EA-PLC Series – Modular Industrial PLC Platform

What is it?

The EA-PLC Series is a modular industrial programmable logic controller (PLC) platform designed for engineers, system integrators, OEMs, and automation enthusiasts who need a flexible control system without paying for unused I/O.

Each PLC is built around the EA-CORE-407 CPU module and can be expanded with a combination of analog and digital I/O modules to match the exact requirements of your application.

The platform supports:

• 1 × EA-CORE-407 CPU Module
• 0–1 × EA-AIO-74412R-4CH Analog I/O Module
• Up to 8 × Digital I/O Modules
• Up to 128 Digital Inputs
• Up to 128 Relay Outputs
• Up to 4 Universal Analog Channels

Whether you're building a machine controller, process automation system, remote I/O station, test bench, or custom industrial product, the EA-PLC Series provides a scalable hardware foundation.

Why was it created?

Many industrial PLC platforms are expensive, closed, and force users to purchase large amounts of I/O they may never use.

The EA-PLC Series was developed to provide:

• Modular expansion
• Industrial-grade hardware
• Affordable system scaling
• Full hardware documentation
• STM32-based flexibility

Start with a CPU module and add only the I/O required for your project.

Key Features

Modular Architecture

Build the PLC you need:

• Digital Inputs only
• Digital Outputs only
• Mixed I/O systems
• Analog + Digital systems

Install up to eight digital expansion modules in any combination.

Powerful STM32F407 CPU

The EA-CORE-407 CPU module features:

• STM32F407VGT6 ARM Cortex-M4
• 168 MHz CPU
• 1 MB Flash Memory
• 192 KB RAM
• RS485
• CAN Bus
• USB-UART
• RTC with battery backup
• SPI Flash
• MicroSD storage

Universal Analog I/O

The optional EA-AIO-74412R-4CH module provides four independently configurable channels based on the Analog Devices AD74412R.

Each channel can operate as:

• Voltage Input (0–10V)
• Current Input (0–25mA)
• Voltage Output (0–10V)
• Current Output (0–25mA)
• 2-Wire RTD (PT100/PT1000)

Industrial Digital Inputs

• 16 channels per module
• 24VDC PNP inputs
• Opto-isolated field interface
• Surge-protected design
• Industrial screw terminals

Industrial Relay Outputs

Available in:

• 8-channel relay output module
• 16-channel relay output module

Relay specifications:

• SPST Normally Open
• 5A Contact Rating
• 30VDC / 250VAC Switching
• Industrial-grade relays

Industrial Protection

All modules include:

• TVS surge protection
• Reverse polarity protection
• 24VDC industrial operation
• Robust field wiring interfaces

Fully Documented

Documentation includes:

• System Manual
• Module Manuals
• Connector Pinouts
• GPIO Maps
• Mechanical Dimensions
• Wiring Guidelines
• Configuration Rules

Applications

• Industrial Automation
• Machine Control
• Process Control
• Energy Management
• Building Automation
• Test & Measurement Systems
• Remote I/O Stations
• OEM Equipment

Designed and Manufactured in the USA

The EA-PLC Series is designed, assembled, and tested in the United States with a focus on reliability, flexibility, and long-term maintainability.