Tait TM8100 Installation Manual page 22

Shielding
Ignition Signal
22 Installing the Radio
If the auxiliary cable is longer than 1m (4 feet) it is recommended that the
cable and connector backshell are shielded.
recommended shielding arrangement. The earth braid wire (bare copper)
and aluminum foil should only be earthed at the radio end of the cable.
Figure 2.5 Auxiliary cable and connector shielding
metal D-range shroud in
contact with backshell
The ignition signal can be used to power up and power down the radio.
This will turn the radio off when the ignition key is off to avoid flattening
the battery, and will turn the radio on or return to its previous state (as
programmed) when the ignition key is on.
Note
A TMAA04-05 ignition sense kit is available. The kit comprises a
mating plug for the radio's auxiliary connector and a 4m (13 foot)
length of cable to connect to the vehicle's ignition signal.
Note
The AUX GPI3 line must be programmed to 'Power Sense
(Ignition)' and active to 'High'. For more information, refer to the
online help of the programming application.
Connect the ignition signal to pin 4 (AUX GPI3) of the
auxiliary connector.
Note
The logic thresholds for AUX GPI3 are based on 3V3 levels.
However, AUX GPI3 can be connected directly to a +13.8V
ignition signal (for input levels, refer to
Figure 2.5
metal backshell
signal earth wire
aluminum foil
metal cable clamp
earth braid wire
analog ground pin
shows the
cable insulation
Table 2.3 on page 20).
TM8100/TM8200 Installation Guide
© Tait Electronics Limited July 2006