Securitron DPA_Series - Manual (Page 3)

PN# 500-15700
Page 3 Rev. C, 04/11
case the DPA returns to normal condition. In the pre-alarm condition, relays #1 and #2 begin to
signal. The length of this condition is defined by time range two, unless the door recloses before
the end of time range two. In that case, again, the DPA automatically returns to the normal
condition. The alarm condition during which relay #1 follows door/lock status but relays #2 and
#3 are signaling will continue indefinitely until two things happen. First, the door must be
resecured and then, the DPA must receive a reset signal.
4. SETTING TIME RANGES 1 AND 2
Note that there are four Dip Switches on the board. They are labeled 1 through 4 and you can
also see that they can be set to labeled positions “on” or “off”. Dip Switches 1 and 2 allow you
to set time range 1 (authorized condition). Dip Switches 3 and 4 set time range 2 (pre-alarm).
The following settings allow four choices of time for each range.
TIME RANGE 1 TIME RANGE 2
DIP #1-OFF; DIP #2-OFF---30 Seconds DIP #3-OFF; DIP #4-OFF---0 Seconds
DIP #1-ON; DIP #2-OFF---1 Minute DIP #3-ON; DIP #4-OFF---15 Seconds
DIP #1-OFF; DIP #2-ON---2 Minutes DIP #3-OFF; DIP #4-ON---30 Seconds
DIP #1-ON; DIP #2-ON---4 Minutes DIP #3-ON; DIP #4-ON---1 Minute
5. WIRING FOR DOOR STATUS AND LOCK STATUS
Earlier in this manual, we have talked about the door being open or insecure interchangeably.
In fact these are two separate conditions and the DPA handles them in a sophisticated way
which includes a unique type of tampering detection.
There are various means of detecting the status of a door. The most common is a magnetic
door switch. This activates when the door opens an inch or so. It says nothing about whether
the door is secure or not. In that sense, it is the poorest type of door status detection. If the
door is an unlatched swing through type, however, a magnetic door switch is the only device
that can be used.
When the door includes a latch, it is possible to detect the presence of the latch in the strike by
use of a "monitoring strike". This component includes a microswitch which is activated by the
presence of the latch. Latch detection is superior to door position detection because it confirms
that the latch is engaged. Many doors that employ DPA's include a panic bar or exterior locked
knob set which permits free egress but not entry. Latch detection in this instance qualifies as
lock status detection as it shows that the door is secure against entry.
Electrically locked doors often allow lock status detection. If an electric strike is mounted, some
models include a signal to show that the latch is engaged. Electromagnetic locks generally offer
lock status detection as an option. Securitron's Senstat Magnalocks are an example.
The issue for use of the DPA is whether you wish to use one signal for initiating the
functions or two. The advantages of using one are lower costs and simplicity. The advantages
of using two are higher security against tampering as will be explained shortly.
When you are using a single door status signal to activate the DPA, select the
highest security signal that you have available. Lock status is better than
door status. Regardless of the signal selected, however, it must be
input to terminal LS and the factory installed jumper between
terminal "+" and terminal IN must be left in place. Terminal IN can
never be used as the only input to activate the unit. It can only be used in
concert with terminal LS.
Note the drawing on the right. The jumper is correctly installed between IN
and "+". The door status or lock status switch is installed between "+" and
LS so that it is closed when the door is secure. The DPA will start its timing
functions when this switch opens so that +V is no longer being fed to terminal LS. Note that if
you are using Securitron's "S" Senstat Magnalock at the door, it provides a direct +V status
signal on its white wire. You need only connect the Magnalock's white wire to terminal LS.
+
LS
BP
FE
IN
RS
DC
ACTIVATE
SWITCH IS
CLOSED
WHEN
DOOR IS
SECURE