Digital input module with 16 digital inputs, which you can configure as a digital input, counter input, or encoder.
https://revolutionpi.com/fileadmin/downloads/datasheets/Datasheet_RevPi_DI.pdf
Digital input module with 16 digital inputs, which you can configure as a digital input, counter input, or encoder.
https://revolutionpi.com/fileadmin/downloads/datasheets/Datasheet_RevPi_DI.pdf