Tait TM9155R Installation Manual

Contents

Tait TM9155R Installation Manual Manual pdf 14 page image

14 Installing the Radio TM9100 Mobiles: 110 W Mobile Installation Guide© Tait Electronics Limited October 20054.3 Connecting the Power Cable to the Power SourcePower is supplied to the 110 W mobile via a cable with a DB25 connector(provided). This plugs into the external RF amplifier, which provides powerto the back of the radio body via an internal loom.Important This radio is designed to operate from a nominal 12Vnegative ground supply and may draw up to 30A of current.The radio will tolerate a supply voltage range of 10.8V to16.6V at the radio.Selecting the PowerSourceIn passenger vehicles, the radio is always connected directly to the battery.In trucks, where direct connection to the battery is often not possible, theradio can be connected to a suitable terminal inside the fuse box that isconnected directly to the battery.24V-to-12VConverter In vehicles with a supply voltage larger than 16.0V, such as many trucks, itis essential to provide a suitably rated 24V-to-12V converter. This willisolate the radio from excessive battery voltage and provide the correct DCoperating conditions. Note that most 24V-to-12V converters already fittedare not rated sufficiently.Standby Current When using the ignition signal to turn off the radio, the standby current isreduced to <3mA. Otherwise, the standby current is 50mA.Connecting thePower CableImportant Although it is possible to connect the radio in line with thevehicle ignition, this is not recommended, as it may drawtoo much current and damage the vehicle wiring andsteering column or ignition switch. This may also cause thesupply voltage of the radio to drop below the specified level.Important Disconnecting the vehicle’s battery may cause problemswith some electronic equipment, such as vehicle alarms,engine management systems, and in-car entertainmentsystems. Check that the vehicle owner has the necessaryinformation to make all electronic equipment functioncorrectly after battery reconnection.Important If the battery is not disconnected, exercise extreme cautionduring the installation and install the fuses only when theinstallation is ready to be checked. For more information,refer to “Checking the Installation” on page 22.1. Disconnect the vehicle’s battery unless specifically prohibited fromdoing so by the customer, vehicle manufacturer, agent, or supplier.Important Route the cable in a manner that minimizes coupling ofelectric vehicle systems such as alternators into the radio.