User guide

Appendix
DCM-1 User Manual v1.0 53
3) Enable/Disable Groups
Zone membership of Groups must rst be dened in the
menu system (at GROUPS > GROUP MEMBER).
The value of z in the general format is the Group No.
(1 to 4).
EXAMPLE COMMAND
Enable Group 3 ASCII <G3,E/>
HEX 3C 47 33 2C 45 2F 3E
Disable Group 1 ASCII <G1,D/>
HEX 3C 47 31 2C 44 2F 3E
4) Enable/Release Paging
RS232 control of paging applies only to 3rd.-party paging
systems connected to the Paging Mic Input.
This command differs from the others in that the value of y
in the general format is in the form of an 8-character mask
of ASCII “X’s” (select) and “O’s” (don’t select), with the
character position in the mask denoting the Zone number.
EXAMPLE COMMAND
Enable paging
to Zone 2
ASCII <PM,PAOXOOOOOO/>
HEX 3C 50 4D 2C 50 41 4F 58 (4F 4F 4F 4F 4F 4F)
2F 3E
Enable paging
to Zones 4
to 7
ASCII
<PM,PAOOOXXXXO/>
HEX
3C 50 4D 2C 50 41 4F 4F 4F 58 58 58 58 (4F)
2F 3E
Cancel paging ASCII <PM,PR/>
HEX 3C 50 4D 2C 50 52 2F 3E
Note that it is not strictly necessary to transmit the “O”
character (4Fh) for channel numbers above the highest being
paged. Thus <PM,PAOX/> (ASCII) would sufce in the rst
example above, and <PM,PAOOOXXXX/> in the second.
However, the full eight characters are shown in the table for
completeness, with the extra characters in brackets in the
hex version.
PSU capability
In addition to supplying the DCM-1’s internal circuitry,
the PSU has the capacity to power some additional items
which may form part of a complete system. These include
CDR-1 remote control panels, remote mic and line input
plates, CDPM microphones and any level restoration relays
which may be connected at the Paging Access Connector in
Output mode.
The maximum current capacity of the PSU available for
powering external items is 650mA on each of the +12v
and ‑12v rails. This should be used as the guide gure when
calculating whether any external PSUs will be required in a
system. Additionally, there is a limit on the current which can
be fed through the CDR-1 POWER IN and POWER OUT
connectors; only 8 CDR‑1s can be powered from the four
CDR-1 Ports, even though their current requirement is less
than 650mA.
Current consumption of the various items is listed in the
table below.
ITEM
CURRENT
@ +12V
CURRENT
@ -12V
MAX.
NO.
CDR-1 remote control panel 50mA nil 8
CDPM-8 paging microphone 83mA nil 1
CDPM-16 paging microphone 107mA nil 1
BE-1 remote line input plate (bal.) 24mA 24mA
LE-1 remote line input plate 22mA 22mA
ME-1 remote mic input plate 43mA 43mA
Restoration relays (see below) Nil
The installer should ensure that the total current drawn by
all the external items in a system does not exceed 650mA.
If the Paging Access connector is being used as an output to
operate level restoration relays (either directly or indirectly
– see page 24), the current taken by the relay coils must also
be taken into account. The open-collector outputs at this
connector are limited to 60mA per zone.
If the total current required by external items does exceed
650mA on either rail, additional PSUs will need to be added
to the system. The Cloud CPM-PSU is suitable for powering
CDR-1 remote control panels and CDPM microphones and
can be readily interfaced with the respective networks.
PSU performance will be degraded at ambient temperatures
in excess of 35
O
C.