The Waveshare Industrial Modbus RTU 8-channel Relay Module (D) is a high-reliability industrial-grade relay board that integrates 8 relay outputs and multiple digital inputs, designed for use in industrial automation, smart energy systems, home automation, and control cabinets. It communicates using the Modbus RTU protocol over RS485, enabling seamless integration into PLCs, SCADA systems, and other industrial control platforms. This version features multi-isolation protection, including photocoupler isolation for inputs and electromagnetic isolation on RS485, ensuring safe and stable operation in harsh environments. The module supports a wide power supply range from 7V to 36V, making it suitable for industrial voltage rails.
🔹 Key Features:
• 8 relay channels with high load capacity
• RS485 Modbus RTU protocol communication
• Multi-level isolation: RS485 isolated, digital input opto-isolated
• Supports standard Modbus commands (e.g., 0x01, 0x02, 0x03, 0x05, 0x0F)
• DIN rail mountable for industrial use
• Compatible with Raspberry Pi, PLCs, and industrial PCs
• Supports broadcast address and baud rate configuration via DIP switches
• Built-in TVS diodes, ESD, and surge protection
⚠️ Note: When connecting to RS485 networks, ensure correct termination and ground referencing. Configure the Modbus address and baud rate using the onboard DIP switches before connecting to the network. Proper protection should be provided against high voltage spikes if used in inductive load scenarios.
