qPIO HAT: 4 Relays, 8 Isolated Inputs - The Raspberry Pi I/O Solution.
The qPIO HAT provides industrial control capability for your Raspberry Pi. Featuring 4 high-current relay outputs and 8 optically isolated inputs (standard: 4 contact, 4 level-controlled). All channels utilize tool-less, push-in spring terminals for fast, secure wiring. Secure your projects with superior electrical isolation and professional connectivity.
The Objective Behind qPIO
Our goal was simple: to create a reliable and durable I/O expansion module for the Raspberry Pi. We noticed a gap in the market for a professional-grade yet accessible solution that could be used by both hobbyists and industrial professionals alike. We wanted to build more than just a product; we aimed to provide a trusted solution that empowers you to take your projects to the next level with confidence, no matter the application.
Design Choices for qPIO
From Factor
For easy assembly, qUPS has HAT form factor. Simply connect it via the 40 pin header.
Stackability
Pins on the connector are long ones, all can be accessed from the top of the product.
Reliable connection
Massive, soldered pin header for power and signal connection. Pogo pins are not reliable.
Zero firmware
Everything is done by hardware.
GPIO communication
Easy programming. Avoid extra load on capacitance limited I2C bus. 12 GPIO ports for communication.
Optical isolation
Optically isolated channels safeguard your Raspberry Pi from electrical noise and damage.
Input types
Each inputs can be level or contact type. Type can be setup only at manufacturing process.
Wide input voltage range
3-45V range for level type inputs.
High quality IO connectors
All IO connectors are high quality, vibration-resistant spring terminals.
Visual feedback
A dedicated LED shows the real-time ON/OFF status of each relay.
Versatile SPDT Relays
Each relay features both Normally Open (NO) and Normally Closed (NC) contacts, letting you choose how to control your circuits.
qPIO User Interface and Indicators
1 - Raspberry Pi 2x20 pin connector
2 - LED feedback
3 - Relays
4 - Output connector
5 - Input connector
Technical Specs of the qPIO
- Form factor
- Raspberry Pi HAT
- Dimensions
- 65x56x23 mm + 11mm header
- Stackable

- Number of input
- 8
- Input types
- Contact or Level
- Input voltage range
- 3-45V
- Number of outputs
- 4
- Output type
- Relay
- Relay type
- SPDT
- Max voltage
- 250V AC, 30V DC
- Max current ("NO")
- 10A AC, 5A DC
- Max current ("NC")
- 3A
- Connection type
- Spring terminal
- Vibration resistant

- Method
- GPIO ports
- Used GPIO ports for input
- 8
- Used GPIO ports for output
- 4
- Optical isolation

- Relay state

- Control software
- C++ & Python
