Smart Modbus RTU Controller with 6 Analog/Digital Inputs and 6 Relays for Versatile Automation

Reliable. Flexible. Built for modern automation.

Free sample controller – no obligation, free shipping even if return is requested
6 universal inputs – support 0–10 V, 4–20 mA, NTC, or digital modes
6 relay outputs – industrial-grade Omron® relays
Built-in rule engine – enables autonomous operation without a Modbus Master

The FoxIoT 6Ai6Ro is a compact and powerful Modbus RTU controller featuring 6 flexible inputs and 6 high-performance relay outputs. Designed for rapid deployment and reliable local automation, it operates independently or as part of a larger Modbus system. Ideal for building management (BMS), virtual power plants (VPP), HVAC, and industrial control.

Retail price €89 – yours free for evaluation
Shipped free across the EU.

FoxIoT 6Ai6Ro Modbus RTU Controller With 6 Inputs And 6 Relay Outputs, Designed For Building Automation And VPP Systems

Key Features

  • 6 configurable inputs: digital, precise 16-bit analog (0–10 V or 4–20 mA with external resistor), or NTC temperature mode (with software pull-up for dry contacts)

  • High-accuracy analog inputs (±0.1% or ±3 mV)

  • 6 high-quality Omron relay outputs (max 16A)

  • Modbus RTU communication up to 115200 bps

  • Configure address, baudrate, and parity via buttons or Modbus

  • Built-in rule engine for local automation logic

  • Status LEDs and manual relay control buttons

  • Wide input voltage: 10–30 VDC

  • Wide operating temperature range (–40 °C to +55 °C)

  • 32-bit ARM Cortex-M33 processor (up to 76.8 MHz) ensures responsive performance

  • Pluggable terminal blocks for quick wiring

  • DIN rail mountable

Why Technicians and Integrators Love 6Ai6Ro

  • Tool-free setup via onboard buttons for address and serial settings

  • Manual relay control and status LEDs for easy testing

  • Instant reaction & reliability — internal rules handle logic locally and keep the system running even if Modbus communication is lost

  • Adaptable input modes — digital, analog, or NTC configuration via software

  • Reliable Omron relays — Omron components are trusted for high endurance and consistent performance

  • Fast installation and maintenance with pluggable connectors

  • Robust protection — tolerant to wiring mistakes, ±30 V on RS-485 lines, and protected inputs

  • Flexible and remote configuration — all settings can be adjusted via Modbus RTU to suit various integration needs

Typical Use Cases

  • Building automation and HVAC — ideal for room control applications such as lighting, heating, cooling, ventilation, or curtains using temperature sensors and internal logic

  • Industrial process control — read analog signals and switch relays to interface with external automation systems

  • VPP (Virtual Power Plant) applications — maintain safe fallback states if communication with the master controller is lost

  • Pump and level control — use analog or digital inputs to automate fluid systems

  • Agricultural automation — automate irrigation, temperature, or ventilation based on sensor input

  • Remote sites — perform critical actions locally even without Modbus communication

Documentation & Resources

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We offer flexible pricing for bulk orders, system integrators, and long-term partners.
If you're planning to use the 6Ai6Ro controller in building automation, industrial control, or VPP projects — we'd love to hear from you.

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