Securitron XDT_Series - Manual (Page 2)

PN# 500-14900
Page 2 Rev. D, 06/11
Once the door has released, it will remain released until manually relocked by a reset device.
This is a normally closed switch which is momentarily activated. Relocking actually occurs on
reclosure of the switch. Most commonly the reset device is a momentary spring loaded
keyswitch such as Securitron's model MK. We recommend that the keyswitch be mounted at the
door as this insures that security staff will actually inspect the door. In some jurisdictions the
reset device may be a doorswitch. With a doorswitch, relocking occurs from the act of exiting
the door. Certain codes require the use of a doorswitch as will be discussed in Section 3. The
American BOCA code does require use of a doorswitch and also has a special and unique timed
relocking sequence which is explained in section 3.4.
FIG. 1: OVERVIEW OF XDT BOARD
NO
NC
C1
C2
C3
+
LS
BP
FE
IN
RS
NC
NC
NO
NO
DIPS
LOCK CONTROL
RELAY
LOCAL ALARM
REMOTE ALARM
RELAY
RELAY
RESET INPUT
INITIATE INPUT
LOCK STATUS INPUT
BYPASS INPUT
FREE EGRESS INPUT
0V (NEG) POWER
+V POWER
NOTE: INPUTS OPERATE
BY BEING CONNECTED TO +V
NORMALLY ENERGIZED
NORMALLY DEENERGIZED
NORMALLY ENERGIZED
DC DELAY CONTROL TERMINAL
Use of the "local alarm relay" as shown in Figure 1 is required by code to signal at the door that
the system is working. The local alarm relay pulses during the nuisance delay period and
steadily energizes during the release delay period. At the end of this period, when the lock
releases, the local alarm relay deenergizes. This informs the person exiting that the door may
be used. A second relay (shown above) is called the remote alarm relay. This relay is
normally energized; it deenergizes to show an alarm condition. It signals alarm from the
beginning of the release delay period until the door is relocked. The remote alarm relay is
intended to signal to a security office that a security violation is occurring at the door. It ignores
the nuisance delay period as this should be seen as a "false alarm" unless the delay becomes
irrevocable. It also continues to signal until the door is relocked, correcting the security
violation. The remote alarm relay should also be considered a general "trouble" signal. If the
board loses power, this relay will deenergize signaling trouble. It is also used to signal other
optional alarm conditions described in Section 7.
3. SPECIFIC CODE REQUIREMENTS
We must strongly emphasize that the following sections on code requirements should not be
considered definitive. They represent Securitron's best understanding of the individual codes at
the time of this manual's most recent revision. Codes, however, can change suddenly and are
also subject to local interpretations that may differ from the descriptions that follow. You should
consider these descriptions as a starting point which should be confirmed or altered by the local
authority having jurisdiction.
In the following 5 sections, we describe individual code requirements in 4 functional areas:
Nuisance delay, Release delay, Relocking and Power. The main issue in the Power function is
whether or not battery backup can be applied to the locking system to keep the door functional
in a local power failure.
All of the codes call for immediate release of all locks in the event of activation of the fire
detection system. The proper way to accomplish this is by employing an auxiliary latching relay
with contacts of appropriate size to handle the total lock load. The relay should be a listed part
of the fire detection system and all lock system DC power should flow through its NC contacts.
The individual codes also typically specify the type of fire detection system that must be in place