10
PA/GA Power Management unit
SONIX Pm10 TECHNICAL mANUAL
TM365-1 / A June 2022 www.eaton.com
4.4 48 V dc power distribution
48 V dc power is generated internally by an ac to dc
power supply, switched live between the power inputs.
The output voltage is regulated to +/- 0.5% and is used
for all PA/GA system dc power needs. Total load should
not exceed 95W.
Current limit for individual 48 V dc output is 2 A,
protected by replaceable fuse located on the front panel
(see Figure 1).
When more than one Pm10 unit is being used in the
system, their 48 V dc rail can be shared between the
units. To achieve this, the Pm10 units DC outputs
are daisy-chained: 48 V dc output of the first unit is
connected to 48 V dc input of the next unit, with no limit
on how many units can be chained. The 48 V dc output
from the last unit is then used as a primary power
source for PA/GA 48 V dc with the others providing a
redundant supply
.
Warning:
If utilising the 48 V output in user
touchable equipment an isolating DC:DC power
supply is required.
O/P 1
O/P 2
O/P 3
O/P 4
O/P 5
L
+
N
+
E
L
+
N
+
E
L
+
N
+
E
L
+
N
+
E
L
+
N
+
E
Power Bus
O/P 1
O/P 2
O/P 3
O/P 4
O/P 5
L
+
N
+
E
L
+
N
+
E
L
+
N
+
E
L
+
N
+
E
L
+
N
+
E
Power Bus
48 v dc Output
to PA/GA rack
Sonix Pm10
#2
Sonix Pm10
#1
Warning: Dangerous voltages. Do not open
Warning: Dangerous voltages. Do not open
Fault
O/P
N/C com
48VDC
O/P
+ -
48VDC
I/P
+ -
Fault
O/P
N/C com
48VDC
O/P
+ -
48VDC
I/P
+ -
Figure 12. 48 V dc power distribution between two Pm10 units.
ote:
N
These cables are power feeds. They should be, where
possible, routed within the PA/GA system in a separate way to avoid
contact with ac power or audio cables and reduce the possibility of
interference.
Maximum supported wires are:
•
Solid:
1.5
mm
2
•
Stranded:
•
including sleeved ferrule:
0.5 mm
2
•
including non-sleeved ferrule:
1.5 mm
2
