Waveshare Industrial Modbus RTU 8-Ch Relay Module (B) w/ RS485 Interface, 7~36V Power Supply

• Waveshare Industrial Modbus RTU 8-Ch Relay Module (B) w/ RS485 Interface, 7~36V Power Supply
• Efficient RS485 control with Modbus RTU protocol
• Ensures robust performance via embedded protection
• Supports up to 10A at 250VAC or 30VDC
• Offers configurable addresses and cascading
• Simplifies installation with rail-mounted design

The Waveshare Industrial Modbus RTU 8-Ch Relay Module (B) w/ RS485 Interface, 7~36V Power Supply is an advanced industrial relay module designed for efficient control via the RS485 bus using the Modbus RTU protocol. It is equipped with embedded protection circuits, including power isolation, magnetic isolation, and TVS diode, ensuring robust performance and safety. The module is housed in a durable ABS enclosure, making it suitable for various industrial applications requiring high communication standards.

This relay module supports configurable device addresses, allowing multiple devices to be cascaded on the RS485 bus. It features a flash-on, flash-off function, enabling the relay to be activated for a specified duration before automatically turning off. The onboard unibody power supply isolation provides stable voltage without the need for an additional power source, while magnetic isolation ensures high reliability and strong anti-interference capabilities.

The module includes a resettable fuse and TVS to protect against surge and transient spike voltages, offering over-current and over-voltage protection, as well as lightning and electrostatic resistance. An optocoupler isolation prevents interference from high-voltage circuits, and a dedicated relay driver chip with flyback diode protection enhances driving stability. The reverse-proof circuit safeguards against damage from incorrect connections. The module’s high-quality relay supports a contact rating of up to 10A at 250VAC or 30VDC, and its rail-mounted design facilitates easy installation and safe operation.