Tait TM9100 Installation Manual - page 20
20
Installing the Radio
TM9100 110W Mobile Radio Installation Guide
© Tait LimitedOctober 2012
External Alert
Device
The radio allows for output to external alert devices using the digital GPIO
lines of the auxiliary connector and the internal options connector.
AUX GPIO4 can be fitted with a power MOSFET (Q707) to directly
connect external alert devices (e.g. flashing light, buzzer, horn relay) to the
radio. Also, resistor R768 must be removed.
Notice
While the MOSFET is rated at 12A (with heat sink), the max-
imum allowable current of the connector and radio’s earthing system is
2A. Therefore, a horn must not be connected directly to the radio.
A horn relay must be used.
The selected output line must be programmed to ‘External Alert 1 or 2’,
active to ‘Low’, and signal state to ‘Momentary’.
Connect the external alert device to the pin of the output line (pin 10
for AUX GPIO4) and pin 8 (+13V8 SW) of the auxiliary connector
(or a different positive battery connection).
This means that the negative side of the alert device must be con-
nected to AUX GPIO4 and the positive side to pin 8 (+13V8 SW).
The external alert device must be capable of accepting a voltage of
between 10V and 18V.
Other External
Devices or Signals
If you want to connect any other Tait equipment, follow the instructions
supplied with the device.
Check
Table 3.2
to make sure that the auxiliary connector pins needed
are not already used by the 110W RF amplifier.
For third party external devices, consult Tait Support or the 3DK Hardware
Developer’s Kit Application Manual for detailed information about the pins
and their signals.
If the signal is available and appropriate, disconnect the loom between the
RF amplifier and the radio body. Open up the auxiliary connector (DB15)
and wire in the desired signal.