User manual

Chapter 3 Installation
Page 31 ©February 2009
For licensed 105U units with RF power above 2W, the unit needs to be powered from
the 12V “Battery” terminals with a power supply of at least 2A rating. Alternately, the
unit can be powered via the SUP1 / SUP2 terminals, provided a backup battery is
connected to the “Battery” terminals to supply the inrush current for the radio transmitter.
This is not required for units with radio power less than 2W.
3.3.1 AC Supply
The AC supply is connected to the “SUP1” and “SUP2” terminals as shown below. The AC
supply should be “floating” relative to earth.
3.3.2 DC Supply
For DC supplies, the positive lead is connected to “SUP1” and the negative to “GND”. The
positive side of the supply must not be connected to earth.
The DC supply may be a floating
supply or negatively grounded.
The module may also be powered from an external 11 – 15 VDC battery supply without the need
for a “normal” supply connected to “SUP1”. This external battery supply is connected to
“BAT+” and “GND” terminals. The positive lead of the external supply should be protected by a
5A fuse
SUP1
SUP2
GND
BAT+
12 – 24 VAC
Power
Supply
AC Out
- +
105G
Optional Battery
Fuse 5A
GND
SUP1
SUP2
GND
BAT+
9 – 30 VDC
Power
Supply
DC Out
- +
105G
Optional Battery
Fuse 5A
_
+
SUP1
SUP2
GND
BAT+
- +
105G
BATTERY SUPPLY
11-15 VDC
Fuse 5A