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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.
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Package Includes:
This package does not include Din-Rail PCB holders and cables.
Notes:
- This board uses 4-pin connectors for I2C bus.
Features:
- PCF8574A I2C controller chip
- 100KHz I2C bus frequency
- Addressable via 3 jumpers, allowing up to 8 addresses
- Supports up to 16 boards on a single bus, (connected together with PCF8574)
- Compatible with most microcontrollers
- 8 optically isolated digital input channels
- 5-30Vdc input voltage
- 3700Vdc isolation input voltage
- Operating power supply voltage: 3.3-5.5VDC
- Inverse polarity protection circuits
- Mountable on DIN-rail PCB holder
- PCB size: 42.50x72.00mm
This is the third generation of the 8-channel opto-isolator board designed for input expansion over the I2C bus. Each input accepts 5-30VDC, making it suitable for mechanical contact switching devices such as relays, buttons, and switches.
The board uses the PCF8574A I2C controller chip, supports a 100kHz bus speed, and operates with a bus voltage of 3.3-5.5VDC. It features three jumpers for setting its address, allowing up to 16 boards to be connected on a single bus.
In this version, the board does not include I2C bus pull-up resistors or an interrupt pull-up resistor on board. These pull-up resistors must be connected to the I2C bus externally.
The board can be mounted on a DIN-rail PCB holder, which can be securely attached to a tray.
The difference between the I2C-IN830MxV3 and I2C-IN830MAxV3 lies in the I2C controller chip used. The I2C-IN830MxV3 uses the PCF8574, while the I2C-IN830MAxV3 uses the PCF8574A. The key distinction between the PCF8574 and PCF8574A is their I2C bus 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.
