Motorola NNTN4846, Owner'S Manual

Page: 9 / 100

CAR KIT OWNER’S MANUAL 5
DC Power Cable Installation
The Car Kit must be operated only in negative ground electrical systems.
Reverse polarity (positive ground) will trigger protection circuits which cause the
cable fuse to open. Check the ground polarity before you begin the installation to
prevent wasted time and effort. Only 12V DC automotive systems are directly
supported. For 24V DC operation, external converter (NNTN4079) is required.
The DC power cable shipped with the Car Kit is suitable for installation in most
vehicles. Follow the instructions below for the power cable installation.
1. Route the black lead of the main power cable to convenient chassis ground
and the red lead to the positive supply voltage connection points. If it is
necessary to penetrate the firewall, use an existing opening.
Or,
If necessary, drill a new hole approximately 9/16 inch or 3.5 cm in diameter.
Make sure that there is enough clearance on the opposite side. Insert a
grommet into the hole to prevent damage to the power cable. When making
connections on the engine side of the firewall, additional in-line fuse
holders (included) should be used at the connection points.
2. Cut the black lead to the desired length.
• If the connection is being made under the dash or in the vehicle cabin,
connect the black lead directly to the chassis of the vehicle.
• If the connection is being made in the engine compartment, connect the
black in-line fuse holder between the black lead of the power cable and the
desired chassis connection point.
NOTE: Do not connect the black lead to the negative (-) battery terminal;
the Car Kit could be damaged if there were a malfunction in the
vehicle’s electrical system.
3. Cut the red lead to the desired length. This lead will be connected such that
it has positive supply voltage at all times, even when the vehicle is turned
off.
• If the connection is being made under the dash or in the vehicle cabin,
connect the red lead to a positive supply voltage point.
• If connection is being made in the engine compartment or directly to the
battery, connect the red in-line fuse holder between the red lead of the
power cable and the desired positive voltage connection point.