8-Channel Relay (C) PoE Ethernet RTU/Modbus TCP Protocol

The Modbus PoE Ethernet Relay (C) is a powerful relay module for networks that is powered by PoE and can be controlled via Ethernet or RS485. It supports Modbus TCP as well as Modbus RTU and additionally offers HTTP and TCP control, making it flexible for integration into industrial controls and smart home projects. With a total of 8 relay channels, motors, pumps, lamps, or heaters can be reliably switched. Each channel is designed for up to 10 A at 250 V AC or 30 V DC. Additionally, 8 digital inputs with optical isolation are available that can process signals in the range of 5 to 36 V. The module features a dual-port Ethernet connection, making it easy to cascade, and status LEDs for power supply and relay status. Thanks to Power-over-Ethernet (IEEE 802.3af), a single cable is sufficient for power and communication, with the option of being powered via a DC input. The robust housing protects the electronics and facilitates installation in industrial environments or smart homes.

Recommended Accessories:

• 12V DC 4000mA Power Supply AC/DC Adapter 5.5mm/2.1mm Connector Waveshare
• Ethernet Patch Cable RJ45 Cat.6 Network Cable
• PoE Switch or PoE Injector

Features:

• The module supports Modbus TCP, Modbus RTU, as well as HTTP/TCP control.
• The power supply is provided directly via PoE (IEEE 802.3af) or alternatively via DC 7–36 V.
• It offers 8 relay channels each with up to 10 A at 250 V AC or 30 V DC.
• 8 digital inputs with optical isolation allow versatile signal processing.
• A dual-port Ethernet facilitates the cascading of multiple modules.
• Status LEDs indicate the power supply and relay status.
• The sturdy housing protects the electronics and allows permanent use.

Application Examples:

• For users who want to comfortably control relays over an Ethernet network.
• Use in smart home projects for the control of lighting or heating systems.
• Integration into industrial controls via Modbus TCP/RTU.
• Switching pumps, motors, and other loads in automation projects.

Documentation:

• Waveshare Wiki

Technical Specifications:

• Manufacturer: Waveshare
• Manufacturer SKU: 30544
• Relay: 8 channels, 1NO/1NC, each ≤10 A @ 250 V AC or ≤10 A @ 30 V DC
• Digital Inputs: 8DI, 5–36 V, NPN/PNP, optically isolated
• Interfaces: Ethernet (Modbus TCP, HTTP, TCP), RS485 (Modbus RTU)
• Ethernet: Dual-port, cascadeable, Status LEDs
• Power Supply: PoE (IEEE 802.3af) or DC 7–36 V
• Protocols: Modbus TCP, Modbus RTU, HTTP, TCP
• Dimension: 175 × 94 × 40 mm
• Weight: 360 g

Contents:

• 1x 8-Channel Relay (C) PoE Ethernet RTU/Modbus TCP Protocol