POLMAR DB-50M, User Manual

Page: 52 / 93

7
◊ DC Power Cable Connection
Mobile Operation
The vehicle battery must have a nominal rating of 12 V. Never
connect the transceiver to a 24 V battery. Be sure to use a 12 V
vehicle battery that has sufficient current capacity. If the current
to the transceiver is insufficient, the display may darken during
transmission, or transmitting output power may drop excessively.
1. Route the DC power cable supplied with the transceiver directly
to the vehicle’s battery terminals using the shortest path from
the transceiver.
• We recommend you do not use the cigarette lighter socket
as some cigarette lighter sockets introduce an unacceptable
voltage drop.
• The entire length of the cable must be dressed so it is
isolated from heat, moisture, and the engine secondary
(high voltage) ignition system / cables.
2. After installing cable, in order to avoid the risk of damp, please
use heat-resistant tap to tie together with fuse box. Don’t
forget to reinforce whole cable.
3. In order to avoid the risk of short circuit, please cut down
connection with negative (-) of battery, then connect with
radio.
4. Confirm the correct polarity of the connections, then attach
the power cable to the battery terminals; red connects to the
positive (+) terminal and black connects to the negative (-)
terminal.
• Use the full length of the cable without cutting off excess
even if the cable is longer than required. In particular, never
remove the fuse holders from the cable.
5. Reconnect any wiring removed from the negative terminal.
6. Connect the DC power cable to the transceiver’s power supply
connector.
• Press the connectors firmly together until the locking tab
clicks.
• If the ignition-key on/off feature is desired (optional feature),
use the optional (for cigar-plug connection) cable. Connect
one of the cables between the ACC terminal or a Cigar-Plug
that operates with the vehicle ignition or ACC switch on the
vehicle and EXT POWER jack on the rear side of the unit.
Locate the power input connector as close to the transceiver as
possible.
NOTE
Red
Black
Ext. Power jack
DC power cable
In many cars, the cigar-lighter plug is always powered. If this is
the case, you cannot use it for the ignition key on/off function.
NOTE