M-Duino 21+ PLC

The M-Duino 21+ PLC from Industrial Shields is a programmable logic controller built around the Arduino Mega 2560 platform. Featuring 21 total inputs and outputs, integrated Ethernet connectivity, and industrial communication interfaces, this controller is designed for automation, equipment monitoring, and connected control applications.

Available through AIWTS, the M-Duino 21+ combines Arduino-based development with industrial I/O capabilities in a compact controller.

Industrial Automation and I/O Configuration

The M-Duino 21+ provides 13 inputs and 8 outputs, allowing engineers to connect compatible sensors, monitoring equipment, and control devices.

Its configuration includes:

• 6 analog/digital inputs
• 7 isolated digital inputs, including 2 interrupt-capable inputs
• 3 analog/digital/PWM outputs
• 5 isolated digital outputs
• 21 total I/O points

Analog input channels support 0–10 VDC signals, while analog/digital input channels support digital signals from 0–24 VDC.

This configuration makes the controller suitable for applications involving sensor monitoring, signal processing, and industrial equipment control.

Arduino Mega 2560 Platform

The M-Duino 21+ PLC uses the ATmega2560 microcontroller and supports development through the Arduino IDE with Industrial Shields board packages.

Controller specifications include:

• Arduino Mega 2560 architecture
• ATmega2560 microcontroller
• 16 MHz clock speed
• 256 KB flash memory
• 8 KB SRAM
• 4 KB EEPROM

The Arduino-based platform provides a familiar development environment for engineers working on industrial automation projects.

Ethernet and Industrial Connectivity

The M-Duino 21+ offers multiple communication interfaces for connecting compatible industrial devices and control systems.

Available interfaces include:

• Ethernet (W5500)
• RS-485 and RS-232
• I²C and SPI
• Serial TTL
• USB 2.0 Type-B
• Real-time clock (RTC)
• MicroSD

These interfaces support integration into monitoring, data collection, and industrial automation applications.

Electrical and Environmental Specifications

The controller operates using a 12–24 VDC power supply and supports ambient operating temperatures from 0°C to 60°C.

Physical specifications include:

• Dimensions: 119.5 × 70.1 × 101 mm
• Maximum weight: 378 g
• Power consumption: 2.88 W under the manufacturer’s stated test conditions

The power consumption figure is measured at 24 VDC with all outputs active and no external load. It is not the maximum power requirement.

The controller must be installed in an appropriate protective enclosure or electrical cabinet according to the manufacturer’s instructions.

Order the M-Duino 21+ PLC from AIWTS

AIWTS offers the M-Duino 21+ PLC for $232.00, including delivery within the United States.

Purchasing benefits include:

• US delivery in approximately 3–5 days
• 6-month product warranty
• Complimentary technical and product development support
• 10% discount on qualifying orders of 10 or more units

Review the official M-Duino Family Datasheet for detailed electrical specifications, wiring diagrams, and installation requirements before purchasing.