS CLOSED TO "BP", THE LOCK WILL RELEASE
AND ALL ALARMS WILL BE SUPPRESSED. USE WITH AN
ALTERNATE SWITCH ALLOWS RELEASE OF THE LOCK
FOR A PERIOD OF TIME. USE OF A
MOMENTARY SWITCH RELEASES THE LOCK
FOR 5 SECONDS TO
PERMIT AUTHORIZED
USE OF THE DOOR.
NO
DC
7.2 BYPASS FUNCTION
The optional bypass function has two purposes: door release for extended periods and
authorized entry or exit through the door. Release for extended periods is usually implemented
on a time schedule. A door may be released all day and put into delayed exit mode at night for
security. To accomplish this, +V is simply switched into the BP terminal by a time clock or other
alternate action switch. When the BP input is recV, the lock is released and all other
functions of the board are suppressed. The initiate switch will not start nuisance or release
delay and lock status monitoring is suppressed since, during bypass, the lock is not supposed to
be secure. The two alarm relays will remain in their normal states.
For authorized door use, a momentary switch connects between BP and +V. When the switch
closes, the door releases. When the switch reopens, the door remains released for 5 seconds.
This is called an "off delay" function. When the BP terminal is used in this manner with a
momentary switch, timed authorized entry or exit can be performed.
A typical application for the bypass function is the use of a double momentary keyswitch such as
Securitron's model MK with MKS second switch. When turned in one direction, the MK will
perform relocking after a delayed exit event. When turned in the other direction, the MK will
perform bypass so that an authorized person will be able to release the door for 5 seconds for
immediate egress without creating any alarm. In similar fashion, a momentary keyswitch can
operate the bypass function from the exterior of the door for authorized timed entry.
