DI16ac I2C-HAT – 16 digital input channels RaspberryPi add-on

$29.99 (incl. VAT: $35.69)

  • 16 isolated digital input channels
  • source and sink type for digital inputs
  • 32-bit edge counters for all digital inputs
  • dual watchdog(system and communication)
  • 2000 VAC isolation voltage
  • temperature operating range: -25 ~ +75°C
  • stackable, up to 16x


The DI16ac I2C-HAT is a 16 digital input channels Raspberry Pi add-on board that uses the I2C bus for communication with Raspberry Pi. It offers 16 isolated source/sink digital input channels. The input channels can be used to count edges, every input channel has two internal 32-bit counter attached, one for counting rising edges and the other for counting falling edges. The DI16ac also has 16 LED indicators for digital inputs status monitoring.


The wide operating input voltage of the digital inputs is perfect for most applications. The isolation protects your Raspberry Pi from the harsh external environment.
Users can stack up to 16 DI16ac I2C-HATs on one Raspberry Pi. Make sure every DI16ac from the stack has a unique I2C bus address. Setting the address value is accomplished using the on board I2C address jumpers.


Power Consumption 0.25W(50mA@5V) max.
Voltage Supply 5V
Operating Temperature -25 to 75°C
Watchdog Timer System and Communication
Digital Inputs
Digital Input Channels 16
Signal Type Sink and source isolated channels with common ground or power
On Voltage Level +3 to +30V
Off Voltage Level +1V max.
Counter Channels : 32(16 rising, 16 falling), Max. Counts: 32-bit, Max. Input Frequency : 100Hz, Min. Pulse Width : 5ms
Isolation Voltage 2000 VAC
Input Resistance 5.6K

Pin Assignments

The DI16ac I2C-HAT has 2 connectors(10 pin, 3.81mm pitch). The pins are divided into 4 blocks, 2 blocks on each of the connectors. Every block has 5 pins, 4 Digital Input pins and 1 Common pin.

Every input channel uses to pins:

  • Ix
  • COMy

x is the channel index, range [0 .. 15].
y is pin block index

Input channels [0 .. 3] use COM0, input channels [4 .. 7] use COM1 and so on.

For details about wiring diagrams check the Digital Inputs Sink/Source Types in the Application Wiring POST


2 x 10 pin detachable screw terminal, pitch 3.81 mm


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