Regular price $229.95 USD Sale

The PI-SPI-DIN-2x4MIO Interface for the Raspberry Pi is a complete automation solution. This multi I/O interface combines 2 isolated analog inputs, 2 analog outputs, 2 digital inputs and 2 relay outputs into one seamless module for the Raspberry Pi.

Raspberry Pi not included.

 Node-Red support is now available.

Please Allow up to 2 weeks for delivery.


  • Power Input 9 to 36 VDC (Typically 24 VDC for fixed systems or 12 VDC for battery operated systems) via terminal block or 2.1 x 5 mm Barrel Plug
  • 0.75" aluminum spacers for the Raspberry Pi complete with 40 pin GPIO ribbon cable (included)
  • DIN Rail mounting clips (2) included
  • 5VDC @ 2.5A for the Raspberry Pi, provided via the 40 Pin GPIO ribbon cable
  • Real Time Clock c/w CR2032 Battery
  • RS485 via terminal block or RJ45 connector (for Modbus RTU applications)
  • 2 Channels Isolated (Opto-Coupler) Digital Inputs ( Same as the PI-SPI-DIN-8DI)
  • 2 Relay Outputs, contacts Rated at 2 Amp (2 SPDT)
  • 2 SDAFE™ Analog Modules
    Software Defined Analog Front End Modules with 15 bit A/D resolution
    Isolated Programmable Analog Inputs
    4-20mA, 0-5 VDC, or 0 to 10 VDC
  • 2 Isolated 24 VDC 40 mA Power supply for loop powered transmitters
  • 2 Analog Outputs 4-20 mA
  • PI-SPI-DIN series expansion modules 100% compatible for building out larger systems
  • Optional Aluminum enclosure


For applications requiring more isolated analog inputs, the PI-SPI-DIN-2x4MIO can be expanded using the new PI-SPI-DIN-SDAFE-E module. This supports up to 4 SDAFE modules. Each module has 5 chip selects and 4 addresses. With full expansion, the PI-SPI-DIN2x4MIO can have 22 isolated analog input circuits.

PI-SPI-DIN-2x4MIO with the SDAFE expansion module:



The PI-SPI-DIN-2x4MIO has an optional aluminum (aviation grade) enclosure  that fits over the complete assembly. The enclosure fits like a shroud over the printed circuit boards and fastens with 4 screws.

PI-SPI-DIN-2x4MIO Enclosure Front View

 PI-SPI-DIN-2x4MIO Enclosure Rear View


Software Defined Analog Front End

Each SDAFE™ Isolated Analog Module can be programmed thru the application software to be mA or VDC input. All modules are factory calibrated with 6 break point calibration per input type.

The SDAFE-X55 is an isolated analog signal conditioner. Inputs can be software selected to be either mA or VDC in various ranges and unit types. Signal and power isolation based on the Analog Devices, Inc., iCoupler® technology,

The Isolator Integrated Circuit carries the following Safety and Regulatory Approvals:

  • UL recognition
  • 2500 V rms for 1 minute per UL 1577
  • CSA Component Acceptance Notice #5A
  • VDE certificate of conformity (pending)
  • IEC 60747-5-2 (VDE 0884, Part 2)
  • VIORM= 560 V peak

The SDAFE™ communicates via SPI, and is powered from a single +3.3VDC or +5VDC source. The A/D converter is a 15 bit A/D.

Standard Ranges:

  • 0 - 20 mA
  • 0 - 5 VDC
  • 0 - 10 VDC

The SDAFE™ Manual