90102 0610
C-123LW Supplemental Instructions
Dual Master ChimeCom System
- REFER TO INSTALLATION MANUAL INSIDE C-123L/A BOX FOR STANDARD
INSTALLATION INFORMATION -
The C-123LW Dual Master ChimeCom set provides chime, communication, and door release for one door and two
inside locations. This supplemental instruction manual addresses many of the additional functions and modifi cations
for the Chime Com system, including installation and troubleshooting information.
MASTER STATION:
C-ML/A: Master station with door release button (Normally Open)
COMPATIBLE DOOR STATIONS:
C-D Surface mount, included in C-123L/A and C-123LW kit
LE-D Surface mount, plastic door station (replacement for C-D)
LE-DA Flush mount in 2-gang box, stainless steel cover
LE-SS-1G Vandal resistant, 1-gang fl ush mount, stainless steel
LE-SS Vandal resistant, 2-gang fl ush mount, stainless steel
LE-SSR Vandal resistant, 2-gang fl ush mount, stainless steel, red mushroom button
LS-NVP/C Vandal resistant, 3-gang fl ush mount, white powder-coat fi nish
(Weather resistant, made for outdoor use)
OPTIONAL COMPONENTS & ACCESSORIES:
RY-AC/A External signaling relay (Requires 12VDC power supply)
DAK-2S Dual master adaptor kit (2component modules)
(1 kit per 2 master stations. Use 2 DAK-2S for up to 4 total master stations)
SBX-1G Surface mount box for LE-SS-1G
SBX-2G Surface mount box for LE-SS, LE-SSR, LE-DA
SBX-NVP Surface mount box for LS-NVP/C
EL-12S Door strike (for interior wood frame doors only)
PT-1210N AC 12V Transformer (used for door strike)
SKK-620B 6V DC power supply (1 per C-ML/A master)
822202 2 conductor, 22AWG, Shielded wire for up to 245’, (500’ and 1000’ boxes)
821802 2 conductor, 18AWG, Shielded wire for up to 590’, (1000’ box)
Install two separate runs of this cable, one for the intercom and one for
the door release.
C-123L/A Set
LE-SS-1G LE-DA
LE-SS
LS-NVP/C
DAK-2S
(2 component modules per kit)
DOOR RELEASE WIRES MUST BE IN A SEPARATELY JACKETED CABLE FROM THE INTERCOM WIRING.
C-D
C-123LW Set contains:
2 C-ML/A, 1 C-D, 1 DAK-2S
C-ML/A
Power source and Door Strike not included.
2 cond. shielded for intercom
SKK-620B
IMPORTANT: Connect wires
before applying power.
(or 4 “C” batteries installed in
the master). Do not use both
power sources. Ground wire
must be tied to earth ground
when using the SKK-620B.
Separate 2 conductor for door release
EL-12S, not included with the C-123L/A or C-123LW set.
Power
Source
for Strike
C-123LW Supplement
Pg. 1
WIRING DIAGRAM: Dual Master Chime Com System with DAK-2S Dual Master Adaptor
C-D
1
E
EL-12S
IMPORTANT: Connect wires
before applying power.
* Install bare wire end to the “1” terminal
(DAK-2S contains two component modules)
C-ML/A
1
Component
Module*
E
+
Please read and understand all
instructions before installation.
SKK-620B
Component
Module*
SKK-620B
L
L
IMPORTANT!!!
Each master REQUIRES an SKK-620 power supply, or 4 “C” batteries. (Do not install both on one C-ML/A.)
OPERATION NOTES:
1. Only one master can be used at a time.
2. If both masters are activated, a feedback (squeal) will be heard through the system when either TALK button is pressed.
3. If feedback occurs, wait approximately 15 seconds, or until the masters turns off automatically. At that time,
communication can continue normally.
C-ML/A
1
E
+
L
L
INSTALLATION GUIDELINES:
1. Run 2 conductor wire from the door station to the fi rst master, then continue to the second master.
2. Install the units at the desired locations. (Do not install stations back to back on opposite sides of a wall.)
3. Separate SKK-620 power supplies or four “C” batteries are required for each master station.
4. DO NOT install both a power supply and batteries at any one master.
5. Install the bare wire leg of the component module directly onto the “1” terminal of the C-ML/A’s.
6. Attach the wire coming from the “1” terminal of the C-D to the colored wire end of the component modules at both masters. (The component
modules will easily fi t inside the space available.)
7. Connect the “E” terminals between the door station and master stations.
8. If door release is included, use a separate 2-conductor wire from the “L” terminals of the masters through an AC transformer and to the door strike.
9. The EL-12S is designed for a standard wood framed door, and for light to medium usage. If a different type of door is in place, install a strike
appropriate for the door.
10. The door release button on the master station is a “Normally Open” contact closure for an electric strike. See page 3 for modifi cation to “Normally
Closed” if a magnetic lock is used.
