Chamberlain EL MODELS User Manual
Page 13
Wiring to an Internal Phone System
Wiring to an Internal Phone System
The units can be wired to any Analog Trunk in an internal home phone system.
NOTE: Installation where fiber optic phone lines are present may require additional modifications from your
telephone provider. Contact your provider for more information.
telephone provider. Contact your provider for more information.
IO Output Board
LED 2
LED 1
RELAY 1
RELAY 2
RELAY 3
RELAY 4
J3
J5
J4
J1
NO
NC
C
NO
NC
C
NO
NC
C
NO
NC
C
LED 4
LED 3
RES
TELCO
J6
J8
Tip
Ring
Use 18-24 AWG
2 twisted pair
Analog
Trunk
Telco Entrance Box
Demarcation Point
Internal
Phone System
Ring
Tip
EX 1
EX 3Analog
EX 4
2
T
R
Tip
Ring
Never run Telco wires and High
Voltage wires in the same
conduit. The high voltage wires
may interfere with the Telco
wires, possibly causing the
system to malfunction.
Voltage wires in the same
conduit. The high voltage wires
may interfere with the Telco
wires, possibly causing the
system to malfunction.
Single Unit
Multiple Units (Up to 7)
IO Output Board
LED 2
LED 1
RELAY 1
RELAY 2
RELAY 3
RELAY 4
J3
J5
J4
J1
NO
NC
C
NO
NC
C
NO
NC
C
NO
NC
C
LED 4
LED 3
RES
TELCO
J6
J8
Tip
Ring
Tip
Ring
IO Output Board
LED 2
LED 1
RELAY 1
RELAY 2
RELAY 3
RELAY 4
J3
J5
J4
J1
NO
NC
C
NO
NC
C
NO
NC
C
NO
NC
C
LED 4
LED 3
RES
TELCO
J6
J8
Tip
Ring
Tip
Ring
Use 18-24 AWG
2 twisted pair
IMPORTANT: You must program the unit
ID's for each unit wired in the series. See
Keypad Programming Manual.
ID's for each unit wired in the series. See
Keypad Programming Manual.
Unit ID 6
Output Board
(See page 6)
Unit ID 7
Output Board
(See page 6)
To next unit (Unit ID 5 then
4 etc.) (Unit ID 1 is farthest away
from Telco Box)
Analog
Trunk
Telco Entrance Box
Demarcation Point
Internal
Phone System
Ring
Tip
EX 1
EX 3Analog
EX 4
2
T
R
Tip
Ring