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10 I/Os Relay Module - CPU Arduino NANO (Relay Output)
The 10 I/Os Relay Module is an industrial PLC based on the Arduino Nano with relay outputs for switching higher-voltage loads. It provides a simple, cost-eff...
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The 10 I/Os Relay Module is an industrial PLC based on the Arduino Nano with relay outputs for switching higher-voltage loads. It provides a simple, cost-effective, and open-source approach to industrial monitoring and control, with standardised PLC connectors and support for RS485, Ethernet (TCP/IP, Modbus TCP, Modbus RTU), and optoisolated inputs.
Powered by 12–24V DC, the module features optoisolated digital inputs and relay outputs for switching AC and DC loads. The relay outputs make it suitable for directly controlling motors, pumps, solenoids, and other actuators. Program it using the Arduino IDE over USB.
Key Features
- Arduino Nano MCU – ATmega328P at 16MHz with 32KB Flash, 2KB SRAM, and 1KB EEPROM
- 10 I/O Interfaces – Optoisolated digital inputs (3.3–24V DC at 10Hz / 220V AC) and relay outputs (24V DC)
- Relay Outputs – Directly switch higher-voltage AC and DC loads
- Standardised PLC Connectors – Industrial-grade connectors for reliable wiring
- RS485 Communication – Modbus RTU support for industrial networking
- Ethernet Port – TCP/IP and Modbus TCP connectivity
- USB Programming – Program via Arduino IDE over USB
- 12–24V DC Power – Operating range 11.4–25.4V DC, rated power 30W, max current 1.5A
Specifications
- Operating Temperature – 0°C to 60°C
- Operating Humidity – 10%–90%
- Storage Temperature – -20°C to 60°C
Ideal For
- Industrial machine monitoring and control
- AC and DC motor control
- HVAC systems (fans, pumps, air conditioning)
- Elevator control systems
- Alarm and security automation
- Production line automation
Package Contents
- 1× 10 I/Os Relay Module – CPU Arduino Nano (Relay Output)
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- ATmega328P
- An 8-bit microcontroller chip used on many Arduino Uno-compatible boards. Knowing the controller uses an ATmega328P helps you understand its memory, speed, pin compatibility, and the Arduino sketches it can run.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- EEPROM
- A type of non-volatile memory that keeps stored data even when power is turned off. In a sensor module, it can be used to store settings or calibration data so they do not need to be re-entered every time.
- IDE
- Short for Integrated Development Environment, a program used to write, run and manage code. It matters because some learners prefer a traditional coding workspace instead of a guided notebook-style lesson.
- Modbus
- Modbus is an industrial communication protocol used by many meters, sensors, PLCs and automation devices. When a product lists Modbus support, it is generally easier to integrate with existing industrial equipment that speaks the same protocol.
- Modbus RTU
- Modbus RTU is a version of the Modbus protocol that runs over serial wiring, commonly RS485. When a product lists Modbus RTU, it can connect to industrial sensors, meters or drives that use serial Modbus rather than Ethernet.
- Modbus TCP
- Modbus TCP is a version of the Modbus protocol that runs over Ethernet networks. When a product lists Modbus TCP, it can connect to industrial systems that communicate over standard network cabling.
- Relay module
- A relay module uses an electrically controlled switch to let a low-power microcontroller control a separate circuit. It matters when switching devices that need different voltages or more current than a microcontroller pin can safely handle.
- RS485
- RS485 is a robust differential serial communication standard often used in factories, farms and buildings where cables may be long or electrically noisy, and it can link many devices on a single pair of wires. When a product lists RS485, it can communicate with industrial sensors, meters and control equipment over longer distances than typical hobby serial wiring.
- SRAM
- Fast temporary memory used by a processor while a program is running. More SRAM helps with projects that handle larger data buffers, networking, displays, or more complex code.
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