Technical Details
RPi Pin Uses
OSPi uses the following GPIO pins on the RPi (shaded in red). The other pins are free. The power pins as well as
SDA/SCL pins can be shared with other devices. All 40 pins from RPi are mapped out in the pinout area at the upper left
corner of the circuit board. The layout of the mapped out pins match the GPIO pins. Pins use by OSPi is marked by a
white outline.
Specifications
● Input Voltage: 22V AC to 30V AC.
● DC Output Current: 500mA @ 5V (to power RPi).
● Number of Zones: 8 on the OSPi, expandable by linking zone expansion boards.
● AC Output Current: 800mA continues @ 24V AC per zone / station, 8A impulse / inrush.
● Over-voltage Protection: 48V bi-directional TVS on each zone, AC input, and rain sensor terminal.
● Over-current Protection: 2A on AC input; 1A on 5V DC.
● Size: 135mm x 100mm x 32mm (5.3” x 4” x 1.26”)
● Weight: 150g (5.3oz) w/o RPi
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