Manualshelf

User's Manual

ManualsBrandsTait ManualsElectronicsMobile Transceiver
11121314151617181920
Table Of Contents
TM9100 (40W/50W) Installation Guide 19
© Tait Electronics Ltd October 2004
2.6 Connecting the Power Cable
Introduction This section provides the information required for the connection of power
cable to the power source.
Power Connector The power connector is the interface to the vehicle battery and an optional
external remote speaker. Connection of a remote speaker is discussed in the
next section.
Important This radio is designed to operate from a nominal 12V neg-
ative ground supply and may draw up to 15 A of current.
The radio will tolerate a supply voltage range of 10.8 V to
16.0V at the radio.
Selecting the Power Source In passenger vehicles, the radio is always connected directly to the battery
using the power cable provided.
In trucks, where direct connection to the battery is often not possible, the
radio can be connected to a suitable terminal inside the fuse box, that is
connected directly to the battery.
24V-to-12V Converter In vehicles with a supply voltage larger than 16.0V, such as many trucks, it
is essential to provide a suitably rated 24V-to-12V converter. This will isolate
the radio from excessive battery voltage and provide the correct DC
operating conditions. Note that most 24V-to-12V converters already fitted
are not rated sufficiently.
Standby Current When connecting the radio to the battery without using the ignition signal
as described on page 23, the standby current is approximately 28mA.
When using the ignition signal to turn off the radio, the standby current is
reduced to <1 mA.
Tip To reduce the standby current from 20 mA to approximately 1mA
without using the ignition signal, connect pin 4 of the auxiliary
connector to ground.
Table 2.1 Power connector (radio) - pins and signals
Pinout Pin
Signal
name
Description Signal type
1 AGND Earth return for radio body
power source.
Ground
2 SPK– External speaker output.
Balanced load configuration.
Analog
3 SPK+ External speaker output.
Balanced load configuration.
Analog
4 13V8_BATT DC power input for radio body
and control head.
Power
rear view