Modbus RTU Controllers
Compact DIN-rail AutomationCompact DIN-rail controllers with relays and multifunction I/O (0-10V, 4-20mA, NTC, digital). Built-in rule engine — use standalone or with a Wolf Gateway.
Three Controllers, One Platform
All three controllers use the same Modbus register patterns, configuration workflow, and front-panel layout — what you learn on one model carries to the others. Choose based on your I/O requirements.
6Oi6Ro
Opto-isolated DI Relays
6 opto-isolated digital inputs, 6 relays. For clean digital signals and industrial switching.
6Ai6Ro
DI 0-10V 4-20mA NTC Relays
6 multifunction inputs, 6 relays. The universal automation controller.
6ADi4Ro2AVo2AIo
DI 0-10V 4-20mA NTC Relays 0-10V out 4-20mA out
6 inputs, 4 relays, plus analog voltage and current outputs.
Model Comparison
What differs between models — pick by your I/O needs.
| Feature | 6Oi6Ro | 6Ai6Ro | 6ADi4Ro2AVo2AIo |
|---|---|---|---|
| Input Count | 6 opto-isolated digital | 6 multifunction | 6 multifunction |
| Input Modes | Digital only (opto-isolated) | Digital / 0-10V / 4-20mA / NTC | Digital / 0-10V / 4-20mA / NTC |
| Relay Outputs | 6× Omron (16A @ 230V) | 6× Omron (16A @ 230V) | 4× Omron (16A @ 230V) |
| Analog Voltage Outputs | – | – | 2× 0-10V |
| Analog Current Outputs | – | – | 2× 4-20mA |
| Communication | RS-485, 300-115200 | RS-485, 300-115200 | RS-485, 300-115200 |
| Power Supply | 9-30V DC | 11-30V DC | 11-30V DC |
| Front Panel Buttons | 6 (disable possible) | 6 (disable possible) | 4 (disable possible) |
| Automation Rules | Up to 8 | Up to 8 | Up to 16 |
| Typical Use | Clean digital inputs, industrial signals | General automation, sensors, relays | Mixed I/O, HVAC, pump/valve control |
Common Specifications
All RTU controllers share the same processor architecture and base hardware platform.
| Parameter | Value |
|---|---|
| CPU | ARM Cortex-M33 @ 76.8 MHz |
| Relay Type | Omron (16A @ 230V) |
| Communication | RS-485, Modbus RTU, 300-115200 bps |
| Mounting | DIN-rail |
| Operating Temperature | -40 to +55 °C |
| Rule Engine | Built-in, standalone operation |
Not Sure Which RTU Controller Fits?
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