THE STRATO PI CAN CIRCUIT BOARD
Power supply
Strato Pi can be powered with DC voltage only:
✓
DC: nominal voltage range 9.0V to 65.0V.
Respect the correct polarity shown in the schematic diagram (+ -). The power supply
circuit implements reverse polarity protection using auto resetting fuses and surge
protection up to ±500V/2ohms 1.2/50
μ
s.
A blue on-board LED, also visible through the front panel of the DIN-rail case, is lit when
power supply is available.
When a Strato Pi CAN board is used, never connect the Raspberry Pi micro-USB power
plug.
The Strato Pi CAN power supply stage is optimised to deliver up to 2.5A at 5V to the
Raspberry Pi. Because Strato Pi CAN has two parallel 650mA resettable fuses (polyfuse)
on the power supply line, the maximum current that its regulator can deliver is also limited
by these fuses, and depends on the input voltage. The following table lists the typical
measured output current of the power supply stage at different input voltages, and the
corresponding input current. At high input voltage levels, the voltage regulator’s thermal
protection becomes the limiting factor.
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Strato Pi CAN User Guide