DIN-Rail 4-20mA Analog Output MCP4725A1 I2C DAC Board

*The RoHS icon on this product indicates that the PCBs, components, solder, and chemicals are all lead-free and RoHS compliant. Additionally, this product is produced using a lead-free process. Unfortunately, we are currently unable to provide documentation confirming that this product is RoHS compliant.

Resources:

• User Manual (.pdf)
• Schematic (.pdf)
• MCP4725 Datasheet (.pdf)
• 3D Models (.step)

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Package Includes:

• 1x Board

Notes:

• This package does not include Din-Rail PCB holders and cables.
• This board uses 4-pin connectors for I2C bus.
• Side by side linking of this products uses 2.5 inch long of wires.

Features:

• 4-20mA Analog Outputs
• Supports up two boards on a bus for this model
• Up to eight boards on a bus (see datasheet for details)
• MCP4725A1 12-bit Digital to Analog Converter
• I2C Bus Voltage: 3-5V
• Power supply for Analog Output: 9-36V
• Onboard pull-up resistors for I2C bus
• Compatible with most microcontrollers
• Inverse Polarity Protection Circuits for Supply Voltage
• Mountable on a Din-rail PCB holder

The I2C-AO112DI1 is a digital-to-analog output board that is mountable on a DIN-rail PCB holder. It is designed for a 2-wire 4-20mA current loop transmitter, with the 4-20mA analog output controlled via the I2C bus. The board features a 12-bit digital-to-analog converter and includes an isolation chip that separates the I2C signals on the board from the I2C bus signals. This ensures that analog signals remain unaffected when multiple boards are connected to the same bus.

Additionally, the board is equipped with a surge protector, safeguarding it against transient voltage events. The I2C bus operates at a working voltage of 3-5V, while the power supply voltage for the 4-20mA analog output ranges from 9-36V. Built-in polarity protection circuits prevent damage caused by incorrect connections.

Up to two boards can be connected to the same I2C bus. However, it is possible to connect up to eight boards on the same bus by using two of each model: I2C-AO112DI0, I2C-AO112DI1, I2C-AO112DI2, and I2C-AO112DI3, as each has a unique address.

To prevent damage to the board, do not plug or unplug I2C cables while the power supply is on. Always turn off the power supply before plugging or unplugging I2C cables on the board.