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© MiMOMax 2013 Four Wire Audio
Interface Manual
3
POWER
3.1
O
VERVIEW
The Four Wire Audio interface contains an isolated pre-regulator followed by local regulators
to individual functional blocks.
The Isolated DC/DC Pre-Regulator accepts an input range of 12 to 48 volts DC and outputs a
DC voltage with a nominal value of 10.5 volts DC.
The absolute minimum and maximum input voltages are 10 and 65 volt DC respectively with
isolation of up to 1500 volts to board circuitry and unit ground being provided.
Where the Radio Units supply meets the above requirements it may also be used to power
the FWA interface.
Isolated DC/DC
Pre-Regulator
(10.5 volts DC)
Board Level Regulation
DC Input -
Filtering
DC Input +
Filtering
10.5 volts DC
Unit
Ground
Circuit Overview
3.2
C
ABLING AND
C
ONNECTIVITY
Image Showing Power Connected
Power Connector
(Phoenix Contact MSTBA 2,5 HC/2-G-5,08 Header)
Pin
Signal
Polarity
Description
-
NEGATIVE
0 volts
- volts
DC Input
(Polarity must be observed)
+
POSITIVE
+ volts
0 volts
