Elk Products ELK-981 User Manual
Cell-Pack
T elephone Line Fault Monitor ,
Power Supply , and Enclosure
APPLICATION
The ELK-981 Cell-Pack is the ideal companion for Cellular
Alarm Transceivers. It consists of a metal enclosure, 12 Volt
DC power supply/battery charger, and a telephone line fault
monitor. It supplies 1 Amp continuous current and 2.5 Amps
peak for brief high current demands during radio
transmission. The relay contacts from the line fault monitor
can notify the alarm panel if the telephone line is cut, or they
can be used to shunt the radio transceiver as long as the
telephone line is good.
FEATURES
• Monitors Telco Voltage and Current
• Shunts Transceiver If Phone Line is Good
• Supplies 12 Volts D.C. Power
• Current: 2.5A Peak, 1A Continuous
• Heavy Duty Metal Enclosure
INSTALLATION
1. Mount transceiver in top right corner by
sliding antenna thru rubber grommet and
securing the bottom using hardware
supplied. (see page 2)
2. Wire as per the Cellular Transceiver
instructions.
3. Jumper JP1 on the ELK-981 board should
be in the "5 Sec" position.
4. Jumpers T1 and R1 should be set in the
"Telco Side" position.
5. Connect Transformer and Battery after all
wiring is complete.
RJ31X Phone Jack
ELK-950
(Sold Separately)
To Control Dialer
Connection
Transformer
16.5 VAC
45 VA
* See Note
Phone Line Fault
Output (dry contacts)
Bell / Alarm output
from control panel
OPERATION
The ELK-981 monitors both the phone line voltage and current to
detect a faulted line. This reduces the incidents of false
detects. On-hook phone line voltage is around 48 VDC. This
voltage drops when the phone is in use (Off-hook), however
the telephone instrument is then drawing current on the line.
The phone line is considered to be faulted whenever
the line voltage falls below 3 volts and the line current
draw is less than 18mA.
STATUS LED Blinking ON once per second indicates a good
phone line and testing is in process. The transceiver is shunted
by relay closure across terminals COM and N/C.
STATUS LED Steady ON indicates a phone line fault. The
relay contacts open and the transceiver is free to transmit.
STATUS LED Predominantly On (blinks off ever 3 seconds)
is a memory indication of a previous line fault. Reset by briefly
shorting the two pins located above the Status LED. The Status
LED will once again Blink On if phone line is good.
Features and Specifications subject to change without notice.
For Technical Support on the Numerex Technologies
Digicell Transceiver, call 888-987-5465.
Incoming
Phone
Line
N/C
Com
N/O
+
ELK-981
ELK-981IC Canada Version (Industry Canada)
ELK-981K Incl. Battery & Transformer (US Only)
ELK-981
Power Supply /
Telephone Line Fa ul t
T1
R1
TRANS
FORMER
16VAC
J2
J1
HOUSE SIDE
TELCO SIDE
Module
Phone Line to RJ31 / 38 Jack
Phone Line to Control
12V DC
PHONE LINE
OUTPUT
ALARM RELAY
N/C COM N/O
- +
RESET
STATUS
JP1
Refer to the Cellular Transceiver
Transceiver
Battery
J3
For Future Use
12 Volts D.C.
Power Input
+
-
* Note:
Battery (ELK-1250) &
Transformer (ELK-TRG1640)
Included with ELK-981K
Sold Separately for ELK-981
This device complies with Part 68 of the FCC rules. FCC Reg. No. 5K6USA-25252-KX-N
Ren No. 0.0B. It has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC rules.
The ELK-981IC meets the applicable Industry Canada Terminal Equipment Technical
Specifications. This is confirmed by the registration number: 4343A-ELK981IC. The
abbreviation, IC, before the registration number signifies that registration was performed
based on a Declaration of Conformity indicating that Industry Canada technical specifications were met. It does not imply that Industry Canada approved the equipment. The
Ringer Equivalence Number (REN) for this terminal equipment is 0.0B. The REN assigned
to each terminal equipment provides an indication of the maximum number of terminals
allowed to be connected to a telephone interface. The termination on an interface may
consist of any combination of devices subject only to the requirement that the sum of the
Ringer Equivalence Numbers of all the devices does not exceed five.
Black
Cellular
Alarm Transceiver
Instructio ns for Connections
Optional hookup
for Transmission
Shunt (if available)
-
Bell / Alarm
+
Red
Battery
12 Volt
* See Note
Input
-
P.O. Box 100 • Hildebran, NC 28637 USA • 828-397-4200 • 828-397-4415 FAX
http://www.elkproducts.com • email: info@elkproducts.com
03/04
Transceiver Mounting Location for this Model
Place
Plug
Here
Slide Transceiver
Over Mounting Plate
to Secure it in Place
Place
Antenna
Grommet
Here
Secure Mounting
Plate Here
Transceiver Mounting Location for this Model
Secure Transceiver
with Washer and Nut
Here
Place
Plug
Here
Place
Antenna
Grommet
Here
Place
Standoff
Here
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