ELK 941 User Manual

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For more information contact your local Distributor or:
ELK PRODUCTS,INC 828-397-4200 FAX [phone]

http://www.elkproducts.com Email: [e-mail]

05/02

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®

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Rust Free Sirens / Speakers

Speakers & Sirens

ECHO™ Sirens & Speakers

Siren & Voice Drivers

Surge Suppressors

Relay Modules

Power Products

Accessories

Alarm Output

Director

ELK-941

APPLICATION:

The ELK-941 separates the steady or pulsing
voltage from a
this into
tional jumper configures Relay 2 to pulse in a
temporal-code pattern which meets ANSI Stan-
dard S3.41. The input trigger can be either posi­tive or negative (pull to ground).

Alarm Output

Director

ELK-941

FEATURES

•Separates Steady and Pulsing Voltage From

a Single Alarm Output and Directs This Into
Two (2) Different Relay Outputs.

•Positive or Neg. Low Current Trigger.

•Two (2) SPDT Relay Outputs.

•Ideal For Two (2) Channel Long Range Radio

or Cellular Transmitters.

•Option For Temporal Pulse On Relay 2.

•Low Current Output During Delay Time.

•LED Indication of Relay Status.

SPECIFICATIONS

•Operating Voltage: 12 Volts D.C.

•Input Trigger Voltage: 9 - 14 Volts D.C.

•Input Trigger Current: 15 mA.

•Max. Current: 96mA (both relays on).

•Relay Contact Rating: 7A @ 30Vdc.

•Valid Pulse Width: .1 - 4 sec. (.125-5Hz).

•Size: 4.4" x 3" x 1.15".

•Meets ANSI S3.41Audible Emergency

Evacuation Signals 3-Pulse Pattern.

Features and Specifications subject to change without notice.

PO Box 100 • Hwy. 70W • Hildebran, NC 28637 • USA

Instructions Printed On Inside

single alarm output and directs

two (2) different relay outputs. An op-

828-397-4200 Voice
828-397-4415 Fax
http://www.elkproducts.com
email: [e-mail]

OVERVIEW

The ELK-941 separates the steady and pulsing voltage
from a single alarm output and directs this into two (2)
different relay outputs. Steady and pulsing voltage
logic is available from most controls that provide only a
single alarm output. The relays on the ELK-941 are
activated according to the trigger input, following a 3 to
4 second verification time delay. Relay 1 will activate if
a steady input is verified, or Relay 2 will activate if a
pulsing input is verified.

Optional Jumper Descriptions

J1 RELAY MODE
TEMPORAL: In the TEMPORAL position, Relay 2

will be switched on and off in a 3 pulse pattern
(3 half-second pulses followed by a 1-1/2
second pause) whenever a pulsing input is
detected. This setting has no effect on Relay 1
(it will always be steady).

[+12V] Connect to the positive (+) side of a 12 Volts D.C.

power source. Nominal operating range is 9 to 14
Volts D.C.

- GND]Connect to the negative (-) side of a 12 Volts D.C.

[

power source.

[

TRG] A positive 9 to 14 Volts D.C. input or a neg. (pull to

ground) to this terminal will activate the ELK-941.
The polarity of the trigger voltage must be
selected using jumper J3. The input trigger can

be from a contol panel's single alarm output, or from
another source such as an automation controller/
timer, a simple pushbutton switch, etc.

OUTPUT CONNECTIONS

[-P] "Pre-activation" Output (30mA MAX). This is active

immediately following the application of a trigger
input for 3 to 4 seconds while the ELK-941 verifies
whether the input is steady or pulsing. Upon

determination of steady or pulse, the appro­priate relay will activate and this output will
cease. Note: If the trigger input is pulsing, this

output will also pulse.

[N/O ] Relay 1 Normally Open contact. This terminal is

connected with the COM terminal whenever the
relay is ON (activated).

[COM] Relay 1 Common contact. This "pole" or switching

part of the relay is connected to the N/O terminal
when the relay is ON (activated), and to the N/C
terminal when the relay is OFF (at rest).

[N/C] Relay 1 Normally Closed contact. This terminal is

connected with the COM terminal whenever the
relay is OFF (at rest).

[N/O ] Relay 2 Normally Open contact. This terminal is

connected with the COM terminal whenever the
relay is ON (activated).

[COM] Relay 2 Common contact. This "pole" or switching

part of the relay is connected to the N/O terminal
when the relay is ON (activated), and to the N/C
terminal when the relay is OFF (at rest).

[N/C] Relay 2 Normally Closed contact. This terminal is

connected with the COM terminal whenever the
relay is OFF (at rest).

INPUT CONNECTIONS

STEADY: In the STEADY mode, Relay 2 will be

steady (solid) when a pulsing input is detected.
IMPORTANT NOTE: With Jumper J1 in the

STEADY position, the ELK-941 will provide
dual mode latch, whereby if a steady input
activation is followed by a pulsing input or
visa-versa, both relays will activate and stay
on until the trigger input is completely
removed. If the ELK-941 is used to activate a
long range radio or other communications
device, this feature prevents restoral signals
from being transmitted until both conditions are
resolved.

J2 IMMEDIATE OUTPUT
When an input trigger is first applied, the ELK-941

requires a 3 to 4 second verification time delay to
determine if the input is steady or pulsing. If a siren
is connected, it may be desirable to immediately
activate one of the relays during this delay time.
Such uses include closing ring-back, siren test upon
arming, etc. Jumper J2 selects which relay will
activate (if any) during this time. If Relay 1 or 2 is
selected for immediate output, the selected relay will
"follow" the trigger. ie: If the trigger is steady, the
relay will be steady. If the input is pulsing, the relay
will pulse. Once the ELK-941 has verified what type
of input is being applied, the appropriate relay will
then be activated (which may or may not be the same
relay that was selected for immediate output).

RELAY 1: With the jumper in this position Relay 1

will turn on during the verification time delay.

RELAY 2: With the jumper in this position Relay 2

will turn on during the verification time delay.

OFF: With the jumper in this position neither Relay

will turn on during the verification time delay.

Note: The -P terminal can be used to trigger a piezo

or other low current device for audible or visual
needs. If the trigger input is pulsing, this
output will also pulse. The position of jumper

J2 has no effect on the -P terminal.

J3 TRG (Trigger Polarity)

This jumper bar is used to set the proper input trigger
polarity.

+ Set J3 to "+" if the ELK-941 will be triggered by

a positive voltage input.

- Set J3 to "-" if the ELK-941 will be triggered by

a negative (pull to ground).