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Conguration

DCM-1 User Manual v1.0 49

If an installation requires more than 8 Zones, multiple

DCM-1s may be interconnected to provide a system with

a larger number of outputs. For example, 2 DCM-1s will

provide 16 zones, 3 DCM‑1s 24 zones, and so on.

System Interconnections

In order to provide a transparent system which can be

operated with the same ease as one with a single DCM-1,

interconnections between multiple DCM-1s must follow a

few rules. The range of possibilities afforded by using multiple

DCM-1s is extremely large, and each installation will be

guided by the user’s requirements and the building layout.

The example given is for a simple 16‑zone system

comprising 2 DCM-1s, with a CDR-1 in each of the 16

zones. The block diagram below shows how the various

inputs are – or are not – interconnected. All possible

connections have been depicted, though it is recognised

that most systems will not use all of a DCM-1’s connectivity

simultaneously.

Line Inputs

It will generally be possible to directly parallel the outputs

of music sources to the Line Inputs of several DCM-1s using

suitable junction boxes or adaptors. Installers should satisfy

themselves that the the output of each music source is not

reduced in level or frequency response by such a multiple

connection; for most equipment, ve is the upper limit of

unbalanced inputs which can be paralleled in this way.

A more satisfactory solution is to use a stereo audio

distribution amplier (DA) for each source, with as many

outputs as the number of DCM-1s being fed. Connect the

amplier input to the source and the outputs to the same‑

numbered input of each DCM-1.

DCM-1 #1

INPUT 1

INPUT 6

INPUT 4

INPUT 8

INPUT 2

INPUT 7

INPUT 3

INPUT 5

CDPM

MIC 1

MIC 4

MIC 2

MIC 3

PAGING MIC

PAGING ACCESS

ZONE 5

ZONE 3

ZONE 2

ZONE 6

ZONE 8

ZONE 4

ZONE 7

ZONE 1

EXT 1

EXT 4

EXT 3

EXT 2

THRU

MUSIC MUTE

RS232

DCM-1 #2

INPUT 1

INPUT 6

INPUT 4

INPUT 8

INPUT 2

INPUT 7

INPUT 3

INPUT 5

CDPM

MIC 1

MIC 4

MIC 2

MIC 3

PAGING MIC

PAGING ACCESS

ZONE 5

ZONE 3

ZONE 2

ZONE 6

ZONE 8

ZONE 4

ZONE 7

ZONE 1

EXT 1

EXT 4

EXT 3

EXT 2

THRU

MUSIC MUTE

RS232

ZONE 5

ZONE 3

ZONE 2

ZONE 6

ZONE 8

ZONE 4

ZONE 7

ZONE 1

ZONE 13

ZONE 11

ZONE 10

ZONE 14

ZONE 16

ZONE 12

ZONE 15

ZONE 9

See note

in text

MUSIC SOURCES

1 TO 8

REMOTE LINE

INPUTS IN ZONES

1 TO 8

REMOTE LINE

INPUTS IN ZONES

9 TO 16

REMOTE MIC

INPUTS IN ZONES

1 TO 8

REMOTE MIC

INPUTS IN ZONES

9 TO 16

FROM THIRD

PARTY PAGING

SYSTEM

FROM CDPM

CDR-1 NETWORK A

CDR-1 NETWORK B

RS232 A

RS232 B

SPLITTER

CDR-1 PORTS

PORT A PORT B

CDR-1 PORTS

PORT A PORT B

Two DCM-1 Units forming a 16 Zone system

Larger systems – cascading DCM-1s

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 67 68

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Cloud DCM-1 User's Guide Page 51

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