Wolf-3Oi3Ro
3 Relays + 3 Isolated Inputs3 Omron relays, 3 opto-isolated digital inputs, and RS-485 Modbus RTU on a Linux platform — for VPP curtailment, switching equipment on and off, and bridging ground-isolated digital signals between separate systems.
Why Wolf-3Oi3Ro
Switch Equipment Directly
3 high-quality Omron relays rated 5 A at 230 V AC — directly control inverters, contactors, and other equipment without external switching gear.
Isolated Signal Bridging
3 opto-isolated digital inputs safely receive signals between automation systems without ground-loop issues. Polarity-insensitive, accept up to 30 V DC.
Connect to Any Protocol
Talk to field devices over RS-485 Modbus RTU, and forward their data to your cloud or control system via MQTT, REST API, or Modbus TCP — over Ethernet or 4G/LTE. One unit links your field equipment to your software.
Key Specifications
| Parameter | Value |
|---|---|
| Digital Inputs | 3 × opto-isolated (max 30 V DC) |
| Relay Outputs | 3 × Omron (5 A @ 230 V AC) |
| RS-485 | 1 port, Modbus RTU, 300–115200 bps |
| Power Supply | 9–30 V DC |
| Operating Temperature | −40 to +55 °C |
Use Cases
VPP — Virtual Power Plant
Receives commands and setpoints from your VPP platform via MQTT or Modbus TCP. Commands PV inverters and batteries over Modbus (TCP or RTU), and switches grid equipment via the relays. Reports status back to your system.
Bridge Signals Between Systems
Take a binary signal from one automation system (PLC, alarm panel, BMS) and pass it to another via the opto-isolated input + relay output. The optical isolation prevents ground loops between systems that shouldn't share a ground.
Remote Equipment Control
Connect via 4G/LTE from anywhere. Switch equipment, read inputs, run automation rules locally when the cloud is offline. Status streams back via MQTT or REST when reception returns — fit for pumping stations and off-grid sites.
Full Specifications
Expansion Card
| Parameter | Value |
|---|---|
| Digital Inputs | 3 × opto-isolated (max 30 V DC, polarity-insensitive) |
| Relay Outputs | 3 × Omron G6RN-1 (5 A @ 230 V AC, >100,000 operations) |
| RS-485 | SN65HVD1781DR transceiver, ±15 kV HBM ESD, ±60 V bus fault, 120 Ω termination |
| Auto Detection | Onboard EEPROM for card-type identification |
Motherboard
| Parameter | Value |
|---|---|
| CPU | NUC980 ARM926EJ-S @ 300 MHz |
| Memory | 128 MB DDR II |
| Storage | 128 MB NAND Flash |
| Ethernet | 10/100 Mbps RJ45 |
| USB | Micro USB 2.0 (FW upgrade), USB 2.0 (1 A) |
| SD Card | Micro-SD slot with detection |
| SIM | Nano SIM (for LTE modem) |
| Mini PCIe | USB 2.0 — for 4G/LTE/NB-IoT/WiFi modules |
| Crypto | AES-256, RSA-2048, SHA-512, ECC-256, HMAC, RNG |
| RTC | Real-time clock (battery backup optional) |
| Sensors | Onboard PCB temperature, input voltage monitoring |
| Status LEDs | 2× programmable (heartbeat + user by default) |
Mechanical
| Parameter | Value |
|---|---|
| Mounting | DIN-rail |
| Dimensions | 126 × 79.4 × 32.7 mm |
| Weight | ~350 g |
| Operating Temperature | −40 to +55 °C |
| Storage Temperature | −40 to +75 °C |
| Humidity | 5–90 % (non-condensing) |
Power
| Parameter | Value |
|---|---|
| Input Range | 9–30 V DC |
| DC Jack | 2.1 / 5.5 mm |
| Average Power | 0.6 W @ 12 V DC |
| Reverse Voltage Protection | Yes |
Compliance & Security
Product security information is published per the EU Cyber Resilience Act (Regulation 2024/2847).
| Document | Audience | Format |
|---|---|---|
| Product Security Information (CRA-UI-001) | Standard Wolf Gateway firmware | PDF ↓ |
| Firmware Releases | Signed Wolf-OS / Wolf-App bundles | Index → |
Vulnerabilities → security@foxiot.eu. See the coordinated disclosure policy.
Related Products
Wolf-App
Ready Automation MQTT Modbus TCP
Drop-in automation software for the Wolf Gateway. Receives cloud commands, controls equipment, sends metrics — configure once, deploy to many units.
Wolf-OS
Linux Platform Custom Firmware Build System
Clean Linux platform for running your own software on proven industrial hardware. Safe updates, expansion-card auto-detection.
Wolf-8ADio1Ro
8 Multifunction I/O Relay RS-485
8 multifunction I/O ports + 1 relay — for sensors, HVAC, and mixed-signal automation. Replaces multiple Wolf-3Oi3Ro units when more inputs are needed.
Wolf-2DALI
2× DALI-2 Bus power RS-485
Two DALI-2 lighting buses with integrated bus power — commissioning, scenes, groups, and emergency-lighting tests.
Wolf-2RS485
2× RS-485 Independent baud
Need a second serial bus instead of relays? Two independent RS-485 ports for multi-device Modbus or protocol bridging.
Test Wolf-3Oi3Ro Without Commitment
Shipped to qualified engineers and integrators across the EU. Test it in your project.