ELK 930 Specsheet

Doorbell & Telephone Ring Detector

ELK-930

The ELK-930 performs three functions. It can
detect ring activation from one or two doorbell
buttons and a single telephone line. It conveniently
isolates the voltage and current and produces
an open collector (pull to ground) output which
can be used to trigger an automation controller,
relay, timer, etc. The circuit is pre-scored so that
the individual detectors may be snapped off
(separated) from each other. 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. 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.

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.

• Small, Compact Size.

• Double Sided Foam Tape Provided For Mounting.

• Packaged in Reusable Poly Storage Box.

• Lifetime Limited Warranty.

Specications

• Max Input on Doorbell Boards: 24 Volts A.C. Nominal.

• Max Output: 40 mA @ 12 Volts D.C.

• Doorbell Detection Current: 900 mA min.

• Size: 3.4” x 2.75” x .625”.

PO Box 100 • Hildebran, NC 28637 • 800-797-9355 • 828-397-4200
Fax [phone] • www.elkproducts.com • [e-mail]