PI-SPI-DIN-4AO Raspberry Pi DIN Rail Analog Output 4-20mA Interface
This is the DIN rail mountable version of the PI-SPI-2AO Analog Input Interface! The PI-SPI-DIN-4AO is based on the Microchip MCP4728 12 bit D/A converter with the I2C Interface.
The MCP4728 can have up to 8 programmable I2C addresses allowing 8 PI-SPI-DIN-4AO's to be daisy chained together for a total of 32 analog outputs.
Each output channel has jumper selections for: 4-20 mA, 0 to 5 VDC or 0 to 10 VDC output.
Each channel has jumper selections to power the output circuit from the internal field voltage applied to the main PI-SPI-DIN module, OR from the applied voltage to the output channel terminal block.
Each module in the PI-SPI-DIN series has two 16b Pin GPIO ports that carry power, SPI, I2C and 5 Chip Selects from the main PI-SPI-DIN-RTC-RS485 Module. Also, each module has it's own 5VDC switching power supply and 3.3VDC LDO regulator.
Two 16 Pin GPIO Ports (Power, SPI, I2C and 5 Chip Selects)
5 VDC 0.5A Switching Power Supply (9 to 24 VDC Input)
3.3VDC LDO regulator
Terminal Blocks are rising clamp cage screw type (no leaf springs)
Blue LED indicator for power
MCP4728 A/D Converter with 12 bit resolution
I2C Interface with buffering
I2C Address Range 0x60 to 0x67
Analog output drive at 24 VDC field power is 1000 Ohms
Analog Output jumper selectable 4-20 mA, 0 to 5 VDC or 0 to 10 VDC
Output Channel Power jumper selectable from main module or applied field power to terminal block
Each output circuit has a signal strength LED
PCB Dimensions: 2.7" Wide x 3.42" Long
Each PI-SPI-DIN module has three mounting styles available:
PCB on Spacers
DIN rail Clips
DIN rail Enclosure
PI-SPI-DIN-4AO Accessories :
All PI-SPI-DIN Interfaces come complete with interconnect ribbon cables and all necessary hardware based on enclosure style.
Typical Application with pcb DIN clip mounting:
The PI-SPI-DIN Series now has Node-RED support. Please visit