JennyH
Hi,

I'm wondering what the 5V power supplies' max capabilities are on the ICD?

Thanks in advance [smile] 

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AlastairF
Hi,
There are 7 Sensor Power outputs on an ICD distributed across 15 pins. Some of the Sensor Powers are fixed 5V or 12V and some are configurable for 5V or 12V. Pi Toolset will show which pins are used and the allow the selection of Voltage for that Sensor Power - see the screenshot below.

Each Sensor Power is capable of 100mA and can handle a little more that 100mA for short durations (inrush). If the current is too high then output will turn off to protect itself. Each Sensor Power is also short circuit protected, so if one sensor goes bad and creates a short then the Sensor Power will shut off to protect itself. Due to some Sensor Powers sharing pins some of the other sensors will also shut down. Removing the short and power cycling is necessary to clear the fault.

Careful Loom design is also required to minimise Sensor Power issues. For example in the Porsche 991 all four Wheelspeeds, Fuel level and the Option 3 spares connector use the same sensor power 7, so if the Option 3 connector has its 12V power shorted or the current is too high then the car will also power down all the Wheelspeeds and Fuel Level sensor. Hind sight with the loom design could maybe allocate the Option connector a little better to avoid this scenario.

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