Multi-IO 8-Layer Stackable HAT for Raspberry Pi

The Multi-IO Card, designed for the Raspberry Pi, is a sophisticated HAT that offers a plethora of features suitable for robotic applications. This includes a variety of analogue and digital inputs and outputs, two serial ports, an H-Bridge motor driver, two relays, and two servo ports. Additionally, it features two RTD inputs for precise temperature measurements and six programmable LEDs that can be linked to any input or output, activating upon reaching a set signal threshold. Compatible with all Raspberry Pi versions from Zero to 5, the card’s use is simplified by pluggable connectors.

Its relays can switch loads up to 8A and 24V, and status LEDs indicate the relay states and board power. A pushbutton on the card allows for general commands or shutdown of the Raspberry Pi. The card also includes a 24-bit A/D converter for the two 3-Wire RTD ports, an RS485 port compatible with MODBUS protocol for communication with industrial equipment, and an RS232 transceiver connected to one of the Raspberry Pi’s USARTs. Mechanically, the card conforms to the Sequent Microsystems Modular Industrial format, enabling installation in a free, 3D printable, stackable enclosure and maintaining uniform mechanical specifications across all cards in this format.

Note: The relays may come in blue or black, depending on the batch.

What’s on Board

Features

• Multi-IO 8-Layer Stackable HAT for Raspberry Pi
• Uses only an I2C port, and works with all Raspberry Pi versions from Zero to 5
• Wide range 10-30V power supply provides also 5V/3A to Raspberry Pi
• Two optoisolated or four common-ground digital inputs
• Two 3-wire RTD ports with 24-bit delta-sigma A/D converters
• Two 0-10V analogue inputs 200 sps
• Two 4-20mA analogue inputs 200 sps
• Two 0-10V analogue outputs
• Two 4-20mA analogue outputs
• Two 5A/24V relays with normal-open contacts and status LEDs
• H-Bridge PWM Motor Driver
• Two servo control ports
• Nine Status LEDs (six general purpose)
• On-board push-button
• Hardware watchdog
• Real Time Clock with battery backup
• Pluggable Connectors
• Stand-alone operation (No Raspberry Pi) using RS485/MODBUS
• On-board 5V/2.5A step-down power supply for Raspberry Pi
• Eight-layer stackable for IO expansion

Resources

• User’s Guide V1.3
• Hardware Schematic V1.3
• 3D Printing Enclosure
• 3D STEP Model
• Command Line
• Python Libraries

Pinout

Package Contents

• 1x Multi-IO Card
• Mounting Hardware
  • 4x M2.5 x 18mm male-female brass standoffs
  • 4x M2.5 x 5mm Brass Screws
  • 4x M2.5 Brass Nuts
• 4x Jumpers
• 9x Female Mating Connector Plugs