Cloud Electronics DCM1 - Manual (Page 24)

DCM1 & DCM1e Installation and User Guide v1.0 24
IN OUT
OUT
Mixer
OUT
OUT
Termination ON
Termination ON
Termination OFF
CDPM
IN THRU
CDPM
IN THRU
DCM1 #2
DCM1 #1
Termination ON
Termination
ON
Termination ON
Termination OFF
Termination
ON
Mixer
Example 1
Example 2
Example 3
PM paging microphones can be connected to the DCM1 and
each other using standard Cat 5 cable. If crimping RJ45 plugs
to install cabling, use the pinout in page 69. A full pinout of
the PM Paging Interface Buss can be found in the appendix at
the end of this manual.
PM Terminations
The rules that apply to terminating a network of CDR-1
remote control panels also applies to multiple PM paging
microphones. The DCM1 and a set of microphones should be
considered as a “daisy-chain”, and buss terminations should
be set ON in the two devices at the “ends” of the chain,
and OFF in all others. The interconnection diagram above
indicates how these rules are applied in the various possible
wiring schemes.
•
In the simplest implementation of just one paging
microphone, the terminations should be set ON at both
the DCM1 and the microphone.
•
If two or more microphones are daisy-chained to the
DCM1’s IN socket, terminations must be ON at the
DCM1 and the “end” microphone only.
•
If two DCM1s are daisy-chained using the IN and
THRU connectors, terminations at the “ends” of the
chain should be ON. In Example 3 above, this will be at
the paging microphone and DCM1 #2. The termination
in DCM1 #1 should be set to OFF (as it is in the
“middle” of the chain).
Refer to the PM Setup and Installation Guide (supplied with
each PM paging mic) for information on setting the buss
termination in the microphones.
The DCM1’s PM buss termination is set by internal jumper
J2. The termination is set ON when the jumper is in place.
Remove it to set the termination OFF. (We suggest the
jumper is left on one of the two pins in case it is required in
the future.)
See also page 65.
PM DC power
The DCM1 can supply DC to power one PM paging
microphone. Powering of a microphone in this way is enabled
with the internal jumper J14, which is set ON as the factory
default. If the microphone connected to the DCM1’s
CDPM/
PM IN port is self-powered, or powered from elsewhere in
a PM network, this jumper should be removed. (We suggest
the jumper is left on one of the two pins in case it is required
in the future.)
See page 69. for details of PSU and current
ratings.
Adjusting paging levels
Separate controls are available at the rear panel for setting
PM microphone sensitivity and the paging level sent to each
Zone. Full details on adjusting these can be found at page 46.
Zone paging outputs
If a PM paging microphone system is the only one being used
with a DCM1, the DCM1’s
PAGING ACCESS connector
may be used to provide per-zone paging control outputs.
These can be used, for example, to activate level restoration
in 100 V line systems where local speaker volume controls
are installed. When a zone is paged from the PM system, the
control output for that zone activates (pulls down to 0 V).
The
PAGING ACCESS connector’s default configuration
is as a zone input connector for use with third-party paging
systems. Re-assignment as an output connector is made via
the menu system. See “Configure Access Connector” on page
33 for details.
The connector is a 10-way screw-terminal type. The pinout is
given in the table below:
PIN FUNCTION
1 0 V
2 Zone 1 active
3 Zone 2 active
4 Zone 3 active
5 Zone 4 active
6 Zone 5 active
7 Zone 6 active
8 Zone 7 active
9 Zone 8 active
10 +12 V