Besides three different digital I/O expansion modules, an analog I/O expansion module is also available. By using RevPi AIO, a Revolution Pi system is expanded by 4 analog inputs, 2 analog outputs and 2 RTD channels. Like all I/O modules RevPi AIO features a 28-pin I/O connector at the front. Inputs, Outputs and RTD channels are galvanically isolated to each other and to the logic circuit. RevPi AIO is protected against interference according to EN 61131-2 requirements and may be operated from -30 °C to 55 °C ambient temperature. Furthermore, the analog I/O module is UL certified (UL-File-No. E494534).
Analog Inputs
RevPi AIO features 4 analog inputs, equipped with an 24 bit ΔΣ DAC for connection analog sensors, like a level or proximity sensor.
Analog Outputs
RevPi AIO features 2 analog outputs with a 16 bit resolution for connecting analog actuators.
RTD Channels
Besides 4 analog input channels, RevPi AIO also features 2 separate RTD input channels. The 2 RTD inputs enable temperatures to be measured with high precision from -165 °C to +600 °C in steps of 0.5 °C using common RTDs sensors like Pt100/Pt1000 probes. The probes can be connected directly to the module with 2, 3 or 4 cables.