E
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1

- INSTRUCTIONS -

The Door Com system (LDC) is a simple open voice door answering and internal All Call intercom system.
A 2-stroke chime is heard when the door station button is pressed, and can be answered from any inside
station by pressing the door "Talk" button. An internal "All Call" announcement can be made from any
inside station by holding down the "All Call" button. The chime tone can be turned off or adjusted to three
volume levels. The All Call can be muted at any station. Door release can also be included.
Up to 6 inside stations can be included in one system.
WIRING DIAGRAM:
~
~
+
E/-
DA
C
P2
LE-D
ACC-3/A
+
-
E
DA
C
R
P2
L
LDC-1C/A
RY-PA BlkYel
Door
Strike
LDC-S/A DOOR COM SET

Door Chime & Answering, All Call Communication System

LDC-1C/A

ACC-3/A

LDC-S: DOOR COM SET, includes 3 LDC-1C/A Inside Stations, 1 LE-D Door Station,
1 ACC-3/A Adaptor, and 1 PT-1210N Transformer.
Individual Components for Door Com System:
LDC-1C/A: Inside station for door answering, All Call, and door release. Includes chime volume
control, voice volume control, and All Call mute button.
LE-D: Surface mount door station, weather resistant. Flush mount LE-DA with stainless steel cover
may be used in place of LE-D. Brass and Antique brass covers are available for the LE-DA.
ACC-3/A: All Call Chime Adaptor, with 3W of output and capable of controlling up to 6 inside stations.
PT-1210N: 12V AC Transformer, 830mA, plug-in style
RY-PA: 12V DC Relay, 1A, "Normally Open" contacts, required for door release
EL-9S: Electric Door Strike, 12V AC, 300mA
MOUNTING: LDC-1C TERMINAL DEFINITIONS:
LE-D: Surface mount to 1-gang box or ring. +Positive 12V DC
-Negative
ECommon Communication
LDC-1C/A: Flush mount with BBX-1E rough-in box, DA Door Answering and Communication
or cut hole in wall 6-1/8" H x 3-3/4" W.CChime and All Call Receive
ROccupied Circuit
ACC-3/A: Surface mount to 1-gang box or ring. P2 All Call Transmit
Locate near transformer (out of sight). LDoor release Activation (jumper to P2)
PT-1210N
If 8 conductors are available, run
"L" wire separately. If using 7
conductors, jumper L to P2 for
Door Release.
Wire additional
inside stations
the same as
shown here.
Special
Order
Products
AC 12V
IN
Leave
jumper
intact.
DC 12V OUT
Pg. 1
LDC-1C/A LDC-1C/A
+
-
E
DA
C
R
P2
L
+
-
E
DA
C
R
P2
L
IMPORTANT:
LDC-1C/A stations are not compatible
with previous LDC-1C stations.