16-Channel Modbus Ethernet Relay Module

This 16-channel relay module is designed for demanding control environments, supporting both Modbus RTU and Modbus TCP protocols over dual Ethernet ports. It features PoE power support, cascade communication, and comes housed in a durable ABS rail-mount case for straightforward DIN rail installation.

The module includes optocoupler isolation to protect against high-voltage interference and a reverse-proof circuit to guard against incorrect wiring. The relays are driven by a dedicated chip with flyback diode protection, and are rated for up to 10A at 250VAC or 30VDC.

Multiple power options are available: 7–36V DC input via screw terminal, a direct DC barrel connector, or IEEE 802.3af-compliant PoE. Network setup is flexible, with support for DHCP, DNS, and configuration via software or web interface. Communication modes include TCP Server/Client, UDP, Multicast, HTTP, and MQTT, with a working demo for Alibaba Cloud MQTT.

Relay control supports delayed open/close functions, and commands can be issued via Ethernet using Modbus RTU/TCP. LED indicators provide visual feedback for relay status and network activity.

Note: Power adapter not included (12V DC Barrel Jack supply recommended).

⚠️Electrical Safety Precautions⚠️

• This product should be operated and used by professional electricians or technical personnel. During use, please ensure electrical safety and take protective measures such as anti-leakage and insulation.
• Before installing, maintaining, or replacing relay equipment, make sure to turn off the power and unplug the device.
• Do not attempt to dismantle relay equipment to avoid damaging the device or risking electric shock.
• Please properly install and place the relay equipment. Avoid using it in damp, overly hot, or flammable environments to prevent safety accidents due to improper installation or use.

Features

• 16-channel relay module with industrial-grade design
• Supports Modbus RTU and Modbus TCP protocols
• Dual Ethernet ports for cascade communication
• PoE power supply support (IEEE 802.3af compliant)
• DIN rail-mount ABS enclosure
• Optocoupler isolation for high-voltage protection
• Reverse-proof circuit to prevent damage from incorrect wiring
• Dedicated relay driver chip with flyback diode protection
• Relay contact rating: up to 10A at 250VAC or 30VDC
• Multiple power input options: DC barrel, screw terminal (7–36V), or PoE
• Supports DHCP and DNS for network configuration
• Configurable via software and web browser
• Communication modes: TCP Server/Client, UDP, Multicast, HTTP, MQTT
• Includes MQTT demo for Alibaba Cloud
• Supports delayed open/close relay functions
• LED indicators for relay and network status

Specifications

Resources

• Product Wiki

Package Contents

• 1x 16-Channel Modbus Ethernet Relay Module

Power supply not included