TM9300/TM9400 Installation Guide Power Sense and Connector Power Supply Options 19
© Tait Limited December 2015
3 Power Sense and Connector Power
Supply Options
The mobile radio allows the configuration of different power-sense options
to control how the radio is powered up and down, and connector power
supply options to control how power is switched to the connectors of the
mobile radio.
Before starting the installation it is important to understand these options
in order to make the right decision on how to best connect your mobile
radio.
3.1 Power Sense Options
The radio allows the configuration of different power-sense options to
control how the mobile radio is powered up and down:
■ battery power sense
■ auxiliary power sense (ignition sense)
■ internal-options power sense
■ no power sense
■ emergency power sense.
The emergency power-sense option can be used in conjunction with any of
the other four options.
The different power-sense options have to be facilitated by hardware
means, as the software cannot act before it is powered up. The radio
provides four hardware links (marked LK1M to LK4M) on the top-side of
the main board which can be configured to attain the power-sense option
desired.
Notice The hardware links are SMT components. Do not replace
SMT components unless you are trained and equipped to do so.
Attempting to replace SMT components without the necessary training,
tools, and equipment can cause permanent damage to the radio.
Figure 3.1 shows a block diagram of the hardware links LK1M to LK4M.
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