Tait TM9300 DMR Installation Manual

Also see for TM9300: Quick start guide User guide User guide User guide User guide

TM9300/TM9400 Installation Guide Installing the Radio 37© Tait Limited December 2015External AlertDevice The radio allows for output to external alert devices using the digital GPIOlines of the auxiliary connector and the internal options connector.AUX GPIO4 can be fitted with a power MOSFET (Q10N) to directlyconnect external alert devices (e.g. flashing light, buzzer, horn relay) to theradio. Also, resistor R75N must be removed.Notice While the MOSFET is rated at 12 A (with heat sink), the max-imum allowable current of the connector and radio’s earthing system is2 A. 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 forAUX GPIO4) and pin 8 (+13V8 SW) of the auxiliary connector (or adifferent positive battery connection).This means that the negative side of the alert device must be connected toAUX GPIO4 and the positive side to pin 8 (+13V8 SW). The external alertdevice must be capable of accepting a voltage of between 10V and 18V.4.10 Installing the Radio1. Connect the antenna cable, power cable, and (if applicable) theauxiliary cable to the rear of the radio.2. Position the radio in the U-cradle so that the holes in the U-cradleline up with the holes in the radio chassis.3. Screw the radio into position using the four thumb screws provided,but without fully tightening the screws.4. Adjust the position of the radio in the U-cradle for the best viewingangle, then tighten the thumb screws.