Three modules have been developed with digital and analogue interfaces not only for the PI-CPUF407. This includes the PI-FIO module, designed for direct use of the interfaces on the STM32F407 processor, as well as PI-DIO with galvanically isolated digital inputs and outputs and PI-AIO with galvanically isolated analog inputs and outputs. PI-DIO and PI-AIO are compatible with the HAT+ standard for Raspberry Pi.
The PI-FIO module contains 4 digital inputs and 2 digital outputs for 12 or 24V systems, two analog inputs 0-10V, 4-20mA or PTC and NTC for temperature measurement and one analog output 0-5V or 4-20mA. All inputs and outputs are controlled directly from the processor on the PI-CPUF407 module and are not galvanically isolated.
The PI-DIO module contains 4 digital 12/24V inputs and 2 digital 12/24V outputs with a maximum current of 2A and overload indication. All inputs and outputs are galvanically isolated from each other. The control is implemented via I2C interface.
The PI-AIO module contains 4 analog inputs, optionally 0-10V, 4-20mA or for temperature measurement with NTC or PTC and two analog outputs, optionally 0-5V or 4-20mA. The analog inputs and outputs are galvanically isolated from the processor module and controlled over the I2C bus.
All modules are stackable, so they can be layered on top of each other. Theoretically, up to 8 PI-DIO modules and 4 PI-AIO modules can be connected in one system. Only one PI-FIO module can be used in the system, as it is connected directly to the GPIO pins of the processor.
All modules will be available later this year.