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DCM-1 User Manual v1.0

Conguration

Extension Ports

The Extension Ports cannot be paralleled, but this is unlikely

to be a system requirement as the use of remote line

input plates (LE-1s and BE-1s) will be limited to the Zones

in which they are located. They will thus be wired to the

Extension Ports on the DCM-1 feeding those Zones, and not

to any other.

Mic Inputs

ME-1 remote mic input plates cannot be paralleled to

multiple DCM-1s, but their use will also be limited to the

Zones where they are installed. Any ME-1s in a system

should be connected to the Mic Inputs of the DCM-1

feeding the Zones where they are located.

Zone Outputs

Each DCM-1’s Zone outputs will feed a separate set of

power ampliers for those Zones. Thus in the example

shown, DCM‑1 #1’s outputs will feed the ampliers driving

the loudspeakers located in Zones 1 to 8, while DCM-1 #2’s

outputs will feed the ampliers driving the loudspeakers

located in Zones 9 to 16.

CDR-1s

Using more than one DCM-1 in a system does not greatly

compromise the exibility of CDR‑1 network wiring.

The Installation section of this manual gives examples of

the various wiring topologies which may be adopted (see

page 19); that used in any particular installation will be

dictated by building layout and wiring convenience.

The example above shows two chains of CDR-1s – called

‘network A’ and ‘network B’ for reference, connected to two

of the CDR-1 Ports on DCM-1 #1, one to PORT A, the

other PORT B. Only one CDR-1 interconnection is needed

between multiple DCM-1s. Either of DCM-1 #1’s two

remaining ports may be used to connect the CDR network

to DCM-1 #2, and any of DCM-1 #2’s four ports may be

used. In the diagram, the second PORT A socket on DCM-1

#1 is connected to one of the PORT A sockets on DCM-1

#2. In this case, the PORT A CDR-1 termination would be

set OFF in DCM-1 #1 and ON in DCM-1 #2. The PORT

B termination would be set ON in DCM-1 #1, and the

corresponding jumper setting in DCM-1 #2 is unimportant.

It is important to recognise that the CDR-1s on each of the

two chains in this example can be anywhere in the building,

in any Zones.

So that any CDR-1 in this system is assignable to any of

the 16 Zones, the CDR-1 Zone Offset function must be

set to +8 on DCM‑1 #2. This is set in the menu system; see

page 34 for full details. With this setting made and the two

DCM-1s interconnected as shown, all CDR-1s in the system

will offer all 16 Zones in their ASSIGN ZONE function when

CDR-1 Installer Mode is activated (see page 45).

The restriction placed on CDR-1 network wiring by multiple

DCM-1s results from the necessity of using one CDR-1 Port

on DCM-1 #1 to route the network through to DCM-1 #2.

In the example shown, the building network wiring would be

limited to six chains, three on each DCM-1.

It should be recognised that neither a CDR-1 network

interconnection between multiple DCM-1s, nor the use of

CDR Offsets may be necessary at all, if a network topology

can be installed which limits the CDR-1s on any one chain

to Zones which are being controlled by a single DCM-1.

Thus in the example, if the CDR-1s in Zones 1 to 8 were

on a single chain, and those in Zones 9 to 16 on another, the

rst could be connected only to DCM‑1 #1 and the second

to DCM-1 #2, providing a simpler wiring system.

When planning the CDR-1 network, the DC power supply

capability of each DCM-1 must also be taken into account.

As each DCM‑1 can only supply sufcient current to

operate 8 CDR-1s, it may be that an external PSU(s) will be

required at some position(s) in the chain(s) when multiple

DCM-1s are being used. Although interconnecting two

DCM-1s as shown in the example permits full access to all

zones in operation, it does not mean that 16 CDR‑1s can be

was connected to a single chain of 16 CDR-1s (with Port B

being ignored), an external PSU would need to be added to

the chain at the CDR-1 #9, to power the “farthest” 8

CDR-1s.

CDPM

In order for a CDPM system to access all 16 Zones, the

two DCM-1s should be interconnected as shown, with the

CDPM THRU connector of DCM-1 #1 connected to the

CDPM IN of #2. The CDPM termination in CDM-1 #1

should be set OFF, and that in DCM-1 #2 should be set ON.