Cables are not included.
This is an I2C relay board. It is remote relay board for I2C bus. Making it ideal as relay output expander for small space. It is based on PCF8574A. Each
of PCF8574 and PCF8574A boards can be connected on a single bus up to 8 boards. So a single bus can be connected up to 16 boards. The board
supports 100kHz bus frequency and selectable bus pulling-up resistors for SDA and SCL signals. The board has eight small relays which are selected coil
input voltage from bus voltage or external voltage. The board also has inverse polarity protection circuits to prevent damage of the board from a
mistake of power supply connection. Double 4-pin bus connectors on the board make connection of bus easier than old versions. The LED will turn on
when input voltage is applied into the board. Mounting holds are compatible with the old versions, EI2C-9AI and EI2C-9AIA.
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.
Features:
- PCF8574A I2C bus chips
- 100kHz I2C bus frequency
- Selectable I2C bus pulling-up resistors
- Address by 3 jumpers for use of up to 8 addresses
- Up to 16 boards on a single bus
- Compatible with most microcontrollers
- Support 2.5 to 5.5V microcontroller ports
- There are 8 relay outputs
- 24Vdc coil voltages
- Relay contact rating 0.5A/120Vac, 1A/30Vdc, 0.15A/48Vdc
- I2C operating voltage 2.5Vdc to 5.5Vdc
- On-board inverse polarity protection circuits
- Small PCB size 81.6x36.1mm
Package Includes:
Notes:
- This board uses 4-pin connectors for I2C bus.
Downloads:
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