The Key ActiveOutput will switch to (-) ground
for 10 seconds whenever a key is touched. You
may use it to turn ON an LED lamp and /or a
small buzzer to notify a guard; or to energize
a relay to switch ON lights or trigger an CCTV
Camera tostar t recording.
Make sure that the relay for switching ON
lights has high enough isolationbetween high
voltage and low voltage to prevent damage of
the keypad.
Only one connection option is recommended.
Make sure the sink current does not exceed the
maximum rating of 100mA.
External power supply and isolation relay are
strictly necessary in driving high power device,
such as lights.
APPLICATION HINTS FOR THE AUXILIARY TERM INALS
The tamper switchis Normally Closed while the keypad
is secured on gang box. It is open when the keypad
is removed from the gang box. To prevent sabotage,
connect these terminals in series with a 24 hour N.C.
protectionzone of analarm system if required.
With the help of a Normally Closed door
position sensor ( usually a magnetic door
switch) on the door to set up the following
functions:
Door Auto Relock - - The system will immediately
relock the door after a valid access has beengained to
prevent "tailgate" entries.
Door Forced-open Alarm -- The keypad will generate
alarm instantly if the door is forced toopen. Enable the
function with Programming Option801.
Door Propped-up Alarm -- The keypad will generate
alarm if the door is left open longer than the pre-set
del ay time. Enable the function with Programmi ng
Option 9 with time of 1 to 999 seconds possible.
Inter-lock Control -- When t he door is open, the
interlockoutput of the keypad will give a(-) command
to stop the other keypad inan inter-locksystem.
a)
b)
c)
d)
(A) TAMPERN.C.
(B) DOOR SENS
(C) KEY ACTIVE
18
12-24V AC/DC(POWERINPUT)
Connect to 12-24V AC or DCpower supply. The (-) supply and (-) GNDarethe common grounding points of the
keypad system. No selectionjumperis required for thefull input voltage range.
Connect DC power with the (+ ) and (-) polarity indicated; and there is no polarity discrimination for AC power
input.
OUTPUT1
5 Amp relay dry contacts, recommended for door strikecontrols. Normally Open (N.O.) andNormally Closed (N.C.)
outputs are available. Use N.O. output for Fail-secure locking device and N.C. output for Fail-safelocking device. The
relay can be programmed in Start/Stop(toggle) mode or timermode from1 to 999 seconds.
OUTPUT2
This is an auxiliaryoutput controlled by theUser Code2, whichis ideal for controlling security systems &automatic
operators. It is programmable forStart / Stop (toggle) operationor timingoperation from 1 to 999 seconds.
It isa relayoutput with 1Amp rating Normally Open (N.O.) and NormallyClose (N.C.) dry contacts.
EGIN(EGRESS INPUT)
A Normally Open (N.O.) input terminal refers to (-) ground, with thehelp of a normally open button to activate the
Output 1 for the same time period as the user code. Egress button is usually put inside the house near the door.
More than oneegress buttons can be connected inparallel tothe terminal. Leave this terminal open if it is not used.
KEY ACT.(KEYPAD ACTIVE OUTPUT)
An NPNtransistor open collector output. It switches to (-) ground for 10 seconds on eachkey touching. This can
beused to turn on lights, CCTVcamera, or buzzer tonotify a guard.
The rating of thisoutput is: Ic max: 100mA sink, Vc max: 24VDC
DU OUT (DURESSOUTPUT)
An NPN transistor open collector output. It switches to (-) ground after theDuress Codeis entered. Useit to trigger
analarm zone, or turn ona buzzer tonotify aguard.
Ic max: 100mAsink. Vc max: 24VDC
DOOR SENS(DOORPOSITION SENSOR INPUT)
A Normally Closed (N.C.) input terminal referring to (-) ground. With thehelp of a normally closed magnetic door
switch, the system will monitor thepositionof the door and will givethefollowingfunctions:
NOTE: Always connect this terminal to (-) ground if not used.
1)
Door Auto Re-lock
2)
3)
4)
3
NOTE:
(1)
Cut a rectangular holeon wall carefully for theback box in its right sizeanddepth to ensure thatthe back
box and the faceplatecan be tightlyshielded together with its rubberpadwhile they are fixed onwall.
(2)
The four holeson the back sideof the box areprepared for fixingtheback box on solid wall withscrews.
(3)
The four holeson the front edge oftheboxareprepared for fixing the back box on hollowwooden wall.
(4)
Thetamper switch of the DK-2880A ismagnetically activated. A magnet is equipped on the back of the
back box.The tamper switch is closed circuit (N.C.) while the keypad isfixed on its backbox.
The system will immediatelyrelock the doorafter valid access has been gained beforetheend of the programmed
time for output 1, that prevents unwanted "tailgate" entries.
Door ForcedOpenAlarm
The keypad will generatedoor forced-open alarm instantly if the door isforced to open without a valid user entry
or egress input. Thealarm will last for 60 seconds and can be stopped withuser code 1or oneof the usercodes
in Group 1at anytime. This functionis selectablevia the programmingoptionsat Location80.
Door Propped-up Alarm
When thedoor is left open longer than the allowabletime. The keypadwill generate door propped-up alarmafter
the expiryof the pre-set door-open-time until the door is closed again. The door-open-time is programmable from
1 to 999 secondsat Location9.
Inter-lockControl
The inter-lockcontrol output goes to(-) while the door is openin orderto givesignal to disable the other keypad
in the inter-locksystem.