20 Power Sense and Connector Power Supply Options TM9300/TM9400 Installation Guide
© Tait Limited December 2015
The factory defaults are:
■ hardware link LK1M (+13.8V battery power sense): fitted
■ hardware link LK2M (ignition sense): fitted
■ hardware link LK3M (emergency sense): fitted
The radio can be programmed to be either on, or to return to its previous
state when the power sense signal is removed. For information on
programming the power-on mode refer to the online help of the
programming software.
The ON/OFF key can be used with any of the of the power-sense options
to turn the radio on and off.
Table 3.1 shows the configuration of the hardware links LK1M, LK2M and
LK4M for the individual power-sense options. It also lists the dependence
of the power-sense options with respect to the GPI lines, which can or
cannot be used.
Figure 3.1 Block diagram of hardware links LK1M to LK4M
IOP GPIO7
13V8 BATT
LK2M
Auxiliary Power Sense
AUX GPI3
13.8V Battery
13V8 BATT
Power-up
Circuit
(Ignition Sense)
AUX GPI2
LK3M
Emergency
Sense
LK4M
Internal Options
Power Sense
ON/OFF Key
LK1M
Power Sense
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