DI6acDQ6rly I2C-HAT

43 Reviews

Raspberry Pi I/O Module / I2C / 6 Digital Inputs / 6 Relay Outputs

  • 6 isolated digital input channels
  • Source and sink type for digital input channels
  • Interrupt request(IRQ)
  • Internal 32-bit counters for all digital input channels
  • 6 relay output channels(5A@250VAC)
  • PWM relay drive for a massive 75% average power consumption reduction
  • Configurable relay PowerOnValue
  • Configurable relay SafetyValue
  • Dual watchdog(system and communication)
  • 2000 VAC isolation voltage
  • Temperature operating range -25 ~ +75°C
  • Stackable, up to 16x
(Excl. tax)

The DI6acDQ6rly I2C-HAT is a 6 digital input channels and 6 relay Raspberry Pi add-on board that uses the I2C bus for communication with Raspberry Pi. The DI6acDQ6rly offers 6 sink/source isolated digital input channels and 6 Form A power relay output channels. The input channels can be used as edge counters, every input channel has an two 32-bit counters attached, one for counting rising edges and the other for counting falling edges. The DI6acDQ6rly also has 6 LED indicators for digital inputs status monitoring and 6 LED indicators for power relay outputs status monitoring.

Users can stack up to 16x DI6acDQ6rly I2C-HATs on one Raspberry Pi. Make sure every DI6acDQ6rly from the stack has a unique I2C bus address. Setting the address value is accomplished using the on board I2C address jumpers.

Interrupt Requests - IRQs

Everyone of the Digital Input Channels has the capability of generating an Interrupt, on both rising and falling edges. The firmware determines the Digital Input Channels Interrupts and triggers the derived IRQ signal(open collector) that goes to a Raspberry Pi gpio(selectable using solder jumpers, but default is GPIO21). This IRQ signal will trigger an interrupt on Raspberry Pi thus informing that a change has occured on one or more of the Digital Input Channels and Raspberry PI should read the board DI_IRQ Capture Queue using the I2C bus commands. The Raspberry Pi GPIO21 pin should be configured with pullup resistor enabled and Falling Edge Interrupt enabled, please see python example

Power Consumption

This type of HAT consumes a little more power than other types, check specs for power consumption. The reason for the power consumption is the high number of relays. Be careful when stacking multiple HATs that have relays in general.


Interface I2C @ 100 kbs
Voltage Supply 5V
Power Consumption 0.75W(150mA@5V) max.
Operating Temperature -25 to 75°C
Watchdog Timer System and Communication
Digital Inputs
Digital Input Channels 6
Signal Type Sink, Source, isolated channels with common ground or power
On Voltage Level +3 to +30V
Off Voltage Level +1V max.
Counter Channels 12(6rising & 6 falling), 32-bit, Max. Input Frequency : 100Hz, Min. Pulse Width : 5ms
Isolation Voltage 2000 VAC
Input Resistance 5.6K
Relay Outputs
Relay Channels 6
Relay Type Form A relay SPST (N.O.)
Contact Rating 5A @ 250VAC/30VDC
Breakdown Voltage 2000 VAC
Operate Time 10ms
Release Time 5ms



The DI6acDQ6rly I2C-HAT has 2 connectors(8 pin and 12 pin, 3.81mm pitch, detachable screw terminal).

The first connector(8 pin) is used by the 6 Digital Input channels, it has 6 Digital Input pins and 2 Common pins. Every input channel uses 2 pins:

  1. Ix, where x is the channel index, range [0..5]
  2. COM

The second connector(12 pin) is used by the 6 Relay Output channels. Every Relay Output channel uses 2 pins:

  1. NOx – NormalOpen
  2. COMx – Common where x is the channel index, range is [0..5]

For details about wiring diagrams check the Digital Inputs Sink/Source Types and Relay Outputs in the Application Wiring post.