User's Manual

455U-D Radio Modem Module User Manual
Page 24 © Jan 2008
Alternately the 455U can be supplied through the “12V” terminals using a 12-15V supply.
For DC supplies, the negative side of the supply is connected to earth (“Earth” terminal). The
supply negative is connected to the module case internally. The positive side of the supply
must not be connected to earth. The DC supply may be a floating supply or negatively
earthed.
The power requirements of the 455U-D units at 12VDC is 110mA (quiescent) and 2A when
transmitting (5 Watt), or 450mA for 500mW.
B
A


 Earth
+24
+12
DIO
15 – 30 VDC
Power
Supply
DC Out
- +
455U
Optional Battery
Fuse 5A
_
+
B
A


Earth
+24
+12
DIO
12 – 15 VDC
Power
Supply
DC Out
455U
_
+