5
Electrical Installation
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Read warnings chapter on page 10 on this document.
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Protect power supply lines (6,8...32Vdc) with 3A fuse at power supply end of line.
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Connect the cables to A9 PRO device and peripherals as advised in the connection guide. Figure 14.
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Install the A9 PRO unit as far away as possible (minimum 1 metres recommended) from the car radio and its antenna or other electrical devices to
avoid any interference.
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Additional information: Application note
K505002 Cabling of Aplicom Products
.
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Avoid ground loops! It is highly recommended to connect all A9 PRO and peripherals ground connections to a single point. It is also recommended
to use non-grounding antennas.
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Disconnecting ground lines shall not be done while the unit is connected to power supply of the vehicle. This will cause voltage leak between IO
connections causing possible problems in external devices connected to them.
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Internal GSM/GPRS antenna: Install the A9 PRO
unit to a place where unit’s internal antenna have the best possible visibility to GSM/GPRS
network base stations.
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External GPS antenna: Install the GPS/GLONASS antenna to a place where it has the best possible open sky view. Please note that Aplicom
supplied antennas are installed inside the vehicle, on dashboard, on any surface, or windshield, depending on selected antenna type. The antennas
direction to satellites must be correct to have a good visibility of satellites. Only antennas that are separately specified and clearly stated to be used
outside of vehicle, can be installed so. Please refer to Aplicom documentation of the antenna.
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If the IGN -line is used ensure that it is connected to power line, in modern cars for example the lights etc. are pulse controlled.
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The GPS antenna connector contact retention is 1kg (min). Install the antenna with no disengagement force. If additional cable clamp is needed the
optional cable tie opening can be used. Figure 9. Notice that the cable angle shouldn't be too tight. Figure 8.
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A9 PRO
unit with CAN bus functionality * do not include internal bus terminator resistor (120Ω).
* CAN bus is available as option.
