Cloud Electronics PM12 - Manual (Page 28)

PM4/8/12/16 Installation and User Guide v2.2 28
Note that there is no restriction as to the PM model which is the “last” in the chain
– i.e., that which connects directly to the mixer. All PM models support all 16 zones,
so in an extreme example, several PM16s could be daisy-chained with a PM4 as the
“last” microphone in the chain. All microphones on the system will have full access to
whichever zones are required.
See also Cables and Connections on page 16.
*The Digital Paging Interface also permits PMs to be intermixed with the older Cloud CDPM paging
microphones on the same network. Refer to the separate CDPM Installation manual for information
(available as a download from the Cloud website).
Maximum System Capability
Up to 32 PM microphones may be interconnected via the Digital Paging Interface.
Different models of PM may be mixed freely, and each may have a zone offset applied,
as required. The total CAT-5 cable run should be less than 1 km.
Power supply considerations
In a multiple-PM system, only the “last” microphone in the chain – that which
connects directly to the host mixer – may be powered from the host. Powering may
be either via the Digital Paging Interface, or the analogue interface. Alternatively, it
may be powered via an external PSU such as the Cloud CPM-PSU. See page 12
for
full details.
All other PMs on the network must be powered individually by external PSUs. DC
power is only connected internally at the CAN PORT OUT socket, so the “daisy-
chain” data/audio connection cannot be used to pass power between PM units.
Terminations
PMs are shipped from the factory with the Digital Paging Interface termination ON.
This requires no alteration in single-PM systems, but in multiple-PM systems, only the
microphone at “far end” of the network may have its termination ON; all others must
have their terminations set OFF. See page 24 for details of how to set the termination.
In all systems, the Digital Paging Interface termination must be set ON in the host
mixer. Refer to the mixer documentation for details.