Cloud Electronics PM16 - Manual (Page 23)

PM4/8/12/16 & PM4/8-SA Installation and User Guide v1.0 23
Powering standard (non-SA) models from a Cloud host mixer
If the PM is to be connected to a Cloud host mixer, DC power may be obtained from
the mixer as long as it has a suitable power supply connection, and the spare current
capacity of the mixer is sufficient. As a general rule, a mixer cannot supply power to a
PM that has more zones than itself.
Note that if the PM is being powered from a host mixer, an external PSU should not
be simultaneously connected; in this case, the external PSU will override the current
draw from the host, and it will power the microphone instead.
There are two ways in which a PM can be supplied with DC power by a Cloud host
mixer:
1. Via the Digital Paging Interface. The CAN PORT OUT connector on the PM is
wired for power, so a PM connected to a Cloud host mixer fitted with the Digital
Paging Interface can obtain power through this connection. In systems with
multiple, “daisy-chained” PMs, it is only the “last” PM on the network - i.e., that
connected directly to the host - which can be powered in this way. See “Systems
with multiple paging microphones” on page 44 for more information.
2. Note that when using the Digital Paging Interface, the maximum recommended
cable length between the Cloud host mixer and the “last” PM should not exceed
50 m. If longer cable lengths are required, then an external PSU should be
connected to the PM.
3. Via the Analogue Port. The PM’s analogue interface allows for DC power. The
‘+V’ and ‘0V’ terminals of the internal port connector should be wired to the
‘+V’ and ‘0V’ pins respectively of the access connector at the Cloud host mixer.
This method of powering requires an additional core in the access cable (the ‘0V’
connection will need to be made in any case for the zone selection to function).
Only one microphone may be powered from the mixer in this way. The wiring
diagram on page 30 illustrates this connection.