SDC 921P EntryCheck - Manual (Page 4)

KEYPAD WIRING
See Fig. 3 for an example of a basic door installation. The keypad is
mounted adjacent to the door. An electric door strike is mounted in the
door jamb to release the door lock. A magnetic switch is mounted on top
of the door jamb for detecting when the door is open.
Use the following steps to wire the keypad. Refer to the wiring diagram
shown in Fig. 4 to assist in the wiring.
Note: Up to 500 feet of 18 AWG wire can be run for power, use larger wire
for longer runs. Use 22 AWG or larger (depending on load) for other
connections.
Output
Install a low voltage fail-secure electric door strike for unlocking the
door.
Route two wires between the door strike and the external controller.
Connect a MOV or varistor across the coil wires of the strike.
Connect the (+) door strike wire to the keypad’s MAIN RELAY N.O.
terminal. Connect the other door strike wire to the keypad’s PWR (-)
terminal. Connect a wire between the keypad’s PWR (+) terminal and
the MAIN RELAY COM terminal.
Power
Choose a location for the DC power supply or AC transformer.
Connect the power supply’s output terminals to the keypad’s PWR
(+) and (-) terminal. Observe wiring polarity if using DC. If AC is
being used, polarity does not mater.
Caution: If the unit is AC powered, make sure the secondary of
the system transformer is isolated from earth ground.
Earth Ground
To avoid damage to the unit from static discharges, connect the
EARTH GROUND to E1, E4, E5 or E7 to a good earth grounding
point. Suggested wiring size is 18 AWG for earth ground.
Sense Input
RE Note: The SENSE input (E8) can be programmed for either a door
sense or inhibit input. Both features cannot be used at the same time. If
you are not using the sense input, program the input for inhibit.
To use the door sense feature to detect forced entry or door ajar
conditions, install a normally closed door switch on the door and route
two wires from the switch to the external controller. Connect the door
switch to the keypad’s SENSE terminal (E8) and ground terminal.
(Either E1, E4, E5, or E7)
If an inhibit switch or timer is going to be used for temporarily
disabling the keypad, route two wires from the switch or timer to the
keypad box. Connect the inhibit switch/timer normally open terminals
to the keypad’s SENSE (E8) and ground (Either E1, E4, E5, or E7)
terminal.
Request-to-Exit Input (wiring shown Fig. 4)
If a request-to-exit pushbutton is going to be used, route two wires
from the keypad box to a normally open pushbutton mounted on the
secure side of the door. Connect the wires to the pushbutton and to
the keypad’s REX (E6) and COM (Either E1, E4, E5 or E7) terminals.
Solid State Outputs
The two solid state outputs (Outputs #3 & #4) can be programmed to
activate during various conditions. These outputs can be used to activate
indicators or sounders. See Fig. 5 for wiring examples using the solid
state outputs.
Fig. 3 Basic Door Installation
Fig. 4 Basic Door Installation Wiring
C
NC
NO
C
NC
NO
NC DOOR
POSITION SWITCH
NO REQUEST-TO-
EXIT SWITCH
SENSE
GROUND
REQUEST-TO-EXIT
GROUND
GROUND
GROUND
OUTPUT #3
OUTPUT #4
EARTH
GROUND
CONNECTION
A
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e
s
s
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ry
T
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rm
in
a
ls
8
7
6
5
4
3
2
1
TO POWER SUPPLY
KEY PAD POWER
12-24 VOLTS
AC OR DC
} +
-
AUXILIARY RELAY
2 AMPS @ 28VDC
MAX
}
NC
NO
COM
FAIL SECURE CONNECTION
FAIL SAFE CONNECTION
MAIN RELAY
5 AMPS @ 28VDC
MAX
}
NC
COM
NO
M
a
in
R
e
la
y 1
2
3
A
u
x R
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la
y 1
2
3
K
P
P
w
r
1
2
P:\INSTALLATION INST\Access Controls\INST-921\INST-921P.vsd Rev C 04-14 Page 4
Fig. 5 Using Solid State Outputs
OUTPUT #3 LIGHTS AN LED
OUTPUT #4 LIGHTS AN LED AND SOUNDS A BEEPER EXAMPLE #1:
POWER
SUPPLY +
LED
LED
1KΩ
1KΩ
-
+
OUTPUT #3
OUTPUT #4
ELECTRONIC
BEEPER
OUTPUT #3 LIGHTS A LAMP POWERED FROM AN EXTERNAL SOURCE
OUTPUT #4 TRIGGERS A NORMALLY OPEN ALARM PANEL ZONE EXAMPLE #2:
OUTPUT #3 COM
OUTPUT #4 COM
POWER
SOURCE
OUTPUT #3
END OF LINE
RESISTOR ALARM PANEL
NO ZONE
COMMON
LOW
VOLTAGE
LAMP
-
+
OUTPUT #4
EACH
OUTPUT
100 mA
MAXIMUM
A
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s
s
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ry
T
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rm
in
a
ls
3
2
1
4
A
c
c
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T
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in
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ls
3
2
921P
Keypad
6 wires for
Keypad
2 wires for
Power
Supply
External Controller
2 wires for
Door Sensor
2 wires for
Strike Power