INSTALLATION ON THE VEHICLE
20
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These materials and information are intended solely for the purpose designated and may not be used otherwise.
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Power Supply Connection
The system must be powered in direct current (VDC) ranging from 12V to 24V (±10%).
The devices to be powered are the CPU and the HUB. A direct positive wire (VIN) and a positive wire under key (VQ) must
arrive to the CPU, whereas only the direct positive wire protected by an ATO fuse (4A/32V) must arrive to the Hub.
Apply the supplied Fair Rite 0443178281 ferrite on the CPU power cables.
For the power supply connections, it is recommended to use an AWG 18 /0.75mm
2
cable or a cable with a higher cross
section.
Within the 12÷24 VDC power supply range, the voltage of the direct positive wire (V
IN
) and of the line under
key (V
Q
) do not have to be the same.
In some cases, the voltage present on the wire under key is not within the range foreseen by the system. In
these cases, one solution would be using a relay at the same voltage available for changing over the forward
voltage
For vehicles with a battery with power higher than 24V, such as electric vehicles for heavy work with 48V or
80V, follow the power supply scheme specified in chapter 24.6; use the indicated isolated power supply unit
or an equivalent model whenever possible.
ATO 4A 32V
CPU
HUB
CPU