User guide

DCM-1 User Manual v1.0
Installation
24
CDPM Terminations
The rules that apply to terminating a network of CDR-1
remote control panels also applies to multiple CDPM paging
microphones. The DCM-1 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 DCM-1 and the microphone.
If two or more microphones are daisy-chained to the
DCM-1’s IN socket, terminations must be ON at the
DCM-1 and the “end” microphone only.
If two DCM-1s are daisy-chained using the IN and
THRU connectors, terminations at the “ends” of the
chain should be ON. In the example shown above, this
will be at the paging microphone and DCM-1 #2. The
termination in DCM-1 #1 should be set to OFF (as it is
in the “middle” of the chain).
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•
•
Refer to the CDPM Setup and Installation Guide (supplied
with each CDPM) for information on setting the buss
termination in the microphones.
The DCM-1’s CDPM buss termination is set by the internal
jumper J2. The termination is set ON when the jumper is
in place. Remove it to set the termination OFF. See also
page 51.
CDPM DC power
The DCM-1 can supply DC to power one CDPM 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
DCM-1’s CDPM IN port is self-powered, or powered
from elsewhere in a CDPM system, this jumper should be
removed. See page 53 for details of PSU and current ratings.
Adjusting paging levels
Separate controls are available at the rear panel for setting
CDPM microphone sensitivity and the paging level sent to
each Zone. Full details on adjusting these can be found at
page 44.
Cloud CDPM Paging Microphones
The DCM-1 fully supports the Cloud Paging Interface Buss
implemented across the CDPM range.
Connections and wiring
The DCM-1 is equipped with two RJ45 sockets for
connection of Cloud CDPM paging microphones. The
sockets are labelled IN and THRU. CDPM paging
microphones are similarly equipped with two RJ45 sockets,
labelled IN and OUT.
If the system being installed includes one microphone, its
OUT socket should be connected to the IN socket on the
DCM-1.
If the system requires more than one microphone, the
additional microphones should be “daisy-chained” together.
For example, two microphones would be wired by
connecting the OUT socket of one to the IN socket on the
DCM-1 as above, and then connecting the OUT socket of
the next microphone to the IN socket of the rst.
The diagram on the right illustrates the various methods
of connection. Note that the third example illustrates the
method of interfacing a CDPM-16 to two DCM-1s. In this
case, the CDPM THRU connector on the rst DCM‑1 is
connected to the IN on the second, and the CDPM Zone
Offset of the second would be set to 8. This would allow it
to correctly interpret commands from paging buttons 9-16
on the CDPM-16. See page 34 for full details of how to set
the CDPM offset.
NOTE: The CDPM THRU connector is only intended for
connection of additional DCM-1 units, not for additional
CDPM paging microphones.
CDPM paging microphones can be connected to the DCM-1
and each other using standard CAT-5 cable. If crimping RJ45
plugs to install cabling, use the pinout on page 54. A full
pinout of the CDPM Paging Interface Buss can be found in
the appendix at the end of this manual.
IN
OUT
OUT
CDPM
IN
THRU
DCM-1
OUT
OUT
Termination ON
Termination ON
Termination OFF
CDPM
IN
THRU
DCM-1
CDPM
IN
THRU
CDPM
IN
THRU
DCM-1 #2
DCM-1 #1
Termination ON
Termination
ON
Termination ON
Termination OFF
Termination
ON
Connecting Paging systems