30A Relay HAT
0x20I/O board which offers a whopping 30A switching capability up to 277V AC. Ideally suited to switching of household appliances, industrial machinery or automotive applications.
Features
- 2 opto-isolated SPDT power relays
- Up to 30A / 15A @ 277V AC (NO / NC)
- 2oz copper PCB ensures maximum current flow
- Based on the MCP23008 8-port GPIO expander
- Jumper selectable I2C address & GPIO voltage (3.3V / 5V)
- Can be used with 3.3V or 5V I2C host devices (eg, Arduino)
- Built-in user programmable ID EEPROM
Details
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WiringPi Guide
Read
gpio -x mcp23008:100:0x20 read 108
Write
gpio -x mcp23008:100:0x20 mode 108 out
gpio -x mcp23008:100:0x20 write 108 1
- Operating voltage: - 1.8V to 5.5V
- Maximum current into VDD pin: 125mA
- Maximum current out of VSS pin: 150mA
Isolating the Relays
Removing the LINK jumper will disconnect 5V power to the relays. This allows you to power the relays from a dedicated supply if required.
GPIO Voltage
The 3V3 Jumper is used to drive the GPIO expander voltage to 3V3.
To use with Arduino or any other 5V device the 3V3 jumper must be moved to 5V.
GPIO Voltage
The 5V Jumper is used to drive the GPIO expander voltage to 5V.
Select this jumper to use with Arduino or any other 5V device and use the SDA & SDL breakout pins for I2C communication.