RS485 Relay Output Module
8-channel relay output module over Modbus RTU for barn lighting, misting and spray control. 3000V isolated RS-485.
RS485 Relay Output Module
Our 8-channel relay output module switches barn equipment — lighting, mist cooling, spray lines and other loads — directly from the RS-485 bus using the standard Modbus RTU protocol. Channels are controlled individually or in batches, with addresses 1-32 (power-off saved) to match the edge controller. The 3000V-isolated RS-485 interface reaches up to 1200m, with reverse-polarity, over-current and surge protection built in.
Key Features
- 8 independent relay channels (5A @ 250VAC / 30VDC)
- Standard Modbus RTU, address 1-32 with power-off save
- 3000V isolated RS-485 bus, up to 1200m (120Ω termination for long runs)
- Reverse-polarity, over-current and lightning surge protection
- DIN-rail mounting, DC 6-36V wide voltage, -40°C to +85°C
Technical Specifications
| Channels | 8 relay outputs |
| Relay Rating | 5A @ 250VAC / 30VDC |
| Protocol | Modbus RTU |
| Address Range | 1~32 (power-off save) |
| Baud Rate | 4800~115200bps (8N1) |
| Bus Isolation | 3000V, ≤1200m |
| Power Supply | DC 6~36V |
| Power Consumption | ≈35mA per energized relay channel |
| Working Temperature | -40°C ~ +85°C |
| Mounting | DIN rail (35mm) or screw |
Applications
Related Products
Edge Controller
Industrial edge controller for livestock barns. Connects sensors and actuators over dual RS-485 buses and runs automation rules locally, even when offline.
RS485 Analog Output Module
8-channel 0-10V analog output module over Modbus RTU. 12-bit resolution for EC fan speed and inverter control.