Omega Vehicle Security freedom OM-550 - Manual (Page 17)

OM-550 u 12 u
2.2 POWER SUPPLIES
As previously discussed the OM-550 operates from four AA internal batteries, AC
power adapter, DC power cable or an external rechargeable battery pack. Prior to use,
always ensure that external power supplies are operating properly before connecting
them to the OM-550.
•
The AC Power Adapter plugs into an appropriate 120V AC (in North America)
power outlet and then the DC power plug is inserted into the DC Jack on the left
side of the unit.
The AC Power Adapter does not charge the internal batteries. Use only alkaline,
size AA batteries. Do not use rechargeable Ni-cad cells.
•
The DC power cord connects to a 12V DC automobile cigarette lighter and then
the DC power plug is inserted into the DC Jack.
•
The External, 12V DC, Rechargeable battery pack is connected to the OM-550
by connecting the DC power cord to the battery pack and the DC power plug to
the DC Jack on the left side of the OM-550. Polarity of the connection does not
matter.
Install the internal batteries as a back-up source of power to avoid loss of data
when using the AC Power Adapter (or the external battery pack).