User guide

PM4/8/12/16 Installation and User Guide v2.2
30
microphones to be unaware of it should they fail to notice the BUSY LED.
If simultaneous announcements are made, that starting rst will take priority and
the later one will be unable to proceed. However, it will often be necessary to assign
a higher priority to one paging station in the system – typically that in a security
ofce, where it may the source of emergency announcements. In such a case, an
announcement from the high priority microphone will take precedence over any
other announcements already in progress.
See page 22 for details of how to assign priorities.
Using the analogue interface with third-party paging microphones.
It may sometimes be necessary to interface a system consisting of one or more PM
microphones to a third-party paging system which uses short-to-ground contacts
for paging access. This
implies that the host
mixer has an analogue
paging access port.
It is possible to parallel
the third-party system
with the Cloud PM
analogue interface to
the paging access port.
It is not recommended
to parallel the audio
outputs, however;
these should use either
separate mic inputs if
the host mixer permits,
or otherwise a simple
external 2-into-1
microphone mixer. A suitable
arrangement is illustrated here.
HOST MIXER
CLOUD PM
3RD. PARTY
PAGING SYSTEM
Z1
Z8
Z7
Z6
Z5
Z4
Z3
Z2
GND
Z1
Z8
Z7
Z6
Z5
Z4
Z3
Z2
GND
Z1
Z8
Z7
Z6
Z5
Z4
Z3
Z2
GND
PAGING
ACCESS PORT
AUDIO IN
AUDIO OUT
AUDIO OUT
CLOUD PM
INTEGRATING PM UNITS INTO
3RD. PARTY PAGING SYSTEMS
CAN
PORT IN
CAN
PORT OUT
CAN
To Further PM Devices
PORT IN