DIN-Rail 15-30V PCF8574A I2C OPTO Board

*The RoHS icon with this product means the PCBs, components, solder, chemicals are all lead-free and RoHS compliant. And this product is produced in lead free process. Unfortunately, now, we cannot provide documentation for this product is RoHS compliant.

Resources:

• Use Manual (pdf)
• Schematic (pdf)
• PCF8574 Datasheet (pdf)
• 3D Models (step)

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Package Includes:

• 1x Board

This package does not include Din-Rail PCB holders and cables.

Notes:

• This board uses 5-pin connectors for I2C bus.

Features:

• PCF8574A I2C chips
• Support 100kHz I2C bus frequency
• On-board I2C bus pull-up resistors
• Address by 3 jumpers for use of up to 8 addresses
• Up to 16 boards on a bus, (use with I2C-IN830M)
• Interrupt output signal
• On-board interrupt pull-up resistor
• Compatible with most microcontrollers
• 8 Optically isolated digital input channels
• 15-30VDC input voltage
• 3700VDC isolation input voltage
• Operating power supply voltage 3.3-5.5VDC
• Inverse polarity protection circuits
• DIN-rail supports
• PCB size 42.50x72.00mm

This is 8-channel opto-isolator board for input expander over I2C bus. Each input accepts 15-30VDC. It is suitable for mechanical contact switching devices such as relay switches, push-buttons and switches. The board uses PCF8574A I2C chip. It supports 100KHz bus speed and 3.3-5.5VDC bus voltage. The board has three jumpers for setting own address. So boards can be connected up to 16 boards on a bus. Also there are I2C bus pull-up resistors and interrupt pull-up resistor on board. They can be enabled by jumpers.
The board can be placed on DIN rail PCB holder which can be plugged on a tray.

The difference between I2C-IN830M and I2C-IN830MA is I2C chip. The I2C-IN830M uses PCF8574 but the I2C-IN830MA uses PCF8574A. And the difference between PCF8574 and PCF8574A is I2C bus address.

To prevent damage to the board. Don't plug and/or unplug I2C cables on the board while a power supply still turns on. Turn off a power supply before plug and/or unplug I2C cables on the board.