4 C-ML/A Master Stations with 1 Door
C-D
1
Component
Module
E
C-ML/A C-ML/A
1
E
1
Component
Module
E
Note: In a multi-master system, all masters only talk to the
door station, and only one master can be on at a time
C-ML/A
1
E
Component
Module
C-ML/A
1
Component
Module
E
SKK-620B
C-123LW Supplement
Pg. 2
SKK-620B
+
-
+
-
SKK-620B
+
-
SKK-620B
+
-
WIRING DIAGRAM: LEM-1DL System with External Signaling using RY-AC Relay
C-D
1
E
NOTE: Negative of
power supplies must be
tied together.
Normally Open Dry
Contact to door
strike and power
Component
Module*
SKK-620B
C-ML/A
1
IMPORTANT: Connect wires
before applying power.
E
12V DC power
supply
+
L
L
To 1 of C-D and
WHITE wire of RY-AC
+
-
Component Module*
If a DAK-2S is not available, install components as shown below.
Capacitor: 25V, 15-33ufd Non-polarized
Diode: 1N4148
White
Red
Black
Output of RY-AC (Yellow
wires) provide a momentary
dry contact closure while
the call button on the door
station is being pressed.
BELL
RY-AC
Power source
for bell
To 1 of C-ML/A
MODIFICATION INSTRUCTIONS:
C-ML/A with Door Release contact Modifi ed to Normally Closed (for Magnetic Lock)
C-ML/A Rear View with PC board removed.
Magnetic locks require Normally
Closed contacts, keeping power
applied to the magnet to keep the door
locked, and breaking power to release
the door. These instructions explain
how to change the contact in the
C-ML/A to Normally Closed.
1. Remove back chassis of C-ML/A
and move the PC-754 board aside.
Black door release switch will be
visible.
2. On the switch, move* the wire from
the NO contact (middle position) to
the NC contact (top position).
*Desoldering and resoldering is
required.
3. This modifi cation will change the
door release button’s function to
Normally Closed, to be used with
magnetic lock device.
4. Switch contact rating is 1A at 50V
AC.
547
THA1
8
60H-2
A
Door release
switch
NC
NO
COM
+-
C-123LW Supplement
Pg. 3
INSTALLATION TIPS:
1. Use shielded wire for the communication path, and ground one end of the shield to an earth ground.
2. Run intercom wire at least 20” away from AC wiring, fl uorescent lights or dimmer switches.
3. Keep intercom cable away from alarm, data, phone, video cables, and any other potential source of
interference.
4. Door release wires must be in a separately jacketed cable from the intercom wires. Use two separate
cables; one for audio and one for door release.
5. When installing a second master station, wire must be run from the fi rst master station, not from the
door station. See diagram on page 2.
6. Do not install the master station near light switches, dimmer switches, or other devices that may cause
interference with the intercom system.
7. Do not install the master station on the opposite wall from the door station. If the units are too close,
acoustical feedback may result.
TROUBLESHOOTING GUIDE:
PROBLEM
No call in from door to master, but
communication works fi ne.
When the talk button is pressed, the other
master rings.
When the talk buton is pressed, feedback is
heard at both masters. Common power supply.
Unit appears dead; No functionality Terminals 1 and - crossed
System squeals and batteries get hot
Chime tone sounds weak, low frequency Weak batteries or low voltage.
Master stays on; does not time out.
Voice volume is too loud or too soft.
Chime tone volume is too loud.
RY-AC external signaling relay not working. Missing or wrong connection.
POSSIBLE CAUSE
Reversed DAK-2S component module.
Missing or reversed DAK-2S
component module.
Power supply and batteries both
installed.
Incorrect cable being used.
Volume control not adjusted properly.
Standard volume level.
SOLUTION
When door calls in, it shorts the #1 terminal to the E terminal.
If the DAK-2S is installed backwards the chime from the
door call-in will not be heard. Install the DAK-2S component
module with the bare wire under the 1 terminal, and the door
station 1 wired to the colored wired end of the DAK-2S.
Install the DAK-2S component module as described above
and shown on the dual master instructions.
If both C-ML/A’s share the same power supply, a ground loop
feedback will occur when the talk button is pushed. Install a
separate power source for each master.
+/- are on left column, E/1 are on right column. If swapped,
unit will appear dead. Verify that 1 from the door station is
connected to 1, and negative of power supply is connected to -.
Take batteries out of the master station. Both power sources
cannot be used simultaneously.
If batteries are installed, replace them. If using a power
supply, check for 6VDC. If low, install a new SKK-620.
If the resistance of the wire is too great, usually from
exceeding distance limitations, the master may not time out as
designed. Refer to wire specifi cations in the instructions.
Remove front cover of the C-ML/A and locate volume
potentiometer through hole at bottom of unit. Use a small
screwdriver to adjust the volume, clockwise to increase.
There is not a separate call tone volume adjustment on the
C-ML/A so the volume level cannot be altered. Surface mount
component level modifi cation would be required, which is not
paractical
Make sure the negative from the 12VDC supply for the RY-AC
is connected to the negative of the C-ML/A master. Make sure
the WHITE wire of the RY-AC is connected to the DAK-2S
component module to terminal 1, not negative terminal.
Aiphone Communcation Systems
1700 130th AVE N.E.
Bellevue, WA 98005
(425) 455-0510
FAX (425) 455-0071
Toll Free Technical Support:
1-800-692-0200
E-mail tech@aiphone.com
C-123LW Supplement
Pg. 4
#90102
0610JD
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