Smarthome ELK-930 User Manual
Doorbell & Telephone
SMARTHOME™ 1-800-SMART-HOME 949-221-9200
http://www.smarthome.com Order #1221
Ring Detector
FEATURES:
Doorbell
•Detects Doorbell Activation Current
•Inputs for Two Separate Pushbutton Locations
•No Interference With Lighted Pushbuttons
•Produces an Open Collector Output
•Powered by the Doorbell Transformer
Telephone
•Detects Telephone Ringing Voltage
•Provides an Open Collector Output that follows
the ringing pattern
•Lifetime Limited Warranty, call or visit our
website for details
SPECIFICATIONS:
•Max Input on Doorbell Boards: 24 Volts A.C.
•Max Output : 40mA @ 12 Volts D.C.
•Doorbell Detection Current: 900mA min.
•Total Dimensions: 3.4" x 2.75" x .625"
INSTALLATION
SMARTHOME™
1-800-SMART-HOME
949-221-9200
http://www.smarthome.com
Order #1221
The ELK-930 doorbell detector monitors the current draw of a doorbell and produces an open collector output when the
pushbutton is pressed and the doorbell draws 900mA or more. This open collector output can be used to trigger an automation
controller input that utilizes high to low switching (pull to ground) for activation. There are two basic installation methods:
Method 1 requires only 1 of the ELK-930 doorbell detectors and free access to the wires leading from the doorbell transformer.
The ELK-930 will activate when the doorbell rings, regardless of a single pushbutton or two (front door, back door) pushbuttons.
1. Mount the ELK-930 at any convenient location along the path of the two wires leading from the transformer to the doorbell.
2. Cut one of the two transformer wires. Strip the ends and place one under each of the doorbell detector INPUT terminals.
3. Run a two conductor wire from the doorbell detector output terminals to the automation controller or device to be activated.
4. Connect one wire from the "NEG" terminal to a common NEG terminal of the controller. Connect the other wire from the
"OUT" terminal to one of the input zones on the controller.
Automation
Input
Equipment
Front
Door
Input
Lighted
Doorbell
Pushbuttons
Back
Door
Negative
Method 2 requires both ELK-930 doorbell detectors and free access to both of the pushbuttons wires. Detector A will activate
when the front door pushbutton is pressed and Detector B will activate when the back door pushbutton is pressed.
1. Mount the ELK-930 near the Automation Equipment.
2. Run a four conductor wire to the doorbell location.
3. Connect one pair of the four conductor to the INPUT terminals on Detector A and the other pair to the INPUT terminals on
Detector B. At the doorbell location splice one pair of the four conductor in series between the front door wire and the
transformer common. Splice the other pair between the back door wire and the transformer common.
4. For each doorbell detector connect one wire from the "NEG" terminal to a common NEG terminal of the controller. Connect
the other wire from the "OUT" terminal to one of the input zones on the controller.
Open Collector Output
Max. rating: 12V, 40mA
DOORBELL
FRONT DOOR INPUT
BACK DOOR INPUT
TRANSFORMER
Method 1
ELK-930
Doorbell
Detector
A
INPUTOUT NEG
X
Cut and splice
ELK-930A or B
into this line
TO 120 VOLTS AC
DOORBELL
TRANSFORMER
10 TO 16
VOLTS AC
Automation
Equipment
Input 1
from Front Door
Open Collector Output
Max. rating: 12V, 40mA
Input
Negative
ELK-930
Doorbell
Detector
A
INPUTOUT NEG
Front
Door
Lighted
Doorbell
Pushbuttons
Back
Door
DOORBELL
FRONT DOOR INPUT
BACK DOOR INPUT
TRANSFORMER
ELK-930
Automation
Equipment
Input 2
from Back Door
Input
Negative
Doorbell
Detector
B
INPUTOUT NEG
4 Conductor Cable from Automation
Equipment to Doorbell Location
TO 120 VOLTSAC
DOORBELL
TRANSFORMER
10 TO 16
VOLTS AC
Method 2
The ELK-930 telephone ring detector monitors the voltage on the telephone line and produces an open collector output
(pull to ground) when the telephone ringing voltage is approximately 50 Volts or greater. The output follows the ringing pattern.
Automation
Equipment
Input
Negative
Open Collector Output
Max. rating: 12V, 40mA
TELEPHONE
RING
DETECTOR
ELK-930
C
ROUT NEG
T
Telephone
Dmark Block
To House
Phones
TIP
RING
Incoming
Telephone
Line
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