Securitron XDT_Series - Manual (Page 7)

PN# 500-14900
Page 7 Rev. D, 06/11
A special situation arises if a momentary bypass switch is used during the release delay period.
The lock releases immediately for as long as the bypass switch is closed. The 15 or 30 second
release delay countdown continues "in the background" as by code, this process is irrevocable.
If the bypass switch reopens before the release delay expires, the lock will resecure and
correctly release again when the underlying release delay times out. The bypass switch,
therefore can be used for momentary immediate exit or entry during the release delay period
without affecting code legal operation of the board.
7.3 FREE EGRESS FUNCTION
The free egress function puts the board in a different operating mode. When +V is switched to
terminal FE by an alternate action switch, the board goes into free egress mode. In this mode,
use of the initiate device, immediately releases the door for egress. When the initiate device is
released, the door immediately relocks. Often, a time clock such as Securitron's model DT-7 is
used to put the door into free egress mode during the day and exit delay mode at night.
FIG. 4: OPTIONAL FREE EGRESS AND LOCKDOWN MODES
NO
NC
C1
C2
C3
NC
NC
NO
NO
AN EXTERNAL ALTERNATE SWITCH IN PARALLEL WITH
INITIATE WILL PUT THE BOARD INTO LOCKDOWN.
WHEN +V IS SWITCHED TO "FE",
THE BOARD IS IN FREE EGRESS
MODE. THE INITIATE SWITCH
IMMEDIATELY RELEASES THE LOCK
WITH NO ALARM, EXCEPT
OPTIONALLY FROM THE LOCK STATUS MONITORING FUNCTION.
INITIATE (NC)
INITIATE CAN NOT BE READ
+
LS
BP
FE
IN
RS
DC
The free egress mode differs from the bypass mode as follows: When the door is bypassed, the
fail safe lock is released so that both entry and exit is freely possible. Also, during bypass mode,
the board performs no monitoring functions. In the free egress mode, the lock remains secure
so that entry is blocked, but egress without alarm signaling occurs immediately when the initiate
device is pressed. If lock status monitoring is in use, the remote alarm relay will still report a
door that doesn't resecure within 5 seconds after a free egress event.
The free egress function is most successfully used with a switched exit device such as
Securitron's Touch Sense Bar. Free egress occurs with a single motion. If a push button is
being employed, the button will have to be held and the door pushed open with the other hand.
7.4 LOCKDOWN MODE
It may be desired that exit delay be employed during the day but at night and weekends, when
the building is empty, the door should be locked with no unauthorized egress or entry possible.
This is most easily accomplished by the use of a time clock switch, such as Securitron's model
DT-7, which will close across terminals "+" and IN to put the board into lockdown. This simply
shunts out the initiate device so that the board cannot respond to its use. If authorized entry or
exit is desired, the bypass function will still release the door for 5 seconds. If lock status
monitoring has been implemented, an alarm signal will still be created in the event of a forced
door or a bypassed door that doesn't relock. We recommend that use of lockdown mode be
checked with the local approving authority in advance.
7.5 LOCK POWERED AFTER RELEASE DELAY MODE (DELAY CONTROL)