Detailed instructions for use are in the User's Guide.
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Telephone Line
Fault Monitor
ELK-980
APPLICATION: The ELK-980 triggers a relay output upon sensing a dead telephone line. [. . . ] 70W · Hildebran, NC 28637 · USA
Instructions Printed On Inside
INSTALLATION
1. Connect the ELK-980 to the incoming phone jack using a standard 8 wire full modular "male to male" phone cord (J2). Depending on the equipment, this cord may be identical or it may have a male plug on one end and spade terminals on the other end. Connect two (2) wires from the relay output to the device that is to be activated when a dead phone line is detected. Option: Power and relay connections can be made using the four (4) extra wires in modular cord J1. This requires a cord with a male plug on one end and spade terminal wires on the other. This is not possible if the security equipment requires a male plug ended cord. See FIGURES 1 and 2 below for details on the various jumper options and wiring configurations.
OPERATION
A typical on-hook phone line will measure around 48 volts. The voltage is lower during a call in process (off-hook), however the telephone instrument will then draw current on the line. The ELK-980 utilizes both telco voltage and current to properly detect a faulted line while reducing incidents of false detects. The ELK-980 considers the phone line to be faulted whenever the line voltage falls below 3 volts and the line current draw is less than 18mA. Relay de-energized, contacts COM and NC are open, COM and NO are closed. [. . . ] COLOR 4 RED 5 GREEN 1 SLATE 8 BROWN 7 BLUE 2 ORANGE 3 BLACK 6 YELLOW
JP5 D7 RESET STATUS
NEG POS N/O COM N/C POWER ALARM RELAY
R1 1
2
3
R
4
J1
J2
6 5
INCOMING TELCO LINE
8 7 8 WIRE QTR. JP5: MEMORY RESET 8 WIRE FULL T1 MODULAR CABLE MOMENTARILY SHORT MODULAR CABLE (MALE TO SPADE) TO RESET LINE FAULT (MALE TO MALE) REQUIRED MEMORY
T HOUSE PHONES [. . . ]