I2C Bus 8-Way Expansion Board

Name: I2C Bus 8-Way Expansion Board
Brand: ACI Model Railways
SKU: ACI-I2C-EXP-8WAY
Price: 3.00 GBP
Availability: InStock

£3.00

8-way I²C expansion board for connecting multiple compatible accessories to a DCC-EX system, providing a simple and tidy way to expand the I²C bus.

Key Specifications

I²C via Qwiic / STEMMA QT and Dupont

Connectivity

3.3V / 5V I²C systems

Input voltage

Expand Your DCC-EX I²C Connections

Expand a single I²C connection into eight convenient connection points with the ACI I²C Bus 8-Way Expansion Board.

Designed for DCC-EX layout automation, the board provides a simple way to connect multiple compatible I²C devices while keeping layout wiring organised and easy to expand.

Connections are provided for Qwiic / STEMMA QT and Dupont-equipped I²C devices, making the board suitable for integrating compatible controllers, sensors, displays and other I²C accessories into your DCC-EX system.

Additional expansion boards can be connected where more physical I²C connection points are required.

Please note: This is an I²C bus expansion board, not an I²C multiplexer. Connected devices remain on the same I²C bus and must use compatible I²C addresses.

What's Included FAQs

1 × I²C Bus 8-Way Expansion Board.

Can I connect multiple PCA9685 servo controllers?

Yes. Multiple PCA9685 servo controllers can share the I²C bus provided that each controller is configured with a different I²C address.

Can I use it with DCC-EX?

Yes. The board can be used to expand the I²C connections available in a DCC-EX system, making it easier to connect multiple compatible accessories and modules.

Is this an I²C multiplexer?

No. This is a passive I²C expansion board, not a multiplexer. All connected devices share the same I²C bus, so each device must use a compatible and non-conflicting I²C address.

What does the I²C 8-Way Expansion Board do?

The expansion board provides additional connection points for the I²C bus, allowing multiple compatible devices such as servo controllers, displays, sensors and I/O modules to be connected to the same I²C bus.