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CHIME WIRING INSTRUCTIONS

READ & SAVE THESE INSTRUCTIONS!

Musical Door Chime

MODEL LB-55
MODEL LB-60 PROGRAMMABLE CHIME

This musical door chime may be connected to a NuTone

Radio-Intercom System to provide the intercom speakers
with the chime tones. If it is acceptable to have the chime
tones 

override

the radio and intercom (chime heard as well

as radio and intercom,) connect chime to intercom as shown
on the primary instruction sheet for the chime. If you wish the
radio and intercom to be 

muted

(silenced) when the chime 

is playing, the connections between the chime and intercom
must be as shown here. If you wish the 

door speakers,

as

well as the inside/patio speakers to receive the chime, see
pages 2 and 3 for wiring information.

*SPECIAL NOTE: In IMA-806 systems connected for

MUTING as shown in this page and page 4, it should be
considered that music will remain muted after a chime
tune completion – until either an “END CALL” switch is
pressed or the automatic end call timer resets the IM-806
control circuit.

COMMON
(CENTER)

INPUT

(COPPER)

1

2

I-COM

EXT.
SPKR.

I-COM
CONTROL

100 OHM
RESISTOR

CHIME

INTERCOM

MASTER

CHIME

CHIME

INTERCOM 

MASTER

METAL
CHASSIS
GROUND
SCREW

CHIME

BLACK

1

2

2

I-COM

EXT.
SPKR.

I-COM
CONTROL

100 OHM
RESISTOR

CHIME

CHIME

N2510

YELLOW 
OR BRN/ 
YELLOW 
PAIR

CHIME

ANY 

BLK/WHT

1

2

2

I-COM

EXT.
SPKR.

I-COM
CONTROL

22K OHM
RESISTOR

GROUND

REMOTE 

HOOK-UPS 

(BLK)

1

2

I-COM

EXT.
SPKR.

I-COM
CONTROL

6800 OHM
RESISTOR

CHIME

IM-806

EXT.
CHIME

* SEE SPECIAL NOTE

}

EXT.
CHIME

CHIME

IMA-516

RED/WHT

CHIME

BLACK

1

2

2

I-COM

EXT.
SPKR.

I-COM
CONTROL

100 OHM
RESISTOR

CHIME

COMMON
(CENTER)

INPUT

(COPPER)

ORANGE

WIRE

(PLUG P1,

PIN 7)

1

2

I-COM

EXT.
SPKR.

I-COM
CONTROL

100 OHM
RESISTOR

DOOR SPEAKER CONTROLLED BY “DOOR ON/OFF” 
SWITCH ON IMA-203 MASTER

MODEL IMA-303, IMA-323, OR IMD-313

MODEL SM-428 OR IMA-406

MODEL IM-806

MODEL IMA-516

MODEL IMA-203

MODEL N2510 (2500 SYSTEM)

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