This is the same logical design as PebblePower1, has all the same features, it just has two output channels rather than one.
<aside> 💡 The only unique / additional feature for PP2 and PP4 over PP1 is a hardware feature where the relay channels have the option to source power from the main PP input or from an external source. In the case of PP1, all power for both the PP device itself and target device are sourced from the main PP input and provide for a total power rating of 10A. For PP2 and PP4, the PP power input is rated to 10A but each channel is also rated to 10A. To prevent needing to support 40A power input, each output channel has a jumper to select if the power being delivered to the channel is sourced from the main PP input or from the “common” terminal for on each channel.
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The GPIO pin assignments are the same for all PebblePower devices to ensure the same firmware can be used for all devices. Please look at the GPIO pin assignments page for details.