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Standby Current
Table 2.4
Estimated current drain for the TM9456 radio systems
Completely off
Radio System
(e.g. off via
type
ignition sense)
TM9456 Dual body,
<8 mA
single head
Connecting the
Power Cable
1.
2.
3.
4.
TM9456 Dual-Radio Installation and Programming Guide
© Tait Limited July 2016
Stand-by (e.g. off
via on/off key)
approx. 120 mA
Notice Although it is possible to connect the radio system in line
with the vehicle ignition, this is not recommended, as it may draw too
much current and damage the vehicle wiring and steering column or
ignition switch. This may also cause the supply voltage of the radio to
drop below the specified level.
Notice Disconnecting the vehicle's battery may cause problems with
some electronic equipment, such as vehicle alarms, engine management
systems, and in-car entertainment systems. Check that the vehicle
owner has the necessary information to make all electronic equipment
function correctly after battery reconnection.
Notice If the battery is not disconnected, exercise extreme caution
during the installation and install the fuses only when the installation is
ready to be checked. For more information, refer to
Installation" on page
36.
Disconnect the vehicle's battery unless specifically prohibited from
doing so by the customer, vehicle manufacturer, agent, or supplier.
Notice Route the cables in a manner that minimizes coupling of elec-
tric vehicle systems such as alternators into the radio.
Notice Protect the power cables from engine heat, sharp edges and
from being pinched or crushed.
Run the power cable between one radio's mounting position and the
power source and cut it to length, allowing approximately 20 cm
(8 in.) excess at the radio end.
Plug the power cable into the power connector of the radio.
Cut the negative (black) and the positive (red) wires where the in-
line fuse holders will be placed (as close to the power source as
possible).
Notice Do not install the fuses until the installation is ready to be
checked. For more information, refer to
page
36.
On (no backlight)
but not
On (maximum
transmitting or
backlighting)
receiving
approx. 200 mA
approx. 250 mA
"Checking the
"Checking the Installation" on
Installing a Dual-Radio System
29
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